Portable Oscilloscopes List (cheap) - Page 1
Forum section: electronics / testgear

author: chemary
author_rank: Contributor
timestamp: November 29, 2023, 02:14:15 am
content: I want to add an affordable portable oscilloscope to my test gear and I have spend some time reading posts on EEVBlog and watching reviews on YouTube and other sources, as information is quite spread and the variety of models is important I wanted to start a thread with an aggregate of some of the available information.Information is not very complete and I got them from product specifications, that as many of you have tested sometimes is not true (Exaggerated bandwidths).I just wanted the oscilloscope functionality so I haven't put much effort on gathering DMM or Signal Generator specifications.The prices are orientative, most of them from Banggood, maybe they can be found cheaper on Aliexpress.Last columns on the list are for popularity, I understand that products with long discussions on this forum and more reviews are more popular.Direct access to most relevant discussion topic about each oscilloscope:OWON HDS200https://www.eevblog.com/forum/testgear/owon-hds-200-handheld-oscilloscope-w-builtin-dmmawgHantek 2C42/2C72/2D42/2D72https://www.eevblog.com/forum/testgear/hantek-2c422c722d422d72FNIRSI DPOX180Hhttps://www.eevblog.com/forum/testgear/new-toy()-scope-fnirsi-dpox180h-claimed-180mhz500msps-(may-2023)FNIRSI 1013Dhttps://www.eevblog.com/forum/testgear/fnirsi-1013d-100mhz-tablet-oscilloscopeFNIRSI 2C23Thttps://www.eevblog.com/forum/testgear/new-handheld-scopemultimeter-fnirsi-2c23t-2ch-10mhz50msps-(november-2023)FNIRSI 5012Hhttps://www.eevblog.com/forum/projects/reverse-engineering-fnirsi-5012hFNIRSI 1C15https://www.eevblog.com/forum/testgear/fnirsi-1c15-handheld-scopeZEEWEII DSO3D12https://www.eevblog.com/forum/testgear/another-dsodmm-zeeweii-dso3d12-claimed-120mhz250mspsZEEWEII DSO2512Ghttps://www.eevblog.com/forum/testgear/new-2ch-pocket-dsosg-sigpeak-dso2512gZEEWEII DSO1511Ghttps://www.eevblog.com/forum/testgear/dso1511e-reviewZEEWEII DSO154 PROhttps://www.eevblog.com/forum/testgear/new-toy()-scope-dso154pro-1ch-claimed-40mssMUSTOOL MDS120Mhttps://www.eevblog.com/forum/testgear/cheap-portable-scopes-mustool-mds120m-vs-yeapook-ads5012hZOTEK ZT-702S/ZT-703Shttps://www.eevblog.com/forum/testgear/new-zoyi-multimeteroscilloscopes-zt-70xs-up-to-50mhz250msps-(nov-2022)The link to Google Docs is here, you can download and edit ithttps://docs.google.com/spreadsheets/d/1BopqOXi_Ma-n5vy--xQyMtJ3LI1DaQ2Is7zV8jPbhKY/edit?usp=sharing

author: Veteran68
author_rank: Frequent Contributor
timestamp: November 29, 2023, 03:38:43 am
content: Just a suggestion, but since you're including what I'd consider the less capable Mustool MT8200 series, you might as well include the Zoyi ZT-702S too.

author: tautech
author_rank: Super Contributor
timestamp: November 29, 2023, 04:04:32 am
content: Define affordable please.No Siglent or Micsig models in your list.

author: The Soulman
author_rank: Super Contributor
timestamp: November 29, 2023, 04:20:26 am
content: Quote from: tautech on November 29, 2023, 04:04:32 amThe same price-range as the scopes mentioned?

author: csuhi17
author_rank: Frequent Contributor
timestamp: November 29, 2023, 06:27:37 am
content: HDS2202/S is 1 + 1 GSa/sfor the others, it is divided by channel.

author: rf-loop
author_rank: Super Contributor
timestamp: November 29, 2023, 07:07:57 am
content: Quote from: tautech on November 29, 2023, 04:04:32 amThey, Siglent, Micsig, Rigol and other good and safety caring and responsible manufactures products don't belong in the list of toys and cheap junk that also have lies and scams about technical information.So. imho, these are better to keep away from this kind of lists.

author: Aldo22
author_rank: Super Contributor
timestamp: November 29, 2023, 07:18:32 am
content: Two inexpensive devices are missing:Zeeweii DSO1511E / DSO1511GSCO_2_10M

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 29, 2023, 08:27:47 am
content: Quote from: rf-loop on November 29, 2023, 07:07:57 amthe OWON HDS2102S i own is not cheap junk that lies about spec, what are you smoking? we can guess affordable is somewhere $200 or cheaper. siglent portable i just browsed is $400+ tautech is thanking you for brand butt lifting... cheers

author: Aldo22
author_rank: Super Contributor
timestamp: November 29, 2023, 09:07:24 am
content: Quote from: Mechatrommer on November 29, 2023, 08:27:47 amYes, but it doesn't really fit in this list either.It slipped in there because the HDS242 is there for <$150.Imo you should limit this list to around $150.Above that, another price/performance class begins that I would no longer call toy or gadget (not saying these "toys" are useless or have no reason to exist).Tautech is right: "Please define affordable."

author: chemary
author_rank: Contributor
timestamp: November 29, 2023, 09:17:12 am
content: Thanks for your suggestions, I added ZOTEK ZT-702S and Zeeweii DSO1511G, for SCO_2_10M I prefer not to include as there is no much information and is unbranded.As you speculate my initial intention was to cut a little below USD $200, OWON HDS2102 is on the limit and the new OWON HDS2202 is way above and only included to reflect that there is a successor on this model line.

author: Aldo22
author_rank: Super Contributor
timestamp: November 29, 2023, 09:32:11 am
content: Quote from: chemary on November 29, 2023, 09:17:12 amBut it belongs on this list as the cheapest 2-channel pocket-oscilloscope.There is actually enough information in theforum thread.Or what is missing?It is true that there is no brand specified, but others such as Mustool or Zeeweii are also offered under a wide variety of brands.The model name is actually enough to recognize it.For brand, you can simply write "no name" or something like that.

