hybridfree/eevblog-posts huggingface dataset:
New Member Introduction - Page 1
Forum section: electronics / beginners

author: Trailing Edge
author_rank: Contributor
timestamp: August 08, 2021, 03:58:57 am
content: HiThis place is interesting. Long-time fan of Dave's videos.This place seems to be the right sub-forum to say "hello" and introduce myself.I'm an aeronautical/mechanical engineer by day, and in my spare time I build a lot of renewable energy projects. I've also built a lot of electronic projects from plans until recently I felt comfortable enough to design things of my own. Mostly these are data-logging devices, based on microcontrollers such as PICAXE and Arduino. In the course of building these I have spent the most development time on tachometers, which are somewhat devilish in wind turbines, for many reasons.Where should I be posting stories and questions about data-loggers and tachometers here?Is "Projects, Designs, etc." the best spot, or does that belong under "Microcontrollers" or "Renewable Energy"?

author: Renate
author_rank: Super Contributor
timestamp: August 09, 2021, 02:34:09 pm
content: Hi Trailing Edge, pleased to meet you.(They do have a special thread for those intros:https://www.eevblog.com/forum/chat/new-member-please-introduce-yourself/)All those three forums would be ok, but I'd vote for Renewable if it's tied to wind turbines.
New Member - Page 1
Forum section: electronics / beginners

author: Electric Al
author_rank: Newbie
timestamp: August 15, 2014, 09:34:18 pm
content: I am a retired electrical contractor , and I now dabble in electronics .I know very little , but I am willing to learn .My other hobbies are model railroading (HO gauge) and small gas engines .I am a member of a few other forums , and I enjoy them , so I decided to try out this forum as well .When I filled in my profile page I could not install my avatar , and I do not know what I am doing wrong .Maybe someone can help me out ?

author: apelly
author_rank: Unknown
timestamp: August 15, 2014, 09:45:57 pm
content: I use gravatar.comOne avatar everywhere. A lot of sites support it natively. Here I just selectedSpecify avatar by URLand pasted a link.

author: liquibyte
author_rank: Frequent Contributor
timestamp: August 16, 2014, 12:22:34 am
content: Click here, choose upload avatar on left and upload browse on right. Of course you can choose from the board defaults as well if you want. Something around 65px × 65px is the limit I believe. Mine is smaller but is based on an SVG and I had to keep it narrow to maintain the aspect ratio at 28px × 65px.

author: nitro2k01
author_rank: Frequent Contributor
timestamp: August 16, 2014, 12:30:10 am
content: Hover profile in the top menu, click forum profile in the dropdown. You should be able to select upload an avatar and select a file from your computer. The uploaded file is subject to some size limit, however. If you already tried that, it would be helpful if you could explain further what happens when you try to set your avatar. Nothing? An error message?
New Motors - Page 1
Forum section: electronics / beginners

author: electromateria
author_rank: Regular Contributor
timestamp: November 17, 2020, 06:00:45 am
content: Thanks to an OG named Richard who's shutting down his workshop (he's retiring) I got these amazing motors. Both for $50!He hooked me up with sooooooo much other equipment too. Such a nice guy.Anyone know anything about Kohlbach company?

author: Jwillis
author_rank: Super Contributor
timestamp: November 17, 2020, 08:23:19 am
content: All I found was a trademark cancellation dated 1997-01-07 . They were made in Brazil up until then . Not much else .

author: electromateria
author_rank: Regular Contributor
timestamp: November 17, 2020, 08:28:13 am
content: Here's a couple other items he sold me:Bandsaw and a 10" monster bench viseI wonder how the bandsaw would respond to a 3HP motor driving itI'm not actually planning to swap motors but just curious.
New Multimeter - What is a "REL operation"? Solved - Page 1
Forum section: electronics / beginners

author: t1d
author_rank: Super Contributor
timestamp: November 27, 2019, 08:43:17 am
content: I have a new multimeter. The specs state:" Specifications are for 4–wire resistance measurement or 2–wire resistance measurement using REL operation"So, what does REL operation mean/stand for?Thank you for your help.

author: t1d
author_rank: Super Contributor
timestamp: November 27, 2019, 08:46:21 am
content: Found it..."REL" is for relative. I need to zero out the leads. No biggee...
New oscillioscope help question - Page 1
Forum section: electronics / beginners

author: jnkirk71
author_rank: Newbie
timestamp: June 21, 2021, 04:22:38 am
content: Hi I have an entry level Siglent scope I purchased a year ago and sparingly used.I have had no problem using 2 probes on one breadboarded audio effect.however whenever I try to compare with another audio effect with its own power supply, one of the probes signals remains visible and the other goes all fuzzy.when I switch between each channel by turning the other one off , it becomes visable.Am I missing something? do i need to do some setting to view an LFO on 2 separate devices?embarrased!

author: bdunham7
author_rank: Super Contributor
timestamp: June 21, 2021, 04:48:25 am
content: What model scope do you have?I think you are looking for a function called "Alternate Trigger" and only a few older Siglent models have that. Without it, unless the two signals have the exact same frequency or are an exact multiple, you can't lock in both signals at the same time. One workaround is to the the "Single" function which will take exactly one snapshot of each signal so that it is clear.

