TWT #17: Testing the JYE Tech DSO138

Hello Everyone, I just want to say a big Thank You to all my Viewers and Subscribers, you guys make this all worthwhile!
On this episode I test out some of the functionality of the DSO138 digital oscilloscope from JYE TECH. I use a couple Arduino Unos with simple blink sketches and the M328P Transistor Tester's frequency generator to see how it works.
For the $20 price this kit has been well worth it and it will help greatly with probing the logic of Arduino circuits.

[@jlucasound]

Wow! I programmed mine to do SOS! Also, "shave and a haircut, two bits" and 1-2-3-4 (hold on 4) then off. I have yet to assemble my DSO138, but I will. Thanks for this video. Your subscription level has come up quite a bit.

[@electronmarkboggess63]

I just bought one from amazon after seeing this video..I just need it for basic projects and some basic automotive sensor testing.. thanks for the video very helpful

[@TinkeringWithTerrius]

Thank you for the comment! I'm glad you found the video helpful. The DSO138 isn't as fancy or powerful as a full oscilloscope but it seems to be very decent for basic stuff and the price is much easier to digest! I certainly don't regret buying mine.

[@electronmarkboggess63]

Yes I bought it assembled with the case that I had to DYI.most Automotive signals are low frequency no more then a few hundred HZ on average..so far for $26 its great. I'm provided with $8K Bosch lab scope that's geared torwards automotive use and it works great..But this little $26 catches the signal just as well..however its very sensitive with supply voltage ..I was using a 9V battery that started to die (7.34v) and it caused it to do some crazy stuff

[@battlecoder]

Nice presentation. Was pretty much about to comment about using the trigger, but I saw in the comments that you have that sorted out already. If you haven't updated the firmware of your DSO I advice you to do so. The latest version have several nice features like being able to center the trigger level, and resetting the horizontal window cursor. Will definitely subscribe to your channel. I'm sure your adventures with electronics will be fun to follow.

[@rednassie1101]

16:20 , the reason why 250Khz is about the max reasonable sample rate is because the sample frequency of the device is 1MS/s, this means that at 250Khz it only gets 4 samples per period of a wave. For a square wave this isn't really a problem but for sinusodial waves it is, then you get a blocky wave thing which is okay is DSP usecases, but not when you want to see the wave you're measuring. This is probably the reason why you can't zoom in further.

[@TinkeringWithTerrius]

Thank you for the informative comment!

[@gordselectronicshobby3853]

Try adjusting the trigger to get a stable waveform......

[@TinkeringWithTerrius]

Thank you for the advice, this is my first oscilloscope so I literally had no idea how to set it up correctly. I played around with it for a while after seeing your comment and I think I have the triggering figured out now! I might make a follow up minisode with the stable waveforms, they are much nicer to look at! :)

[@torqueteem2237]

❤

[@alantrail1647]

Love your videos.

[@zaphhood4745]

Your multimeter is expecting sinewave. Hence the error.

[@electricus_aniruddhachanda8184]

Thnx for details video. Sir I go through several video. But yet I did not get its complete specification. Sir can you plz share its complit specification ?? 1st tell me its min. & Max input votage. And min. & Max input frequency. ? Thnx in advance.

[@dand1486]

thanks, very detailed

[@TinkeringWithTerrius]

Glad it was helpful!

[@hichamtassi1753]

Hello, very nice video ! i an new to oscilloscopes and i would like to ask you some questions about DSO138: 1- What is the difference between the BNC and P6100 probe 2- For DC current should i hook to both negative and positive of the component to see it waveform ? 3- For AC current only positive of the probe or both ? 4- What is the purpose of the alligator probe linked to the P6100 ? 5- Can i see the waveform of 220v of the mains ? with which probe ? 6- What is the 1x and 10x of the P6100 probe ? 7- I want to see the waveform of some PWM of PSU ATX rated at 500Khz, is it possible ? Thank you very much !

[@TinkeringWithTerrius]

Thank you for taking the time to comment, I'll try to answer these questions as best as I can, I'm a bit rusty as I haven't been tinkering much with electronics in the last couple years. 1) Both probes are BNC probes, BNC is simply the name of the connector that they use to interface with the oscilloscope. The main difference will be that the included probe is just alligator/crocodile leads and the P6100 is a probe with multiplier adjustment. 2) Yes, an oscilloscope works exactly like a volt meter but instead of an averaged single value in a single instant, it gives you the value over time as a waveform. Therefore you need to connect the leads to the positive and negative in order to produce a waveform. 3) Like with a multimeter you will need to connect the positive to live and the negative to neutral in order to trace an AC voltage. 4) The alligator clip on the P6100 is your negative/neutral connection, rather than be a separate probe it is attached to the P6100. 5) The DSO138 is not a mains rated device, it is not recommended to use it with mains voltage and is only rated for a maximum of 50V. In order to work with mains you would need a mains rated differential probe and a scope with the appropriate safety features. Maybe check the EEVblog for videos about probing mains? 6) 1x and 10x of the probe are the impedance multiplier. The 10x setting will attenuate the incoming signal by a factor of 10, and therefore need to be taken into account as all your measurements will be 10x lower than reality. 7) You would need a scope that can reliably measure 500kHz signals, I personally wouldn't expect the DSO138 to be capable of this. Hope this helps!