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 29, 2023, 11:39:36 am
content: Quote from: Aldo22 on November 29, 2023, 09:07:24 ameither way HDS242 is based on same hw/design as HDS2102S, they are not cheap lying junk...Quote from: Aldo22 on November 29, 2023, 09:07:24 amwithout government intervention about the definition, it will stay subjective... student may limit affordable as $50, businessmen may afford to buy $400+ or even much more to $10K range.. so lets wait what OP want to define, we could get a hint from the list he provided already. ymmv.

author: Aldo22
author_rank: Super Contributor
timestamp: November 29, 2023, 02:18:58 pm
content: Quote from: Mechatrommer on November 29, 2023, 11:39:36 amNo, the Owons are not cheap, lying junk, but "honest" 250/125 MSa/s do not work miracles either, above all they are not really "cheap".HDS272S costs $175, which gets you two DSO2512Gs, lying or not.Quote from: Mechatrommer on November 29, 2023, 11:39:36 amChemary wrote:Quote from: chemary on November 29, 2023, 09:17:12 amFor me, the limit would be $150.

author: rf-loop
author_rank: Super Contributor
timestamp: November 29, 2023, 03:21:02 pm
content: Quote from: Mechatrommer on November 29, 2023, 08:27:47 amopps... I was bit carelessYep, very exception, there really was one cherry in the mix. .

author: RAPo
author_rank: Super Contributor
timestamp: November 29, 2023, 03:28:32 pm
content: The long awaited Zotek 703S 2channel+multimeter just appeared on Aliexpress. It Eu89 so fits in your list.

author: BrokenYugo
author_rank: Super Contributor
timestamp: November 29, 2023, 04:25:29 pm
content: On the bottom dollar end I think DSO154pro is worth looking at. 18MHz, 40MS/s, single channel, ~35USD (regular price) delivered with probe and battery.

author: chemary
author_rank: Contributor
timestamp: November 29, 2023, 05:31:59 pm
content: The reason DSO154pro was not included is because it doesn't even have a proper case and feels like a DIY kit, but is true the specs are quite good for the price.Many people use this portable oscilloscopes to work with mains voltage, they all will work with 10x probe, but not all will survive if you accidentally connect them in 1x mode, I suspect the top ones can deal with it but for the cheapest I first wanted to be sure which is the max rating of the oscilloscope input. I think all this ones will release magic smoke if something above 40V is connected to the input:ZEEWEII DSO154proFNIRSI DSO-TC3SCO_2_10MFNIRSI DSO152

author: rsjsouza
author_rank: Super Contributor
timestamp: November 29, 2023, 06:00:19 pm
content: Interesting list. Following...

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 29, 2023, 06:02:38 pm
content: Quote from: Aldo22 on November 29, 2023, 02:18:58 pmyou get what you pay for... if you ask me, i prefer one honest guy than 2 dishonest guys, even if they are cheaper. if you look around carefully, you are not comparing apple to apple, you may regret it one day... ymmv..Quote from: rsjsouza on November 29, 2023, 06:00:19 pmOP should also state "actual" spec such as sampling rate from real people reviewing them in order to make the list usefull. ymmv.

author: chemary
author_rank: Contributor
timestamp: November 29, 2023, 06:58:04 pm
content: Quote from: Mechatrommer on November 29, 2023, 06:02:38 pmI agree, is something I wanted to do. For real bandwidth some oscilloscope descriptions indicate the rise time, but probably this value is as trustworthy as the bandwidth. Maybe I can incorporate at which frequency signal is attenuated 3dB that is something many reviewers test in their videos. You think this is enough?For real sampling rate I see Dave has checked in some reviews the real sampling rate with 1 and 2 channels pocking directly at the ADC chip, but this information is more difficult to find for all products.Any help to collect those values will be appreciated.

author: uargo
author_rank: Regular Contributor
timestamp: November 30, 2023, 12:34:46 am
content: With all due respect, I think that everything on that list are toys, not oscilloscopes, perhaps the only one that is saved is the owon or the hantek and even so they are very basic models from brands that are on the limit of professional.

author: Veteran68
author_rank: Frequent Contributor
timestamp: November 30, 2023, 01:58:50 am
content: Quote from: uargo on November 30, 2023, 12:34:46 amMost all of them are real oscilloscopes. Let's not be an elitist or a snob.Sometimes this is all someone can afford or justify, and they have their place. If they can display the waveform and give you the information you're looking for, then they've served their purpose. I have more than one "toy" oscilloscope in my collection, and they've all come in handy. There's no reason you can't have a $50 scope alongside your $500 or $5000 scope.

author: Aldo22
author_rank: Super Contributor
timestamp: November 30, 2023, 09:07:10 am
content: Quote from: uargo on November 30, 2023, 12:34:46 amHow do you define that? How can you recognize a "toyscope"?Is it a macho thing like: "Anything below a Porsche is not a car" or is there a clear definition?And no, the fact that the marketing department gives somewhat optimistic specifications is not an indication.The automotive industry also does this in a completely different price segment.

author: NE666
author_rank: Frequent Contributor
timestamp: November 30, 2023, 09:32:24 am
content: Quote from: Veteran68 on November 30, 2023, 01:58:50 am^^ That.Please let's not use these types of thread only to crush the aspirations of the next generation of experimenters and engineers. If you can afford better, good for you. I remember the first advertisement for a "real" scope I ever saw, the Philips PM3055. I drooled over that thing, whilst building on wooden breadboards with screw cups. It was 20 years before I could afford to buy anything in the contemporaneous similar class.As long as these devices can deliver an education experience for the purchaser without exposing them to unnecessary harm, that's just fine in my opinion.

author: rsjsouza
author_rank: Super Contributor
timestamp: November 30, 2023, 12:02:01 pm
content: Quote from: Veteran68 on November 30, 2023, 01:58:50 amIndeed it has its place. I have other oscilloscopes (some portable even) but the form factor and above average mechanical robustness of the ZT-702S are making me use this guy instead of my DMMs when going to the field. The extra "waveform visualizator" is very convenient to have and debug simple DC power rails deviations, inverter outputs, etc.In my home country (Brazil) the import taxes are so incredibly high that such types of equipment are greatly appreciated and allow many to start on this field of electronics (mostly repair and audio) by saving their lunch money. Otherwise, brands such as Rigol or Siglent are completely unaffordable for the casual hobbyist.