author: jnkirk71
author_rank: Newbie
timestamp: June 21, 2021, 04:52:28 am
content: Oh bugger!It’s a siglent sds1202x-e

author: bdunham7
author_rank: Super Contributor
timestamp: June 21, 2021, 02:42:17 pm
content: That model does not have an alternate trigger feature and cannot be used to view two unrelated or unsynchronized signal simultaneously and continuously. Try the 'SINGLE' button.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: June 21, 2021, 04:22:40 pm
content: Ditto. Here's where you break out the old analog 100 dollar Tek 2213a.... No Honey it's not just a doorstop

author: krzysssztof
author_rank: Contributor
timestamp: June 26, 2021, 06:57:25 pm
content: You may also try capturing one channel, saving reference plot in the memory (it is supported by your scope, "REF" function).Later on you only need to capture 2nd signal and display the previous plot on the same screen.
New Oscilloscope (MSO) need to place order today, need help - Page 1
Forum section: electronics / beginners

author: alexanderbrevig
author_rank: Frequent Contributor
timestamp: March 27, 2015, 09:45:59 am
content: Hi all,I need an oscilloscope urgently and I need to place the order today before the vacation starts here in Norway.These are my options:Owon SDS7102Rigol DS1104BRigol DS2072A-SRigol DS1102DRigol DS1104Z-SI work mostly with microcontrollers, but also some RF and discrete circuits.I had decided for a DS1054Z but it's not available here until well into May and I need the scope yesterday.Currently I'm biased for either the DS1102D, or the Owon plus a logic analyzer.Any input is very much appreciated!- Alexander

author: bitwelder
author_rank: Super Contributor
timestamp: March 27, 2015, 09:52:47 am
content: As mentioned already in other threads, e.g. Batterfly (batterfly.com) has the DS1054Z currently in stock.I bought it from them the other week. Ordered on Thursday, received it Monday morning.

author: alexanderbrevig
author_rank: Frequent Contributor
timestamp: March 27, 2015, 09:55:50 am
content: Quote from: bitwelder on March 27, 2015, 09:52:47 amThanks, I'm buying for my company so I need to get it from our supplier, unfortunately. So then, I'm restricted to the above mentioned options.

author: alexanderbrevig
author_rank: Frequent Contributor
timestamp: March 27, 2015, 02:23:01 pm
content: Ended up with the Rigol DS1102D, I'll probably post here when it has arrived with some first impressions and the like.

author: plazma
author_rank: Frequent Contributor
timestamp: March 27, 2015, 02:37:32 pm
content: Isn't that an old generation model?

author: alexanderbrevig
author_rank: Frequent Contributor
timestamp: March 31, 2015, 10:11:07 am
content: It's arrived!I've never actually used an MSO before but I got up and running within minutes and got to see for the first time that my code is indeed correct. Both with the standard probes as pictured, and with the logic analyzer.Sweet!Quote from: plazma on March 27, 2015, 02:37:32 pmI don't know, but it's probably good enough for my needs anyways (or so I hope)
New Oscilloscope Techtronix OS-245 (AKA 7603) usage - Page 1
Forum section: electronics / beginners

author: electronics-whiz
author_rank: Regular Contributor
timestamp: July 02, 2017, 03:13:33 am
content: So I ended up with this big old Techtronix scope from a coworker, I guess he used for looking at audio signals, hadn't used for a while so gave to me.It turns on I get display, but shows a solid line from about the middle to the right side. I connected a DC motor to it thinking it could pickup the brush ripple, but it just moved the line up and down. I thought scopes were supposed to show a signal from one side to the other and horizontal axis was time. I could never get the left side to display anything. This unit has 2 inputs and some big panel with triggers, etc.This is my first scope that seems to work so I am pretty much starting square one. I could not find any operation manual on htis or it's standard 7603 model. My scope has a tag on it for the US army so appears it was military surplus or retired. If anyone has info on this they can share i'd appreciate it.Thanks.

author: oldway
author_rank: Super Contributor
timestamp: July 02, 2017, 06:16:08 am
content: Congratulations for your new Tektronix analog oscilloscope.Here, you have the user manual.https://archive.org/stream/tektronix_OS-245_P_U/OS-245_P_U#page/n0/mode/2upYou can also download the user manual of the 7603, that's the same.For using the plug-ins, look for the user manual of each of them on Internet.I think the best solution for you would be to look for somebody in your town who knows how an analog oscillscope works and he could check your oscilloscope and teach you how to use it.

author: electronics-whiz
author_rank: Regular Contributor
timestamp: July 03, 2017, 01:19:39 am
content: I have an electrician friend that teaches at the college I work at. Hopefully in a couple weeks when they are in we will be able to get together and look at my scopes. Probably see what they recommend for probes too as the one I have is just a dual banana plug. I don't think I need anything fancy, but I also don't want to screw up and fry the scope somehow. I'd rather blow up a cheap probe than the scope.I have an old tube based heathkit one too, but I think the Techtronix will make that heathkit look like a toy. The heathkit is a good bit less cumbersome though. The techtronix unit is almost like a desktop computer.
new power supply from bg, thoughts ? - Page 1
Forum section: electronics / beginners

author: 10101
author_rank: Contributor
timestamp: June 08, 2016, 11:28:49 am
content: So i just saw in the new arrivals section of Banggood this PS:http://www.banggood.com/0-28V-0_01-2A-Adjustable-DC-Regulated-Power-Supply-DIY-Kit-Short-Circuit-Current-Limiting-Protection-p-1060253.html?cur_warehouse=CNSince there was another one that was discussed here i thought you experienced guys could comment on this new one

author: Audioguru
author_rank: Super Contributor
timestamp: June 08, 2016, 11:40:21 am
content: I know about the problems with the first Banggood power supply that was copied from an old Greek kit but I do not know about this one.

author: mikerj
author_rank: Super Contributor
timestamp: June 08, 2016, 10:54:06 pm
content: Not much in the way of active devices for a PSU with voltage and current control. I wonder if they are doing something really nasty and handling the actual regulation within the micro?

