Yet another (toy?) DSO - Fnirsi DSO152, 200kHz/2.5MSps (june 2023) - Page 1
Forum section: electronics / testgear

author: tunk
author_rank: Super Contributor
timestamp: June 02, 2023, 05:54:55 pm
content: - claimed 200kHz/2.5MSps- 10mV/div - 20V/div- 10μs/div - 50s/div- 2.8" screenhttps://youtu.be/jJEhYZWTUGgManual:https://img.wqdres.com/res/0/20230602/87945bfa00f944d8ac97cc9c4d586e45.pdf

author: tunk
author_rank: Super Contributor
timestamp: June 02, 2023, 07:11:59 pm
content: Can be had on Aliexpress for US$ 26-29:https://www.aliexpress.com/item/1005005644784105.html

author: Aldo22
author_rank: Super Contributor
timestamp: June 02, 2023, 07:35:15 pm
content: Could be a DSO-TC2 without the component tester.A bandwidth of 200 kHz doesn't make much sense today, in my opinion.For not much more money you get umpteen times that bandwidth.

author: spacehen
author_rank: Contributor
timestamp: June 04, 2023, 07:07:51 am
content: If possible I would avoid fnirsi, yeapook, hantek, etc and all the other cheap 'junk' brands. These companies have almost no track record of producing accurate test equipment. In addition, most of these manufacturers use the same hardware in their products. If you want new entry level equipment then I would only consider two brands: Siglent and Rigol. Even so I would only purchase products that have had time to mature as bugs usually get ironed out with time and sometimes new hardware revisions are implemented. Of course nothing beats A grade equipment from Agilent, R&S, Tektronix etc but you obviously need some serious $$$ if you want new modern equipment from those brands.For example early models of hantek oscilloscopes could be frozen in under 10 seconds by using the vertical adjustment.I wouldn't trust uni-t personally because they fit rebaged handheld multi-meters into empty plastic boxes and call them "bench multimeters"

author: Aldo22
author_rank: Super Contributor
timestamp: June 04, 2023, 07:32:39 am
content: Quote from: spacehen on June 04, 2023, 07:07:51 amAll right, but this toy costs $26.The price has nothing to do with Rigol, Siglent etc.But yeah, I find it pretty useless too.

author: spacehen
author_rank: Contributor
timestamp: June 04, 2023, 07:45:20 am
content: Quote from: Aldo22 on June 04, 2023, 07:32:39 amWell I personally don't invest into 'toys' nor do I think others should too unless you are a kid with no money, from a failed state, etc. I say this because I've seen yeapook/fnirsi oscilloscopes sell at a significant fraction of an entry level siglent on some stores where I am from (South Africa). Investing into a decent entry level oscilloscope is one of the best things you can do for your education. I am however assuming that we are talking about the casual electronics hobbyist who is eager to learn, not some random joe that wants to measure a thing or two and then throw the scope into the bin.Rather off topic anyways..

author: Boniing
author_rank: Newbie
timestamp: June 09, 2023, 07:57:31 am
content: I ordered the device from the Aliexpress store.Because the device is small and cheap, of course.I need such a device in my work bag, I see that this device is used to view the current sinusoid, in my case it is 220V sin, EU.I had two situations and lost several days searching for the reason for the problem because my new device (PA amplifier) goes into Safe mode.I thought the devices were faulty so I changed a second device, then a third, and they all have the same problem; switch to safe mode during operation.I solved the problem by installing an older generation device and that device works great on the same installation.I think the problem is the sine wave, but I need to check that, and this little oscilloscope would come in handy for that. I will hope.

author: tunk
author_rank: Super Contributor
timestamp: July 09, 2023, 08:31:54 pm
content: A review, looks like it more or less lives up to the specs:https://mysku-club.translate.goog/blog/aliexpress/96607.html?_x_tr_sl=ru&_x_tr_tl=en&_x_tr_hl=no&_x_tr_pto=sc

author: tomud
author_rank: Regular Contributor
timestamp: July 09, 2023, 09:52:46 pm
content: Quote from: spacehen on June 04, 2023, 07:45:20 amYou can see that many people are very rich and have too much money, which is why they like to waste this money on such toys

author: Aldo22
author_rank: Super Contributor
timestamp: July 10, 2023, 09:06:43 am
content: Quote from: tunk on July 09, 2023, 08:31:54 pmHonesty is always nice, but I never suspected that 200KHz and 2.5MS/s was a boast.