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 30, 2023, 12:11:15 pm
content: Quote from: Aldo22 on November 30, 2023, 09:07:10 amsometime we refer "toy" as something cheap. but if it serves our purpose, then its a usefull toy. dishonest spec is something else. what is useless to you doesnt mean useless to others, so keep your personal preferences to yourself.

author: tunk
author_rank: Super Contributor
timestamp: November 30, 2023, 04:03:30 pm
content: Here's few you could add:- Fnirsi DSO Pro- Hanmatek HO52-50M etc. (Owons with a new case)- Tooltop ET829- BSIDE O1- GVDA GD188Quite a few in the list have rebadged versions. Maybe they could be added:- Zoyi ZT-702S: Aneng AOS02, BSIDE ZT-702S, Richmeters 702S- Multicomp (rebranded Owons)- many of the Tooltops, GVDAs, MusTools, etc. have rebrands

author: 4thDoctorWhoFan
author_rank: Regular Contributor
timestamp: November 30, 2023, 06:36:58 pm
content: The ZEEWEII DSO2512G also has video out. I like this feature. I don't know of any other in this price range with video out capabilities.

author: uargo
author_rank: Regular Contributor
timestamp: December 01, 2023, 05:42:08 pm
content: Let's see, don't crucify me, I mean that they are oscilloscopes that are generally very inaccurate in measurements and/or very simple, that they lack basic options, etc., if you are clear about that then go ahead and buy it, but you must know what you buy , because sometimes for a little more you get much better things.I say this because I regretted buying a cheap oscilloscope and lost money with it.for example you have thishttps://www.batronix.com/shop/oscilloscopes/Rigol-DS1102Z-E.htmlfor 291€or thishttps://www.batronix.com/shop/oscilloscopes/Siglent-SDS1202X-E.htmlfor 344€

author: Aldo22
author_rank: Super Contributor
timestamp: December 01, 2023, 06:40:40 pm
content: Quote from: uargo on December 01, 2023, 05:42:08 pmOff topic. The title is "PortableOscilloscopes List (cheap)".Can't a single thread do without a Riglent or Sigol recommendation for once?That said, I have never regretted buying my DSO2512G. Not for a second.It doesn't measure inaccurately either, if you stay within the limits.

author: Randy222
author_rank: Frequent Contributor
timestamp: December 01, 2023, 07:42:37 pm
content: The table in post #1 really needs a column for FFT

author: uargo
author_rank: Regular Contributor
timestamp: December 01, 2023, 07:59:30 pm
content: From that list I would buy the owon or at least the hantek

author: Aldo22
author_rank: Super Contributor
timestamp: December 02, 2023, 01:42:53 pm
content: Quote from: Randy222 on December 01, 2023, 07:42:37 pmSome Fnirsis (DPOX180H, 1013D) and some Zeeweiis (DSO3D12, DSO2512G, DSO1511G) can display an FFT graph, but nothing more.No dedicated window, no scale, no specific cursor, no specific settings. All of them, as far as I know.This may not be completely useless, but even the cheapest benchtop oscilloscope can do much more.Attached are pictures of the Zeeweii DSO2512G and the Hantek DSO2C10 (benchtop, for comparison).

author: nctnico
author_rank: Super Contributor
timestamp: December 02, 2023, 01:54:43 pm
content: Quote from: uargo on November 30, 2023, 12:34:46 amOTOH all of the scopes in the list are very more capable compared to the -brand new- 20MHz analog scope I started out with as a teenager. And I got that scope as a very expensive birthday gift. If you are on a budget, the scopes in the list are a much better buy compared to getting an old analog scope from Ebay.

author: chemary
author_rank: Contributor
timestamp: December 02, 2023, 02:57:27 pm
content: Quote from: Aldo22 on December 02, 2023, 01:42:53 pmI agree, adding a column saying it has FFT functionality based on scope specifications can be misleading if the feature is useless, without having that specific scope to try it or confirmation from owners that it has the most basic features I don't adventure to add it.

author: rhb
author_rank: Super Contributor
timestamp: December 02, 2023, 03:20:05 pm
content: An addition, ToolTop ET120. Unusable. $50.I have an Owon HDS272S and while not as convenient as full size scope does the job very well.Thanks for taking the time to compile the list.Have Fun!Reg

author: evmillan
author_rank: Newbie
timestamp: January 07, 2024, 11:30:06 pm
content: Thank you for the compilation!Just a suggestion, you might include the Zoyi ZT-703s.

author: chemary
author_rank: Contributor
timestamp: January 14, 2024, 09:27:04 pm
content: Quote from: evmillan on January 07, 2024, 11:30:06 pmHello, this was requested some time ago and when I looked for it, it was't available anywhere yet to purchase.I see on thehttps://www.eevblog.com/forum/testgear/new-zoyi-multimeteroscilloscopes-zt-70xs-up-to-50mhz250msps-(nov-2022)/125/topic that people are already receiving the first units. There is no reviews or teardowns still, so I can not fill the real bandwidth or the hardware info. I would only recommend buying it to oscilloscope enthusiasts that want a new specimen on their collection, as is pretty new and firmware seems to have some bugs. Anyway I will try to update the list soon.

author: flywheelz
author_rank: Regular Contributor
timestamp: January 22, 2024, 08:22:49 pm
content: Does anyone know a "cheap" scope with Time based triggers or Trigger delay. To check timing or stretched chain/belt on a car looking at cam/crack signals requires to trigger on TDC or special notch and see the coloration between the two signal as they drift. With normal edge or level trigger its impossible to get a stable picture.

author: csuhi17
author_rank: Frequent Contributor
timestamp: January 22, 2024, 08:33:45 pm
content: Quote from: flywheelz on January 22, 2024, 08:22:49 pmHantek TO1112

author: DiTBho
author_rank: Super Contributor
timestamp: January 26, 2024, 04:21:11 pm
content: is the function generator of the ZeeWeii DSO able to generate a variable duty cycle square wave, say at 10..100Khz?if yes, with a duty cycle from 1% to 99%?let me know

author: chemary
author_rank: Contributor
timestamp: January 26, 2024, 05:12:29 pm
content: Yes you can, but keep in mind the generator has a fixed voltage output, all signals are from 0 to 2.5V an can't be adjusted

author: Atlan
author_rank: Frequent Contributor
timestamp: February 09, 2024, 02:55:54 pm
content: Quote from: flywheelz on January 22, 2024, 08:22:49 pmShow video pls

author: tunk
author_rank: Super Contributor
timestamp: February 09, 2024, 05:39:52 pm
content: Time to add the Zoyi/Zotek ZT-703S to the list?It has been reviewed by e.g. Dave, Defpom and Tony Albus.