author: ZeTeX
author_rank: Frequent Contributor
timestamp: June 10, 2016, 11:17:51 am
content: Where... where are the op amps?

author: newbrain
author_rank: Super Contributor
timestamp: June 10, 2016, 02:23:57 pm
content: Quote from: ZeTeX on June 10, 2016, 11:17:51 amI suspect it to be a variation of theMCU controlled tuxgraphicsPS...that is to say, not a very sound design.
New power supply - Page 1
Forum section: electronics / beginners

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 06, 2017, 06:37:06 pm
content: Hello, I hope I didn' t post this in the wrong section..Goodmorning, today I have taked an hp 6632A power supply, as my main power supply (I am fixing my other power supply) I have taked it for 160 € and it' s in perfect condition, more less never used, I have maked a deal or I have to regret this choice?Sorry for my englishHave a good day

author: mdszy
author_rank: Unknown
timestamp: June 06, 2017, 06:47:41 pm
content: Sounds to me like you made a pretty good deal. Never used one myself, but from what I'm seeing about them, 160EUR seems like a pretty good deal to me.

author: ZeTeX
author_rank: Frequent Contributor
timestamp: June 06, 2017, 08:18:15 pm
content: Absolutely sexy inside:There is something about through hole components, they look better IMO.

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 06, 2017, 08:31:20 pm
content: My choice was between a hp 3616a 0-35v 0-1.7A for 100 € (in veeery good conditions and tested) and the HP 6632A at 160€ (140 for the psu and 20 of shipping)I don' t know if I have done a good choice bit I hope I'll be happy

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 06, 2017, 08:46:57 pm
content: Yea, is really gorgeous!

author: floobydust
author_rank: Super Contributor
timestamp: June 06, 2017, 10:15:52 pm
content: It looks massive for a 0-20V 5A supply. Very nice12-bit DAC's, 0.1% resistors, 8 pass-transistors, SCR crowbar and moreNote this beast has negative current control - it can sink or source current, which can be a surprise if you ever connect a voltage source/battery to the output with it set to a lower setpoint.

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 07, 2017, 04:46:36 am
content: Woo I didn't know that! Thanks!And another question if I can, I need a new function fenerator, I don' t need of tons of settings and other things like this, my budget is 160€, what can I take? I have check an HP 3314 and it seem pretty advanced, and really good for his price (150 to 350 on ebay, there are many good deal) 20MHz is massive for me, is good for me? I have to make audio test, and to test alternate circuit, nothing for now that need arb and other thing like that.

author: P90
author_rank: Frequent Contributor
timestamp: June 07, 2017, 05:25:08 am
content: Quote from: ZeTeX on June 06, 2017, 08:18:15 pmYes, T-H and juicy leaded solder... none of this SMD RoHS bullshit...

author: floobydust
author_rank: Super Contributor
timestamp: June 08, 2017, 05:25:50 am
content: HP 6632A, 6633A, 6634A Service Manual pdfschematic pg 105/117.

author: Berni
author_rank: Super Contributor
timestamp: June 08, 2017, 05:29:30 am
content: Pretty good deal id say. Its hard to find a PSU of that build quality for such a price.

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 08, 2017, 08:34:45 am
content: I have payed it 130€ including express delivery ahahaI don' t know why, but is good, the auction was closed at 140 without shipping costs ahah
New project idea. - Page 1
Forum section: electronics / beginners

author: BigKahunaFL
author_rank: Newbie
timestamp: April 10, 2023, 02:52:10 pm
content: Hi everyone! I'm glad to have found this group and am hoping that someone here can help me out.I have an idea for a project that I want to build, but I have VERY limited electronic Engineering skills, and I can read/draw schematics. Where is the correct/proper place to ask for assistance with the Engineering aspect(s) of the project?

author: barshatriplee
author_rank: Regular Contributor
timestamp: April 10, 2023, 02:55:10 pm
content: I think you can share it here. Here are many knowledgeable but friendly people who give constructive opinions about projects.

author: BigKahunaFL
author_rank: Newbie
timestamp: April 11, 2023, 11:30:03 am
content: Thanks for looking! I've posted my requirements in the "Projects" section at the following link…https://www.eevblog.com/forum/projects/new-project-status-indicator-wdead-man-switch/THANKS!
New project looking for a particular component. - Page 1
Forum section: electronics / beginners

author: blewisjr
author_rank: Frequent Contributor
timestamp: July 13, 2013, 07:24:09 pm
content: I thought of a really cool project to do with my PIC micro controllers. One thing that has always interested me was EMF (Electromagnetic Fields). Ultimately I would like to build a meter that can measure EMF in a given area. I have done some searching and I can't seem to find a component that can do such a task. I was wondering if anyone knows the name of such a component or is it possible to build my own discrete circuit to get the same results?

author: w2aew
author_rank: Super Contributor
timestamp: July 14, 2013, 03:35:58 am
content: Search for "Field Strength Meter", and you'll find some good starting points.