author: radiolistener
author_rank: Super Contributor
timestamp: July 10, 2023, 04:22:41 pm
content: there is no sense for 200 kHz oscilloscope. If you want 200 kHz bandwidth you can use usual PC sound card or smartphone, it allows to show you waveform and spectrum with 16-24 bit dynamic range.But 200 kHz bandwidth is not enough even for kids toy oscilloscope.

author: BillyO
author_rank: Super Contributor
timestamp: October 03, 2023, 04:35:15 pm
content: Something like this is fine for a monkey-see, monkey-do kid playing with PICAXE microcontrollers or an Arduino.Quite being such a bunch of TEEs (Test Equipment Elitists).It's far better they spend $30 on something like this and get started in electronics rather than get scared off by the totally unnecessary $300 - $400 expense for an entry level Siglent or Rigol.

author: Aldo22
author_rank: Super Contributor
timestamp: October 04, 2023, 09:18:27 am
content: Quote from: radiolistener on July 10, 2023, 04:22:41 pmQuote from: BillyO on October 03, 2023, 04:35:15 pmI think you're both kind of right.I also think that not everyone needs to start with a $400 device, but this one is just too weak.There are much more usable "toyscopes" for very little more money.One problem with these cheap Fnirsis (I have a DSO-TC2 with probably the same scope part) is besides the tedious operation (among other things) the minimal timebase of 10µs.Actually you can't see the waveform properly even at 100kHz (see attachment, same 100kHz signal for both).Next to it on the image is a Zeeweii, which is available in theone channel versionfor under $60.The Zeeweii is also not a "real" scope for "TEEs", but you can see the difference.For $36, even theDSO154Proismuchmore usable.There are differences even in the world of cheap toyscopes and this Fnirsi just doesn't make sense imo, even for the cheap price.You'd better check your wallet again to see if you can find another $15.

author: BillyO
author_rank: Super Contributor
timestamp: October 06, 2023, 01:52:38 am
content: Quote from: Aldo22 on October 04, 2023, 09:18:27 amI agree. I am testing 4 of these under $40 scopes for a video series. Two of them are FNIRSI (138Pro & DSO152), one is the original DSO138 and the 4th is the Zeeweii 154Pro. There is just no competition. The Zeeweii is in a class by itself .. by a huge margin .. and woluld 100% be my suggestion for the kid that wants an under$40 scope to play with.Edit: I will say that FNIRSI have pretty good support. The first 138Pro I got had a fault that caused it to reset frequently. Without much ado they sent me a replacement. I do call that good support.

author: csuhi17
author_rank: Frequent Contributor
timestamp: October 06, 2023, 06:59:14 am
content: If someone is forced to buy a cheap one, at least buy a usable one.What you can use for a long time and not just throw away.ZEEWEII is not much more expensive, but has much better features and parameters.I have many Fnirsi devices, apart from the oscilloscopes, I am satisfied with all of them.I finally managed to get rid of one of my two scopes, I finally managed to pass it on. I'd be sorry to throw it away anyway.My other scope DPOX180H was more expensive, but usable, I bought it alongside the ZEEWEII as a second pocket scope.Support is useless if the product is not worth the price.

author: Aldo22
author_rank: Super Contributor
timestamp: October 06, 2023, 09:10:51 am
content: To be fair it must be said that there are two things about the cheap Fnirsi that are quite remarkable.(I have the DSO-TC2, but I think the DSO152 has exactly the same scope, not sure).1. it can still trigger a 1kHz sine at 7mVpp, according to my test (However no more reliable automatic measurements).2. it has a maximum time base of 500s. So you can see the measurement of 100 minutes on one screen, if I count that right!

author: csuhi17
author_rank: Frequent Contributor
timestamp: October 06, 2023, 12:04:07 pm
content: You're right, those sound good.I'm sorry, but I can't agree with you.I looked for it, watched several videos about it, but somehow I couldn't find any practical use.You cannot save the waveform, there is no manual measurement option, and many other shortcomings...This could only be good for looking at the waveform below 200kHz, but I don't think it's even for that.I purchased the bluetooth version of the owon CM2100B precisely to test slow signals.I think it's quite cheap compared to what it know, it has offline recording. if it is connected to the phone, you can spend much more time with it.Plus, besides being more accurate, you can not only check the voltage with it, but it is also good for testing the current and you don't need to buy a separate current measuring head, the AC/DC version isn't cheap.on the other hand, I think 2.5 MSa is very little and expensive for that much money, but at least fnirsi didn't lie here and 200kHz is good if I saw it well in the videos.so that you can buy a 500MS speed for twice as much money.