author: Randy222
author_rank: Frequent Contributor
timestamp: February 20, 2024, 05:19:08 pm
content: Quote from: tunk on February 09, 2024, 05:39:52 pmThe 703 scope has lots of issues on the current v1.2.7 firmware. Some units shipped with v1.2.8, but I did not hear the 1.2.7 issues were fixed in 1.2.8

author: BillyO
author_rank: Super Contributor
timestamp: March 26, 2024, 01:40:43 am
content: Nice list, but I'm little confused at one of the results. How were these tested? In particular I tested the Zeeweii 154Pro to 18MHz without an issue. It had not even gone 3dB down by that point. How many test results is your listing based on and what specifically was the test equipment/setup? Every single video I have seen testing this scope the people testing it did not terminate the 50 ohm coax coming from a 50 ohm FG properly (with 50 ohms) at the scope end. Just straight in to the scope. At 18MHz that makes a huge difference.I also have a DSO3D12 coming and will test it properly as well.

author: chemary
author_rank: Contributor
timestamp: April 12, 2024, 06:54:40 pm
content: Hello @BillyO, I don't own this devices nor the equipment to properly measure them, I extracted the information from multiple YouTube channels, mostly from @EEVblog, @KerryWongBlog and @TechCornerTV, if you can provide more accurate values for them I will happily update the list.

author: BillyO
author_rank: Super Contributor
timestamp: April 12, 2024, 07:01:25 pm
content: I've just started testing on the DSO3D12, but if you go to time 15:34 of the video below you will see my test of the Zeeweii 154Pro.Or better still, watch the whole thing and the Part 1 video too.

author: BillyO
author_rank: Super Contributor
timestamp: May 01, 2024, 01:46:32 pm
content: Quote from: chemary on April 12, 2024, 06:54:40 pmI did and you did not update the list.Also, I ran a 3-part series on the Zeeweii DSO3D12 and it does indeed have a analog BW of 120, not 82 as you list. Not worth posting those videos though as I see you will not take them as evidence. Not sure why.

author: Jack359
author_rank: Contributor
timestamp: September 23, 2024, 08:58:02 am
content: I just started my studies in mechatronics and wanted to buy nice private scope. Was looking at the new Siglent Sds804x hd and the Rigol alternative but since I read that they have still a lot of bugs to iron out, I'm thinking to start with less capable and cheaper portable scope first.Ideally around 150 USD.Am I right to guess that these ones are still better than used old analogue scope at the same price range ?Which one would you recommend?

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 09:15:25 am
content: Quote from: Jack359 on September 23, 2024, 08:58:02 amThere are different views on this.But I would say that a portable scope will still be useful even if you later have a benchtop scope.Quote from: Jack359 on September 23, 2024, 08:58:02 amUnder $100 with 2 channels I would recommend the DSO2512G.Above $100 you have to consider buying a benchtop model right away if you don't really need the portability (imo).

author: tautech
author_rank: Super Contributor
timestamp: September 23, 2024, 09:21:03 am
content: Quote from: Jack359 on September 23, 2024, 08:58:02 amWhile the 800X HD series is newish, released end of Feb this year, it is entirely based on existing products that go back some 6 years, the SDS5000X series released in 2018:https://www.eevblog.com/forum/testgear/at-last-siglent_s-sds5054x-touchscreen/Since then several more model series all based on the UI, touch and mouse capable GUI but of different BW's and physical sizes where SDS800X is the smallest with a 7" display but don't let that make you underestimate its capabilities, all of which are explored in this thread:https://www.eevblog.com/forum/testgear/sds800x-hd-review-demonstration-thread/These are a DSO thatcanwill serve you admirably for some years until your needs surpass their capabilities.

author: Jack359
author_rank: Contributor
timestamp: September 23, 2024, 09:56:13 am
content: Quote from: Aldo22 on September 23, 2024, 09:15:25 amThank you.Within 150 USD category is Owon HDS242S the best I can get currently ?I can buy it from Europe while 2512G I can find only from Chinese sellers.

author: voltsandjolts
author_rank: Unknown
timestamp: September 23, 2024, 10:05:02 am
content: This HDS2102S shows up as GBP 116.81 delivered to UK inc. taxeshttps://www.aliexpress.com/item/1005005300888993.html

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 10:08:27 am
content: Quote from: Jack359 on September 23, 2024, 09:56:13 amThis is a scopemeter (scope + DMM). It's certainly not bad, but perhaps a bit dated.If you don't need a portable scope or a scopemeter, I would save the money for a benchtop scope.Quote from: Jack359 on September 23, 2024, 09:56:13 amSo what?https://www.aliexpress.com/item/1005006885654959.html

author: Jack359
author_rank: Contributor
timestamp: September 23, 2024, 10:21:06 am
content: Quote from: Aldo22 on September 23, 2024, 10:08:27 amI have never managed to get refund from aliexpress if I had warranty issues with my purchase. Thats why I prefer local European online shops.Is 2512G better scope than HDS242S? I see that it has higher bandwidth and video output (for which I don't have screen so it is irrelevant) but aside that is it better in anything else ?

author: BillyO
author_rank: Super Contributor
timestamp: September 23, 2024, 10:43:55 am
content: Quote from: Jack359 on September 23, 2024, 08:58:02 amThe "bugs" the SDS804X has, these cheap scopes wish they had. Trust me. If you have the money for an SDS804X, don't waste it on a cheapie.