author: Moshly
author_rank: Regular Contributor
timestamp: July 14, 2013, 06:26:51 am
content: Also have a look at "electric field mill"This looks interestinghttp://saturn.ece.ndsu.nodak.edu/ecewiki/index.php/Group_249

author: blewisjr
author_rank: Frequent Contributor
timestamp: July 14, 2013, 09:35:19 pm
content: AH!!!! Thank you for the research tips was searching for the wrong thing. I will do some research on this now and start designing the project I think this will be a fun one.
New Rigol 1054Z Oscilloscope Dust Cover? - Page 1
Forum section: electronics / beginners

author: BergRD
author_rank: Contributor
timestamp: January 26, 2018, 09:04:00 pm
content: Greetings!Been lurking a while now here and watching Dave's video's now for years but never signed up. Upon doing so got deep and purchased my first new scope since I used a family member's back in the day (I'm 45 now). Due to the wife, kids, pets and a dry and dusty area (farmers plowed fields), it tends to get a bit on the 'dusty' side of things here where I have my bench. Over the years I've been pretty diligent about keeping up on our larger devices like computers, LED TV's etc but dust finds a way. Because I want to preserve as much as I can my equipment I was wondering if there are or if anyone knows, other than making one myself, a place that sells dust covers for equipment such as this scope?I had done my learning on the sewing machine, again back in the day, but likely could throw together something with some scrap material and a machine. While not optimal I see those crafty sheilas on Youtube doing this for all kinds of things like their sewing machines, Cricut cutters, etc. Figured it couldn't be THAT hard with enough time and patience but because my time can mean money; I thought to ask for anything premade prior.I see someone on eBay UK selling one for a Rigol Spectrum Analyser so someone other than me has the idea so asking here.Thanks again for all the great posts, dialog and whatnot here in the forums and to Dave for an excellent series of YouTube.P.S. eBay link (if allowed) to said cover above @eBay auction: #https://www.ebay.co.uk/itm/DUST-COVER-Rigol-DSA815-DSA832-DSA875-Spectrum-Analyser-Digital-Oscilloscope/232614966079?hash=item3628eeb33f:g:B6YAAOSwIWtZ0ijqCheers,~Richard

author: BergRD
author_rank: Contributor
timestamp: January 27, 2018, 02:29:40 am
content: No worries, made my own, lol..Still would be interested in any pre-made ones if anyone has info. Thanks!

author: Electro Detective
author_rank: Super Contributor
timestamp: January 27, 2018, 04:19:24 am
content: Nice work mate, but some thin clear plastic first, then your cover on top should keep most dust issues awayotherwise every time you lift and place back the material on its own, some fine dust gets aroundStitch some clear plastic lining on the inside of the cover and you're setFWIW I use an open carton box as a cover, and I can put light stuff on top when the DSO isn't being used,it's fast, keeps nasties out and the DSO can breath tooHey, welcome to the forum
new Rigol DP832A - Page 1
Forum section: electronics / beginners

author: cyberwasp
author_rank: Contributor
timestamp: April 10, 2025, 02:29:30 pm
content: just bought a Rigol DP832A from amazon for $459. Am playing around with it familiarizing myself with the controls. I noticed channels 1 and 2 read .006v and .004v. Should I be concern since it in the thousands place?

author: thm_w
author_rank: Super Contributor
timestamp: April 10, 2025, 11:30:19 pm
content: Readback spec is +10mV so its within that:https://beyondmeasure.rigoltech.com/acton/attachment/1579/f-01c9/1/-/-/-/-/file.pdfYou can get a multimeter if you have one, and read the actual output voltage and compare.But considering you are never going to use 0V output its not an issue.Try setting it to 10V or 20V and see if its closer there (there are various calibration points).

author: incf
author_rank: Frequent Contributor
timestamp: April 11, 2025, 12:57:31 am
content: I've got one, it's normal. Mine is always is off by -10mV

author: cyberwasp
author_rank: Contributor
timestamp: April 11, 2025, 05:20:55 pm
content: Thank you thm_w, incf. Am used to the cheap $30 supplies that read omv. Just an old fart checking facts

author: bson
author_rank: Unknown
timestamp: April 11, 2025, 06:40:59 pm
content: If you have a suitable DMM you can calibrate it yourself with one of the many scripts posted here in the past. That should bring it to < 0.5mV in most cases, meaning all digits are significant.Edit: oh, and you need a computer and some way to connect it to the PSU, like ethernet.

author: RoGeorge
author_rank: Super Contributor
timestamp: April 11, 2025, 08:05:46 pm
content: Quote from: cyberwasp on April 10, 2025, 02:29:30 pmLet it run for about half an hour to reach thermal equilibrium. If the display is still incorrect, then you may need to re-calibrate your DP832. You'll need an external DMM that can be read from a PC, and a program or a script to automate the re-calibration procedure.Don't try to re-calibrate manually, it's very cumbersome to input hundreds of values manually. The automation might require some programming skills, and some understanding of the PSU internals. The procedure is not very straightforward. Both the output voltage/current and the readings of voltage/current have many calibration points for each channel. Did that once a few years ago:https://www.eevblog.com/forum/testgear/dp821a-calibration/msg3740128/#msg3740128Since then, the readings drifted again a little (no more than 1..2 units), but I didn't bother to recalibrate because in practice the accuracy doesn't matter that much for a power supply.
New Rigol User Question - Page 1
Forum section: electronics / beginners

author: LewisRRX
author_rank: Newbie
timestamp: February 25, 2019, 10:35:10 pm
content: Hi Folks, just got my new and first oscilloscope, a Rigol 1054Z.I've run through the probe compensation for all four channels and noticed that whilst channels 1,2 and 4 stay at a steady 1Khz, channel 3 wavers a little from 1Khz to 998Hz. I've swapped out the probe and done a little testing and it seems to be the channel rather than a faulty probe.Question is, should I be concerned, is this an issue? I just don't know!Many thanks and cheers!Lewis

author: ataradov
author_rank: Super Contributor
timestamp: February 25, 2019, 11:45:50 pm
content: I would say it is normal. that 1 kHz signal is not precisely calibrated, so it is possible that other 3 channels are off, and this one is spot on.Try moving the trigger level too, see if it makes any difference.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: February 26, 2019, 06:41:31 am
content: A man with a watch knows what time it is. A man with two watches is never really sure.Still, it might be a useful exercise to let the scope warm up for 30 minutes then run the self-cal routine, and then test to see if CH3 settles down and marches in line with its buddies.

author: LewisRRX
author_rank: Newbie
timestamp: February 26, 2019, 06:03:29 pm
content: Many thanks for the replies chaps, I have done the self calibration today but it's still the same.I suspect that it doesn't really matter, especially for the simple hobbyist type use I'll be subjecting it to, it's just a bit annoying!It stays on 1Khz for most of the time and just flashes fleetingly to 998Hzso I guess it wouldn't have an important effect on a real life measurement.Thanks again, any more advice and suggestions gratefully received!CheersLewis

author: ataradov
author_rank: Super Contributor
timestamp: February 26, 2019, 06:06:43 pm
content: Scope frequency measurement is not very accurate no matter what. It is there to give you a rough idea of what the frequency is at a glance, nothing more.
New Rigol - Page 1
Forum section: electronics / beginners

author: Mukrakiish
author_rank: Contributor
timestamp: November 18, 2016, 05:24:03 pm
content: I have no-one else to share this with that would care/understand except you guys so...After fighting with my Tek 7613 for over a month (purchased to learn electronics with) that is out of cal and has some minor issues of proper function, I broke down and got a Rigol 1054z that will work for the hobby and to fix my 7613. I'm so excited! I can'tbelievehow many bits are in this digital scope. Oh my gosh!Early Christmas present to myself. So excited! Got plans to get a Lambda Triple Output vintage PSU for the lab as well, looks quite solid and has all 6 gauges!Anyway...thanks for listening. Have a good one! You're all amazing.

author: ProBang2
author_rank: Frequent Contributor
timestamp: November 18, 2016, 05:49:05 pm
content: Congratulations!Have a lot of fun with your new tool!It is a versatile little device.I am sure: Sometimes you will be impressed, what this "Hobby/Beginner" oscilloscope is able to do.And it is allways nice to have 4 channels...

author: danadak
author_rank: Super Contributor
timestamp: November 18, 2016, 11:49:57 pm
content: Keep the 7613. With many varied plugins its till quite useful andflexible. Online you can find scanned copies of old Tek catalogs,and see all the specialized plugins, like samplers, high gain diffplugins, counters, spectrum.....http://www.tek.com/Measurement/Support/scopes/faq/history.htmlRegards, Dana.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: November 19, 2016, 02:47:38 am
content: I have been playing with a lot of older scopes lately. There is much to like about them, including a generally simpler and more intuitive interface. But I am finding the compact size and very light weight of my Rigol very appealing. When a measurement is out of reach of the scope probes it is really easy to move the scope, and doesn't require putting on a lift belt.Not all of the appeal of these things is in the broad functionality.

author: Mukrakiish
author_rank: Contributor
timestamp: November 21, 2016, 02:35:31 am
content: I agree with you guys, I plan to repair the 7613, it's not that far out. But I really did need a solid 'reference' to know if my time mark generator and function generator are on point enough to reset my 7613. It certainly has some power to it that this scope doesn't. Interesting to know that sort of thing.I've learned so much from just trying to learn the whole "scope" if you will, of what is involved in the mainframe series.
new scope, need probes  - Page 1
Forum section: electronics / beginners

author: Flump
author_rank: Frequent Contributor
timestamp: October 19, 2013, 02:46:14 pm
content: Hi allJust purchased my first scope off ebay, its a cheap low spec oneand doesnt come with probes, i am not going to be doing anythingimportant with it, its just for experimenting and playing with atbeginners level, going to use it for developing mic preamps andbasic stuff like that.is it worth the extra for me to get decent probes or is it okay forto get a pair of cheap probes for the stuff i plan on doing with it ?

author: Caca
author_rank: Contributor
timestamp: October 19, 2013, 03:18:22 pm
content: Hi, I think taht even the cheapest probes should be fine if you don't want any high frequencies

author: G7PSK
author_rank: Super Contributor
timestamp: October 19, 2013, 03:26:07 pm
content: Those cheap probes work very well for anything under 50MHZ and can be had from Ebay very cheaply I get the sets of four for under £20.00 including shipping, they are cheap enough not to worry about damaging the tips etc. I also fixed a set to 10 X and fitted identification pins so that they would switch my scope to the correct reading I have another pair set to 1X with pins on them as well I just put some supewr glue on the switches so mistakes are not made.

author: npnlamp
author_rank: Contributor
timestamp: October 19, 2013, 03:30:42 pm
content: Get cheap ones, I dont think you need high frequency ones. Cheap set of probes on ebay:http://www.ebay.com/itm/40MHz-Oscilloscope-Scope-Crocodile-Alligator-Clip-BNC-Connector-Probes-Max-600V-/180738642983?pt=LH_DefaultDomain_0&hash=item2a14dcd427What scope do you have? What frequency it is?

author: Flump
author_rank: Frequent Contributor
timestamp: October 19, 2013, 04:48:19 pm
content: thanks very much guys, I will get a cheap set then.here is the scope I got incase anyone is interestedhttp://www.ebay.co.uk/itm/111187493856?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649I think I will get these probeshttp://www.ebay.co.uk/itm/370890121183?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

author: G7PSK
author_rank: Super Contributor
timestamp: October 20, 2013, 09:37:00 am
content: You wont go wrong with those.