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 10:55:24 am
content: Quote from: Jack359 on September 23, 2024, 10:21:06 amI have complained twice and received a refund twice.Quote from: Jack359 on September 23, 2024, 10:21:06 amYes, it costs half the price and does the same thing.If you have any special requirements, you need to mention them.These small handhelds are no substitute for a benchtop scope.Why not just take a cheap one and save the money for something else?I'm not saying they're useless, but I wouldn't necessarily pay $150+ for one of these, unless you need one for “in the field” work.

author: BillyO
author_rank: Super Contributor
timestamp: September 23, 2024, 02:24:49 pm
content: Quote from: Aldo22 on September 23, 2024, 10:55:24 amI also have never had an insurmountable problem dealing with AliExpress or any of their vendors.

author: Fungus
author_rank: Super Contributor
timestamp: September 23, 2024, 02:40:19 pm
content: Quote from: Jack359 on September 23, 2024, 08:58:02 amNah, simply not worth it. Not only are theymuchworse, they have no resale value.The bugs aren't as bad as you hear. A recent Rigol update fixed basically all of them.(it also introduced one really bad one but they're working on that right now. The next firmware will be here by the time you get one...)Quote from: Jack359 on September 23, 2024, 08:58:02 amAt least 100x better.And they won't break down or be a constant "work in progress".

author: RAPo
author_rank: Super Contributor
timestamp: September 23, 2024, 03:07:19 pm
content: Agreed. Get the portable ones for field work, treat yourself to a good bench scope, and ask Santa for a portable one.Quote from: Fungus on September 23, 2024, 02:40:19 pm

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 03:29:28 pm
content: However, these small, cheap protable scopes also have advantages, which should be recognized.- It is often easier to bring the scope to the DUT than vice versa.- They run on battery power and require little power. In addition, there are no problems with GND.- They start up immediately. Benchtop scopes take up to a minute or longer.- They are noiseless- They take up little space, are lightweight and can easily be stored in a drawer.- The financial risk of damage is lower, depending on the price.- etc..That's why I said it's not a mistake to buy one of these, but they are no substitute for a benchtop scope (Not even a Hantek).

author: Jack359
author_rank: Contributor
timestamp: September 23, 2024, 05:04:02 pm
content: QuoteI don't have special requirements just curious in what DSO2512G scope is better than Owon HDS242S?Only slightly higher real bandwidth ?I can see that the Owon has a lot better waveform generator and RMS DMM plus bigger display.

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 05:16:01 pm
content: I didn't claim that it was better.I meant that the oscilloscope is roughly equivalent but costs half as much.If the DMM or the signal generator of the Owon is important to you, then the Owon is better.Forget the bandwidth, there is no significant difference.

author: Jack359
author_rank: Contributor
timestamp: September 23, 2024, 05:30:31 pm
content: Quote from: Aldo22 on September 23, 2024, 05:16:01 pmI have crappy 15 bucks DMM on me so the Owon's DMM will be nice to have and surely an upgrade.Not sure about the signal generator but why not when it is only 20 bucks extra than the model without it and looks quite good for portable one.Bigger 3.2 inch screen compared to the 2.4 inch in the DSO2512G also might be nice to have.If the scopes are comparable, it is an easy choice for me.I looked also at the newer DSO3D12 which also has DMM, signal generator (worse one) and 3.2 inch display.Read that it doesn't have fuse on the 10A hole plus it seems that is a lot more buggy than the other 2 for now.So I think I'm going for the HDS242S.

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 05:46:05 pm
content: For me, having everything in one device is not an advantage.If it has to be cheap, I would go for the DSO2512G and this DMM:https://de.aliexpress.com/item/1005007385246818.htmland this AWG:https://de.aliexpress.com/item/1005005756976271.htmlThis AWG has two channels and max. 20Vpp as opposed to the meager 2.5Vpp of the Owon.But if you want everything in one device, the Owon is certainly not bad.

author: Jack359
author_rank: Contributor
timestamp: September 23, 2024, 06:42:46 pm
content: Quote from: Aldo22 on September 23, 2024, 05:46:05 pmI feel that you are 100% right. I will order all 3. Thank you!

author: Fungus
author_rank: Super Contributor
timestamp: September 23, 2024, 06:43:59 pm
content: I quite like those "toy" oscilloscopes. I've got a couple to take with me in my toolcase. It's the ones in between those and the Rigols/Siglents that bother me, ie. the Owons and Hanteks.FWIW I have the same aversion to multimeters between $40 and $100, eg. the UT61E.But I digress...I was just looking for one I saw a few weeks ago on Aliexpress that I quite liked the look of, this one here:https://www.aliexpress.com/item/1005007468578377.htmlBut thenthiscame up in the suggestions, it looks like a brand new model:2 channels, signal generator, touch screen...https://www.aliexpress.com/item/1005006895686506.htmlDon't these guys ever take a break?

author: Atlan
author_rank: Frequent Contributor
timestamp: September 23, 2024, 06:48:32 pm
content: Fnirsi noooooooooooo

author: Fungus
author_rank: Super Contributor
timestamp: September 23, 2024, 06:50:56 pm
content: Oh, the FNIRSI comes with a cute carry case, I'm sold!

author: globoy
author_rank: Frequent Contributor
timestamp: September 23, 2024, 07:03:03 pm
content: The FNIRSI even has a FUNCATION soft button!

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 07:18:44 pm
content: @Fungus: We know these already:https://www.eevblog.com/forum/testgear/another-dsodmm-zeeweii-dso3d12-claimed-120mhz250msps/msg4924738/#msg4924738https://www.eevblog.com/forum/testgear/new-handheld-touch-dso-fnirsi-2c53p-claimed-50mhz250msps/msg5438681/#msg5438681

author: Aldo22
author_rank: Super Contributor
timestamp: September 23, 2024, 07:19:56 pm
content: Quote from: globoy on September 23, 2024, 07:03:03 pmYes, that is a strong argument.I've always dreamed of a Funcation Button.

author: Fungus
author_rank: Super Contributor
timestamp: September 23, 2024, 08:25:49 pm
content: Quote from: Aldo22 on September 23, 2024, 07:18:44 pmProbably, it's not something I look for every week.So the FNIRSI is junk. Pretty, but junk.The Zeeweii looks much better.My $30 'scope is a Zeeweii (DSO154Pro) and it works very well. Only single channel though.I've been thinking about a two channel upgrade but I'm in no particular hurry. I'd prefer something really small because there's not much room in my case (the DSO154Pro is credit card size) and those DSO2512Gs look a bit chunky to me.A 3-in-1 like the Zeeweii DSO3D12 might mean I could leave out the multimeter, or take along a small one. I don't need much of a multimeter at Arduino club.Edit: Just reading the manual on the Zeeweii, it actually seems decent. It also has a good diode test voltage for testing LEDs - essential feature!