author: KJDS
author_rank: Super Contributor
timestamp: October 20, 2013, 11:30:34 am
content: I've got four of those probes, they are good value.
new setup for workbench suggestions. - Page 1
Forum section: electronics / beginners

author: krappleby
author_rank: Contributor
timestamp: January 04, 2017, 10:35:37 am
content: Hi guys,I'm Keith looking to get fully immersed into electronics once again (I did many years ago as a 17 year old, and at the time built a simple but effective house alarm system, that is still used today) and I'm looking to set up a new workbench, and was wondering what suggestions would be best for the setup, Oscilloscope, power units etc.. IM looking to spend around 1000 max, for the full setup..Your suggestions would be greatly appreciated.. (ps.. the 1000 is just for the bench not for the electronic components.. ) I would like suggestions on software etc, too, I have a laptop which is pretty new, and will be used for deisgn, just need some decent software to use with it.. and tools.. Feel free to post ebay links, or amazon links etc.All suggestions appreciated..I am looking to create a couple of circuits.the first one (I am a ghost hunter) is a EmF recorder, (sound based). I want to create a small device, that using a emf receiver can both receive and send EMF signals and at the same time send that signal to a sound recorder and my headphones.. I'm assuming that I would need to place some sort of amp on the feeds, but I will look into that later..anyway, look forward to your suggestsionsPS>> KEEP UP THE GREAT WORK EEVBlog..

author: TheDane
author_rank: Regular Contributor
timestamp: January 04, 2017, 11:48:58 am
content: Try searching the forum, there are lots of posts similar to yours - with tons of feedback.Dave even did a couple of YouTube videos on the topic:...https://www.youtube.com/results?search_query=eevblog+lab+setup
New Siglent SDS1202X-E oscilloscope concerns - Page 1
Forum section: electronics / beginners

author: Gallium
author_rank: Newbie
timestamp: April 30, 2021, 09:01:46 pm
content: This is my first time owning or even using an oscilloscope and I had a few concerns. I am attempting to compensate my probes.I have been watching some videos others have made and their square waves seem a little more square than what I can get. The square wave in the attached images is about the best I can do by adjusting the trimmer on the probe. Any further adjustment just makes it worse. Is this normal or does it indicate a problem with my probe or scope?Also a few other oddities are that unlike every other video I've seen of this model, the power button on mine doesn't pulse when the scope is plugged in but turned off. That could be because I have a newer firmware (1.3.26) but I found it odd. Also the "Certificate of Calibration" has an obviously computer printed signature and "QA Pass" stamp. On other people's videos it looks more like an actual stamp. Should I be concerned? I just want to make sure I don't have some kind of fake or reworked oscilloscope.

author: Electro Fan
author_rank: Super Contributor
timestamp: April 30, 2021, 10:19:24 pm
content: I know you said you watched some videos but just to make sure, here is one more to check off the basic boxes.Normally you should be able to square up the corners a bit more than what your images show.Are you using a Siglent-provided adjustment screwdriver? Sometimes it's just a finicky adjustment.

author: tautech
author_rank: Super Contributor
timestamp: May 01, 2021, 02:36:03 am
content: Welcome to the forum Gallium.Yes compensation can be tricky to get perfect and when you do taking away the screwdriver will often change it slightly however with a little practice you can compensate for this. Compensation at 100us/div is easier to get it more perfect.You Cal cert is real if it lists all the instruments used to cal your scope and its SN#Another tip if I may, use the blue Print button to save directly to a USB drive.

author: Vovk_Z
author_rank: Super Contributor
timestamp: May 01, 2021, 05:28:54 pm
content: Quote from: Gallium on April 30, 2021, 09:01:46 pmYour compensation is not ideal, but in general - is 'good enough for Australia'.

author: v11
author_rank: Newbie
timestamp: May 01, 2021, 06:50:06 pm
content: @Electro FanThank you...Very constructive.BR

author: Electro Fan
author_rank: Super Contributor
timestamp: May 02, 2021, 03:25:18 am
content: Quote from: v11 on May 01, 2021, 06:50:06 pmThx v11, you are welcome.And welcome to the forum(s).
new soldering station, hakko fx-951vs jbc cd-2SE or DIR-2D - Page 1
Forum section: electronics / beginners

author: pagu
author_rank: Newbie
timestamp: November 17, 2016, 06:14:30 pm
content: Hello everyone,i am looking for a new soldering station, after looking around other operators i am undecided for this models:hakko fx-951 plus micro tool FM 2032-52 (376,00€ + 124,00€)orJBC CD-2SE with tool t-210a (391€)JBC DIR-2D with tool t-210a (589€)all versions are at 220V. (the hakko 220v here in Europe it's very expensive)My sector: soldering and microsoldering, smartphone and tablets tech repairI like jbc because i bought a JT hot air, but i sow that the Hakko have a lot kind of tips.help me plese.Thank you.Al.

author: neo
author_rank: Super Contributor
timestamp: November 17, 2016, 07:05:36 pm
content: Take what i say with a grain of salt, but i would go with the hakko your sector is the same as this guyhttps://www.youtube.com/user/rossmanngroupmore or less and thats what he uses. Thought ultimately the choice just comes down to whichever YOU like better getting a hakko for its tips is as valid a reason as going with a brand you like, at least when it comes to hakko VS jbc.