author: tunk
author_rank: Super Contributor
timestamp: September 23, 2024, 08:41:09 pm
content: Quote from: Fungus on September 23, 2024, 08:25:49 pmMaybe this:https://www.eevblog.com/forum/testgear/new-$40-2ch-pocket-scope-2mhz50msps-(august-2023)/msg5144487/

author: awakephd
author_rank: Regular Contributor
timestamp: September 23, 2024, 09:07:53 pm
content: I recently got a Zeewei DSO3D12 to replace a DSO154 - main reason for replacing the latter was that I accidentally cracked its screen.If you are familiar with the DSO154, the DSO3D12 will feel very similar in terms of UI - even though it has quite a few more buttons to control its operation. The latter is a good thing, I'd say, increasing the convenience of changing time base or vertical scale in particular. The one thing that was mildly annoying in the UI is how to move up and down in the menu - annoying only because I could find absolutely nothing in the manual to tell how to do it. I had to try various buttons until I finally realized that it treats the column of buttons next to the display as "soft buttons" to select each menu section. Within the menu section, the arrow buttons and OK button work as expected / much like the DSO154.Is it worth the extra $50? Well ... jury is still out on that. I mostly just wanted something portable and battery powered for times when those attributes are needed. Dual channels is definitely a plus for the uses I have in mind for it. An actual case feels like it might be less likely to succumb to damage than the DSO154 proved to be. All in all, I have no buyer's remorse; it's just hard to get as excited about this for $80 when I had something that felt and looked very similar for $30 - albeit only 1 channel, smaller screen, and lower specs.

author: Fungus
author_rank: Super Contributor
timestamp: September 23, 2024, 09:23:39 pm
content: Just watching the Zeeweii videos in this post:https://www.eevblog.com/forum/testgear/another-dsodmm-zeeweii-dso3d12-claimed-120mhz250msps/msg5274556/#msg5274556Imagine you're starting out from zero... it gets you alotof capability for $100 bucks (multimeter+scope+siggen).I like the display of where to put the multimeter cables:

author: Fungus
author_rank: Super Contributor
timestamp: September 23, 2024, 09:33:38 pm
content: Quote from: awakephd on September 23, 2024, 09:07:53 pmYep, menu looks almost identical, but much easier to navigate.Setting timebase and vertical ismucheasier, too - dedicated buttons!Quote from: awakephd on September 23, 2024, 09:07:53 pmSingle channel is a big limitation.This one has multimeter, too. If I could leave the meter out of my case then it could be a win in terms of space. I'll have to make a cardboard model and see the real size.I'm tempted.I'll sleep on it for a few days though...

author: awakephd
author_rank: Regular Contributor
timestamp: September 24, 2024, 06:10:20 pm
content: Quote from: Fungus on September 23, 2024, 09:33:38 pmYes, that is one of the best features / most intuitive parts of the design.Quote from: Fungus on September 23, 2024, 09:23:39 pmAgreed, they did this very well. Even better would be a single set of inputs that are internally switched, but let's not get greedy ...

author: BillyO
author_rank: Super Contributor
timestamp: September 24, 2024, 08:25:56 pm
content: Quote from: awakephd on September 24, 2024, 06:10:20 pmBad idea. Accidently making a poor a mode choice while connected to a strong voltage source or a sensitive circuit could cause myriad problems. They don't keep inputs separate to reduce cost or make things easier for themselves, they do it for (what should be) obvious safety reasons. You may have too much experience with cheap "Smart" meters that do not have current ranges.

author: awakephd
author_rank: Regular Contributor
timestamp: September 25, 2024, 02:42:39 pm
content: Quote from: BillyO on September 24, 2024, 08:25:56 pmBillyO, you are giving me far too much credit. In my case, it is a matter of far too little experience in general. Thanks for helping me to see the advantage of the separate inputs!

author: Fungus
author_rank: Super Contributor
timestamp: September 25, 2024, 02:53:00 pm
content: Quote from: awakephd on September 24, 2024, 06:10:20 pmCurrent inputs are low resistance (passthrough) and have fuses*, that's why they make them separate.Youcoulddo it with shared jacks but you'd need to add internal relays and all sorts of stuff and any bad range selection would blow your fuses.(*) Yeah, I know the 10A range on this particular meter is "unfused".

author: BillyO
author_rank: Super Contributor
timestamp: September 25, 2024, 03:01:03 pm
content: Quote from: awakephd on September 25, 2024, 02:42:39 pmI like to give people the benefit of the doubt.

author: BillyO
author_rank: Super Contributor
timestamp: September 25, 2024, 03:12:14 pm
content: Quote from: Fungus on September 25, 2024, 02:53:00 pmExcept in the case where your meter was hooked up to a small 50ma diode, or tiny transistor or.. something else that would not blow a 600ma fuse before giving it's own life to make yours is more interesting.Also, even if the meter was smart enough to put a 10A fuse in line (not hard to do with a big, brawny relay) when in that mode, it better well be a darn good fuse if it suddenly finds itself across the 415v mains feed in a breaker panel in the UK. Or some other suitably contrived situation (which do occur occasionally).

author: MathWizard
author_rank: Super Contributor
timestamp: January 10, 2025, 10:27:19 pm
content: I'm interested in something like the FNIRSI 2C53T, as a cheap handheld DMM+DSO (the basic AWG is a bonus too, pretty handy for basic audio repair). I gather most of these cheap devices aren't up to the safety ratings, they might advertise.But has anyone modded these to upgrade the input protections? There's not much room in some of them, but others there is.I have 1 of the early DSO138's, (besides my expensive gear) and w/o a case, it was always pretty annoying, and I had no reason to use it.But for a cheap handheld, that's not as expensive as the OWON HDS2000's, how are these regarded ? I'd say for my hobby low-voltage stuff, this should be fine as a field meter.Looking at this video, I think the UI is ok, and it seems ok for upto a 10MHz square-wave, but yeah a bit faster would be nice, for looking at MCU's/etc.This has some FFT function, but it hasn't been worked on enough, or they ran out of room to store the program. Going by that video anyways.I'd really like to see Mike Smith (I hope I got that right, maybe it's Joe Smith) hook this up to his high voltage machines, and see what happens. If I get 1 of these, it would be nice to upgrade the input protections, for household levels, if it's really lacking it.

author: Fungus
author_rank: Super Contributor
timestamp: January 10, 2025, 10:41:31 pm
content: Quote from: MathWizard on January 10, 2025, 10:27:19 pmIf you're regularly going into life-or-death situations then get a suitable device.If not, get a FNIRSI.

author: MathWizard
author_rank: Super Contributor
timestamp: January 10, 2025, 10:55:24 pm
content: No the worst thing I might look at would be a LED/LCD TV or Stereo, maybe a dishwasher. So how bad could their DMM protections really be, has anyone done a real teardown ?Well that's an older or lesser version I think.But how hard would it be to put proper protections on a PCB, and fit it in there somehow. IDK the clearances required for the various voltages, or how much the parts would be, I'm guessing not much. I remember a video of Mr.Smith upgrading one of the Uni-T DMM's to a very high level, I'll have to find that again.

author: tunk
author_rank: Super Contributor
timestamp: January 10, 2025, 11:21:57 pm
content: Another of the cheap ones, PDS833, 1MHz/8.3MSps.From around US$25, but for a similar price, you canget a much better Zeeweii DSO154PRO.https://www.aliexpress.com/item/1005008261777874.html

author: Peabody
author_rank: Super Contributor
timestamp: January 10, 2025, 11:37:06 pm
content: +1 on the DSO154Pro. I don't know about the safety features, but it appears to be head and shoulders above the other single-channel scopes, particularly at the price. Apparently it will do a real 18MHz, and you can even zoom in. :-)

author: Fungus
author_rank: Super Contributor
timestamp: January 10, 2025, 11:42:55 pm
content: Zeeweii is where it's at for 'scopes.FNIRSI is better at power supplies.

author: birdy
author_rank: Newbie
timestamp: January 27, 2025, 01:34:43 pm
content: I’ve paned to buy a Portable Oscilloscope. Not to big and not to expensive.Around 100$ is ok, but max. 150$On my current ListZeeweii DSO3D12DreamSourceLab DS Touch DS4T252...........Does anybody knows wat the better option is?

author: Fungus
author_rank: Super Contributor
timestamp: January 27, 2025, 02:07:15 pm
content: Quote from: birdy on January 27, 2025, 01:34:43 pmI'll go out on a limb and say those are the two.Not much is known about the DreamSourceLab one though, or what the final price will be after it arrives.The Zeeweii can be had for about $75 right now.https://www.aliexpress.com/item/1005007010308820.html(but there's rumors of some old hardware version out there that doesn't support the latest firmwares. Ask the seller what firmware version they run before buying... if in doubt, spend $20 more at the official store)nb. The Zeeweii also has a respectable multimeter built-in.

author: tunk
author_rank: Super Contributor
timestamp: January 27, 2025, 02:09:46 pm
content: Unless you think it's too large, Owon HDS200 series:https://www.owon.com.hk/products_owon_hds200_series_digital_oscilloscope

author: birdy
author_rank: Newbie
timestamp: January 30, 2025, 09:55:59 pm
content: Quote from: tunk on January 27, 2025, 02:09:46 pmThe oscilloscopes from Owon are more expensive than Zeeweii. Do you get more for the extra money from Owon? I don't need DMM functionality, I already have a few DMMs.

author: csuhi17
author_rank: Frequent Contributor
timestamp: February 22, 2025, 09:38:21 am
content: After I managed to get rid of the two Fnrisi, I got a Hantek TO1112 for basic work.Unfortunately, it didn't live up to expectations.important for those who want to buy it.1. Its internal storage became inaccessible, I already updating the firmware, it didn't help.2. It's almost unusable in slower time bases.After setting it, you have to wait a very long time until the wave appears on the display.In scRoll mode, it sets a 4k memory depth.At 1s/Div, 16 seconds, at 100s/Div, 1600 seconds.If I set the memory to 8M, then.At 1s/Div, 32 seconds, at 100s/Div, 3200 secondsI wrote to the seller, he forwarded it to Hantek, but I don't think they'll do anything about it. It's been like this for years

author: tigrou
author_rank: Regular Contributor
timestamp: April 08, 2025, 09:17:01 pm
content: Here is cheap one that you can (probably) add to the list :ETEPON EM001 (the top screen reminds me the DSO2512G, but the comparison stops there).Edit : seems to be a FNIRSI DSO-150 knock off

author: tunk
author_rank: Super Contributor
timestamp: April 09, 2025, 10:25:43 am
content: I think it originally was developed and made by Jyetech (not Fnirsi).And it's not good value at US$25-35.More info, including manual and schematics:https://jyetech.com/dso-150-shell-oscilloscope/

author: tigrou
author_rank: Regular Contributor
timestamp: April 22, 2025, 11:37:15 am
content: After the pocket oscilloscope, here is the palm hand scope :It's probably as cheap and simple as it can be (should be <$20 for the OLED screen + MCU). Probably cheaper than a DSO13This is more a hobby project than a real usable thing. It's based on Arduino oscilloscope project fromhere.

author: Fungus
author_rank: Super Contributor
timestamp: April 22, 2025, 04:31:18 pm
content: Quote from: tigrou on April 22, 2025, 11:37:15 amThe Arduino ADC only works up to ~12.5kHz so usable bandwidth can't be more than about 5kHz.

author: enjoi4283
author_rank: Newbie
timestamp: April 29, 2025, 11:52:58 am
content: Have you considered the Rigol DHO804? It may be slightly out of budget, but as it's PD compatible you can use any decent power bank and then have a "proper" portable oscilloscope. They often go on sale for less than the usual pricehttps://www.lambdaphoto.co.uk/rigol-dho804-70mhz-bw-12-bit-4-channel-high-definition-oscilloscope.html#specificationshttps://www.lambdaphoto.co.uk/pdfs/Rigol/LAMBDA_DHO8000_Datasheet.pdf

author: tigrou
author_rank: Regular Contributor
timestamp: May 02, 2025, 03:02:53 pm
content: Quote from: Fungus on April 22, 2025, 04:31:18 pmWell it's actually way worse than this.I created a simple Arduino program that just read the ADC and send it via serial.Using a python script I read data from the COM port and calculated reads per sec. The best I could get is about 2400 captures per second.It's clearly the serial communication which is limiting factor, it can go up to 7000 reads/sec without it.When you think about it, it make sense. 115200 bauds / 8 bits / 4 (the average amount of bytes transferred per read) = 3600 / sec (theoretical best)There is probably tricks to make this even faster (bypassing analog read and using interrupts), here is an example :https://forum.arduino.cc/t/what-effect-arduino-analogread-speed/978360/15Quote from: enjoi4283 on April 29, 2025, 11:52:58 amYou have to define "cheap" and "portable". That one will definitely not fit in your pocket.Other than that it seems to be a really nice scope for anyone looking for a small form factor. But it's clearly not a pocket one.