author: GreyWoolfe
author_rank: Unknown
timestamp: November 17, 2016, 10:18:30 pm
content: I would say to go for the Hakko, but I am biased as I have one. I also have a Metcal MX-500. I do use and enjoy them both. I can't speak for the micro handle as I don't have one.
New soldering station or pencil for Pace PPS15A - Page 1
Forum section: electronics / beginners

author: Jaimo
author_rank: Newbie
timestamp: September 29, 2013, 01:42:55 pm
content: I have a 30+ year old Weller Iron powered off a 24V transformer and this has served me well for the through hole work I've always done.I am now doing more and more SMD hand soldering and believe it is necessary to replace my Weller set up.I have a Pace PPS-15A station (without an iron) but can't decide if I should just pick up a pencil for this unit or, buy a complete Hakko of similar station.The volume of information and price range is overwhelming.Any recommendations?

author: Fraser
author_rank: Super Contributor
timestamp: September 29, 2013, 02:36:11 pm
content: I am a PACE fan so have a lot of PACE soldering/desoldering kit. PACE is an expensive brand when bought new and the soldering tips are very expensive as you tend to have to buy packs of 5I have used e*ay to source new and used PACE kit and often buy individual tips for around GBP4 ($6). I did find some new PS90 hand pieces for GBP30 ($45) including a quality stand but that was a very good bit of luck as they are very expensive normally.I would recommend buying a complete used base station and hand piece sets as they are more common than spare hand pieces. You can likely buy a complete HAKKO for the cost of just the PACE hand piece.I am biased as I like the quality of my PACE kit but in your case I would suggest that that a used PACE set or a new HAKKO would be the way to go. I bought a new complete PACE soldering staion and hand piece for only GBP40 ($60) so they do come along at good prices. Remember the cost of the tips is high though.
New technique to solder the QFN chipset or it's just a failed soldering? - Page 1
Forum section: electronics / beginners

author: kamcm
author_rank: Regular Contributor
timestamp: August 10, 2018, 11:18:06 am
content: My 5 bay HDD enclosure works for 3 months and suddenly stop working, so I decided to take it apart and fix it.But I found out somethings odd with the QFN chipset.The QFN chipset is surrounding by solder ballIs it some kinds of new technique to solder a QFN chipset or it's just a failed soldering.http://kamserver.com/upload/2018-8/towerraid.jpgPlease let me know,Thanks!Kam

author: Howardlong
author_rank: Super Contributor
timestamp: August 10, 2018, 11:43:08 am
content: Not the best, for sure.It could certainly do with flux and a reflow.I had some application specific QFN parts a few years ago that were hard to wet and solder, part of it was the pad finish itself and part was that the pads weren’t continuously wrapped around the edge, there was about a 0.15mm of package plastic on the edges. It was hard to achieve a good looking joint as a result.

author: wraper
author_rank: Unknown
timestamp: August 10, 2018, 11:55:04 am
content: I don't think there is anything wrong with it. Most likely it happened because of the package itself. Exposed metal on sides seem to be somewhat elevated from the bottom, therefore solder did not attach with it. Not that it affects anything as actual pads are under the chip.

author: TomS_
author_rank: Frequent Contributor
timestamp: August 10, 2018, 02:33:25 pm
content: I dont think that is a new technique. Just dodgy soldering.Solder should form a fillet, not a ball. Thermal expansion and contraction, potentially even vibration, will wreak havoc with those joints over time leading to unreliability, which you are now experiencing.Probably its a combination of poor quality solder, poor reflow profile, tarnished pads on the package, perhaps because they havent been stored or handled properly or maybe because they are counterfeit and thus substandard manufacturing quality. If its a cheap item, its no wonder really.

author: wraper
author_rank: Unknown
timestamp: August 10, 2018, 03:46:14 pm
content: Quote from: TomS_ on August 10, 2018, 02:33:25 pmSolder fillet won't form to something where is no metal or it was not tinned at factory. This is punched QFN or even has PCB substrate on the bottom and plastic on top. And terminals likely are similar to the picture.

author: helius
author_rank: Super Contributor
timestamp: August 10, 2018, 03:50:23 pm
content: First thing to check on HDD enclosures is the power connector if it is PCB mounted. They can get a lot of force applied and it can break the PCB traces.

author: KL27x
author_rank: Super Contributor
timestamp: August 11, 2018, 01:37:43 am
content: I looked at that pic and came up with nothin... if those are badly flowed joints, the heck it ever worked. (And awesomely easy fix for the OP). Wraper's response makes the only sense.

author: Bud
author_rank: Super Contributor
timestamp: August 11, 2018, 02:11:59 pm
content: Look at the resistors in the top left, they also appear to have balled solder. Could be old solder not wetting the pads well.
New Tenma 72-10495 Benchtop Supply - odd noise when turning on - Page 1
Forum section: electronics / beginners

author: banedon
author_rank: Regular Contributor
timestamp: July 08, 2015, 03:38:00 pm
content: Hi guysThis may seem like a really silly question, but should you expect an odd twang noise from inside the case when the unit is turned on. It sort of sounds like someone vibrating a ruler off the side of a desk. Or possibly like an old CRT monitor degausing. Doesn't always happen, though.As you can tell, I've never owned a proper benchtop power supply.

author: banedon
author_rank: Regular Contributor
timestamp: July 08, 2015, 03:41:25 pm
content: Is it possibly dumping power from the PSU capacitors? Seems to happen on the second or htird time you power the unit up if within a few seconds of being turned off.So :Turn it on - okTurn it offTurn it on with a few second - odd noiseTurn it offTurn it on with a few second - odd noise, but possibly more pronounced

author: GreyWoolfe
author_rank: Unknown
timestamp: July 08, 2015, 06:34:02 pm
content: I have a couple of Astron 35A linear power supplies for ham radio equipment. Both of them make a "twang" when turned on, whether or not there is a load attached. Both work just fine. I might check one on the DSO just to see what happens when the supply turns on. Unfortunately, I have work related things to do before I can clear the workbench.