author: Fungus
author_rank: Super Contributor
timestamp: May 02, 2025, 05:33:14 pm
content: Quote from: tigrou on May 02, 2025, 03:02:53 pm4 bytes per reading?It's a 10 bit number, 4 bytes is 32 bits - enough to transfer 3 readings.You can make the serial port faster than that, too.

author: tigrou
author_rank: Regular Contributor
timestamp: May 02, 2025, 06:52:17 pm
content: Quote from: Fungus on May 02, 2025, 05:33:14 pmIsn'tSerial.println()converting everything into characters ?

author: Fungus
author_rank: Super Contributor
timestamp: May 02, 2025, 10:03:15 pm
content: Quote from: tigrou on May 02, 2025, 06:52:17 pmYes. ASCII text plus a newline - a huge waste just to transmit 10 bits of data.

author: ledtester
author_rank: Super Contributor
timestamp: May 03, 2025, 02:06:53 am
content: Quote from: tigrou on May 02, 2025, 06:52:17 pmUse Serial.write() to send bytes, e.g.:https://arduino.stackexchange.com/questions/66300/using-serial-write-to-send-a-uint32-t-send-one-byte-x4-or-send-4-bytes-x1

author: tigrou
author_rank: Regular Contributor
timestamp: May 03, 2025, 10:02:25 am
content: Quote from: ledtester on May 03, 2025, 02:06:53 amIt's just me being stupid. I wanted to post about that but you guys were faster than me. I expected the Arduino API to be so "entry level" that I don't even think about possibility to have a method for writing something else than a string.This probably can make serial sending 2 or 3 times faster. I have to try it again.EDIT:With Serial.write(int) (2 bytes per write) I got 4464 writes/sec. I expected something higher. I removed the analogRead() from the loop (thus only doing writes) and it's still the same.Even with start, stop and parity bits, I got 16+3 = 19 : 115200 / 19 = 6063 ops/secI tried to send 200 bytes at once and got 59 writes/sec (which mean 11800 bytes per sec). It's close to the theoretical 115200 bauds / 8 = 14400 bytes per sec.So maybe one way would be to buffer ADC reads and then send it once.

author: ledtester
author_rank: Super Contributor
timestamp: May 05, 2025, 01:38:15 pm
content: Try this code:https://chisight.wordpress.com/2016/03/25/speeding-up-the-adc-on-an-arduino-atmega-328p/

author: Kean
author_rank: Unknown
timestamp: May 05, 2025, 02:26:01 pm
content: Quote from: tigrou on May 03, 2025, 10:02:25 amThe async comms will be your limiting factor. FYI, with 8N1 comms, there are always 10 bit times per byte, so absolute max will be 11520 bytes per sec ... which you can reach only if you can avoid any inter-character delays by keeping the transmit buffers full. You hit this by doing those bulk writes.Async transfers will continue in the background* while you do your next ADC conversion, so I don't think speeding up the ADC will help.(* until the buffer is full and there is a pause, which will screw up your inter-measurement timing a bit)You need to speed up the comms link, e.g. a either higher baud rate or native USB.

author: Fungus
author_rank: Super Contributor
timestamp: May 05, 2025, 10:52:21 pm
content: Arduinos can transmit more than 115200 baud.In practice the capacitance of the sample and hold circuitry of the ADC limits the Arduino to about 12k samples/sec.(You can set the ADC's clock speed higher than that but you won't get useful data)12k samples @ 10 bits can be sent at 230400 baud.

author: Fungus
author_rank: Super Contributor
timestamp: May 05, 2025, 11:11:47 pm
content: Quote from: Fungus on May 05, 2025, 10:52:21 pmOTOH: Any PC sound card will completelydestroythat performance and you can use the Digilent Waveforms software with it.

author: tigrou
author_rank: Regular Contributor
timestamp: May 06, 2025, 11:28:15 pm
content: Quote from: Fungus on May 05, 2025, 11:11:47 pmI read about PC soundcard sometimes ago they have some DC filters (at least one the mic) that make somewhat unusable for anything else than AC signalsDigilent Waveforms : is this official ?

author: ledtester
author_rank: Super Contributor
timestamp: May 07, 2025, 12:42:32 am
content: Quote from: tigrou on May 06, 2025, 11:28:15 pmYes - it's the same software you would use with the Analog Discovery.A blog post about it with some tips for interfacing with real-world signals:https://www.nutsvolts.com/magazine/article/turn-your-computers-sound-card-into-a-scopeCan be used with "internal" sound cards as well as USB sound cards.

author: tigrou
author_rank: Regular Contributor
timestamp: May 07, 2025, 02:44:50 pm
content: Quote from: ledtester on May 07, 2025, 12:42:32 amThanks, but the link to download the software is dead :https://analogdiscovery.com/downloadFrom the article, that's the typical response to expect from a soundcard (as expected) :Probably better than some cheap oscilloscope on some points (sensivity) but worse on some others (forget about any DC measurements).

author: tunk
author_rank: Super Contributor
timestamp: May 08, 2025, 06:17:19 pm
content: New pocket scope, Holdpeak HP-500K- bandwidth 500kHz, 2.5MSps- 10mV/Div - 10V/Div (1-2-5 Step)- 10μs/Div - 50s/Div (1-2-5 Step)- 2.8-inch LCD, 320x240- 400mAh, 3h runtime- 103x73x25mm, 100g- price on aliexpress US$40:https://www.aliexpress.com/item/1005008776106526.htmlhttps://holdpeak-store.com/holdpeak-hp-500k-mini-oscilloscope-portable-handheld-tablet-oscilloscope-with-500khz-2-5ms-s-sampling-rate-2-8-screen/

author: tunk
author_rank: Super Contributor
timestamp: May 13, 2025, 03:46:37 pm
content: New small scope, BSIDE OT3, 1ch, 10MHz/48MSps- 20mV/div - 10V/div- 100ns/div - 20s/div- 3.2" screen, 320x240- 128x63x22mm, 166g- US$30-35 on aliexpress