author: mikerj
author_rank: Super Contributor
timestamp: July 08, 2015, 09:22:08 pm
content: It may have a PTC in series with the transformer primary to reduce the inrush current. Switching it off and then back on again quickly will defeat the protection the PTC gives as it won't have had time to cool down sufficiently. Inrush currents can be very high, and the strong magnetic fields produced can be enough to make the transformer noisy.
New testing - Anti-static wrist straps no longer needed.. - Page 1
Forum section: electronics / beginners

author: Cliff Matthews
author_rank: Unknown
timestamp: December 22, 2020, 07:02:24 pm
content: Well, at least for some people!YMMV Happy holiday's folks!

author: Andrew LB
author_rank: Contributor
timestamp: December 31, 2020, 04:34:01 pm
content: I find watching Linus getting electrocuted strangely satisfying.I've been building computers since the 486 and never used a wrist strap and have never killed a component due to ESD.
New to electronics, power supply build. - Page 1
Forum section: electronics / beginners

author: beretmaster
author_rank: Newbie
timestamp: June 23, 2014, 09:59:25 am
content: Hi there, I am just getting into electronics and I had a poke around for a good starter project and came across this LM317 adjustable power supply. My question is about the capacitors, what is the function of the 0.1µF and 0.22µF capacitors? I have seen a few tutorials on similar power supplies and I only see the input and output capacitors in those tutorials.

author: firewalker
author_rank: Super Contributor
timestamp: June 23, 2014, 10:10:03 am
content: This device in order to "regulate" needs a feedback network (220R, 5k pot). Due to the feedback action the circuit has the tendency to oscillate. Adding capacitors stabilizes the circuit. Someone could say that the capacitors acts like a path to the ground for the ac components created by the oscillations.Alexander.
new to erpom programming - Page 1
Forum section: electronics / beginners

author: JohnDX9
author_rank: Newbie
timestamp: May 07, 2014, 12:47:19 pm
content: Hello, I have a project where I have to send a .bin file to a 29c256 chip. Never done anything like this before. Saw a USB TL866CS Programmer on ebay. would this work?

author: Chris_PL
author_rank: Contributor
timestamp: May 07, 2014, 03:31:58 pm
content: If it is a one-off thing and programming speed doesn't matter I'd consider breadboarding a simple circuit with a favourite MCU flavour. Then simply receiving data via RS232/USB-to-UART and bit-banging it to the memory chip (with correct voltage shifters as necessary). If you're not dealing with such stuff on a daily basis, buying a proper programmer just to "flash" a single chip will probably add another dust-collector to your shelf. IMHO of course.

author: Kappes Buur
author_rank: Regular Contributor
timestamp: May 09, 2014, 06:47:43 pm
content: http://stores.ebay.ca/EPROM-Programmer/Feature-Products-/_i.html?_fsub=5&_sid=101150119&_trksid=p4634.c0.m322

author: kingsitworld
author_rank: Newbie
timestamp: June 11, 2014, 03:54:26 pm
content: HiI am new to tl866cs. i got a error tl866cs. i posted the error screen.Chip: 25x40vsigkindly help me.Adv. Thx for replyvelraj

author: jinzo
author_rank: Contributor
timestamp: June 11, 2014, 05:13:44 pm
content: I don't have that much experience, but I would guess that your contact/pins are not OK.
new to esr readings - Page 1
Forum section: electronics / beginners

author: Flump
author_rank: Frequent Contributor
timestamp: June 08, 2014, 09:51:17 pm
content: I just got an ESR meter a few days ago and I have an old hi fi ampwhere the smoothing caps have leaked and made a big mess over the boardmy ESR meter reads 9973 uF @ 0.06 ESRthe peak-atlas chart says it should be around 0.01 ESRIs that a large enough difference between readingsto ascertain the cap's are faulty ?

author: madires
author_rank: Super Contributor
timestamp: June 08, 2014, 10:06:46 pm
content: No, it's ok. A smoothing cap for 100Hz doesn't need to be a low ESR type anyway. If the value is within an order of magnitude that's fine for a standard cap. But when it's much larger I'd replace the cap.

author: Flump
author_rank: Frequent Contributor
timestamp: June 08, 2014, 10:08:28 pm
content: thank you madires

author: Matje
author_rank: Regular Contributor
timestamp: June 08, 2014, 10:09:41 pm
content: Quote from: Flump on June 08, 2014, 09:51:17 pmNo.But the caps having spilled their guts is a perfect indication that you should replace 'em. I would have thought that to be somewhat obvious? ;-)

author: Flump
author_rank: Frequent Contributor
timestamp: June 08, 2014, 11:34:35 pm
content: Yep I realise they need to be replacedI am having problems finding replacements though.

author: liviuo
author_rank: Newbie
timestamp: June 09, 2014, 08:03:24 pm
content: Hi, ESR values seem ok for an old cap of that 10.000uF, but if there is clear sign of leakage the change is necessary. But sometimes the old glue used for mechanical rigidity gets all brown and looks like electrolyte.

author: KJDS
author_rank: Super Contributor
timestamp: June 09, 2014, 08:08:20 pm
content: I need new glasses, I read the title as "new to ear readings"

author: Fank1
author_rank: Regular Contributor
timestamp: June 09, 2014, 08:14:35 pm
content: Looks more like glue that "spilled guts", value and esr readings don't compute with "spilled guts" either.