[@hichamtassi1753]

@@TinkeringWithTerrius Thank you for your neat and clear explanations. Regards-

[@electronmarkboggess63]

I just bought this (welded) as a fast pocket scope to do fast automotive sensor testing (I have a labscope but just wanted to have a little pocket scope) took it to work today and sampled some signals lamda sensors and MAF sensors seems to work great for the price..my other option was a $400 Uscope

[@TinkeringWithTerrius]

It is certainly one of my favorite bits of cheap electronics gear that I've bought, I got mine un-soldered and really enjoyed assembling it. It isn't the worlds most powerful DSO or the best I'm sure, but it is small and very handy. I just wish there were more, inexpensive, scopes out there with a bit more bandwidth. (Though I have seen JYE Tech has a few other models that I may look into eventually. Thank you for taking the time to comment, sorry my reply took so long!

[@DrexProjects]

Thumb up. Mine scrolls to the left all the time. Is it FKD?

[@dragan3290]

You have now 489 subscribers including me. I have a JYE TECH mini oscilloscope. I used on my 2 way. Since then my screen works. All buttons, reset. Etc. I can't get a signal and digital readout shows negative? Any reply appreciated cheers from Australia

[@HappyHermitt]

I tinker with small electronics. Arduino included. Would this be ok for an Elenco diy radio kit? A scope and audio generator is recommended for fine tuning the radio. I was interested in building one with a Nano but then I saw this kit.

[@xen00x]

Could it be, that you have not calibrated your probes with the green pots like mentioned in the manual? Looks like you need to adjust your corners with these.

[@TinkeringWithTerrius]

Thank you for the suggestion, I did adjust them for quite a while before the video and this was the end result. Any change in adjustment from there made it much worse.

[@Harry001by7]

1. Hissing/ beep sound coming from the device. 2. Test rectangle signal is not flat at peaks (I am using 9v supply from buck module). Any help ? :)

[@anitakol7957]

can I measure over 50v peak with x10 probe? I need any calibration ?

[@wigdoa8986]

I have the same oscilloscope and i have an issue where it constantly displays a voltage even when the nodes aren't attached to anything. Does anybody know how to fix that?

[@DrexProjects]

I bought the kit but it came assembled. Then a kit arrived. I'm scared.

[@Tocsin-Bang]

Sorry to be picky about your Morse. For SOS there should not be a pause between characters, and the long or dah should be about 3 times as long as a short or dit. Otherwise very good video.

[@TinkeringWithTerrius]

Very interesting, I didn't know any of that so thank you for letting me know! I'm glad to hear the rest of the video was good despite that!

[@jlucasound]

Thank You for that Stephen Cook. I made my adjustments arbitrarily in the programming for my Arduino, not really knowing the structure of the pulses. I also need to build my DSO so I can "see" it. I was only "seeing" it with the values I was putting towards the "on" and "off" time. With your info, I have the "math". No pause and about 3X on the long duration compared to the short, being 1X. Excellent.

[@robinsoncruiseoh7668]

how do you like the frequency generator kit? I just built my DSO 138 (dead LCD, working on replacement) and I'm on a big "build all the electronics kits Amazon has" kick....

[@TinkeringWithTerrius]

It seemed to work reasonably well, I only had the DSO 138, my cheap multimeter, and my component tester to test it with. Which of course means I have nothing precise enough to give a good idea of how accurate it is, but I'd say for hobby work it is fine. I can completely understand going on a kit building bonanza, it's so satisfying to assemble something and then be able to actually use it without having to manually program anything!

[@tbyte007]

The multimeter always shows about 30Hz plus. Wonder how could u miss that it's so obvious :D

[@TinkeringWithTerrius]

Huh, never noticed that, thanks for pointing it out! It does seem obvious now in hindsight that the meter has a 30hz offset, though at the time I didn't see the connection.

[@tbyte007]

I saw it at like the 2-nd-3th measurement and was waiting to hear you saying "Oh it's always +30Hz !" to no avail lol . You can add next to the Hz switch sign (+30 !) :D

[@carloshenriquepinheiro4007]

Good morning, I bought an equal already assembled but it came with a problem, when I connect the trace ta in the middle but it goes up and after 5 minutes it went up so much that disappears in the part of sima. Is there anything I can do to keep him from climbing?

[@TinkeringWithTerrius]

Sorry for the delayed response. I'm not sure what would be causing that. My trace line often drifts from the positioning pointer but it is fixed by the vertical position reset. If it consistently climbs I'd guess it is an issue with your unit and you may have to contact the manufacturer.

[@lostinepic]

is thebattery is straith conected to power, or u using the Converter JYE140 ?

[@TinkeringWithTerrius]

In this video I was using the 9v battery directly connected to the DSO. Currently I am using the JYE140 with a 4 cell NiMH battery pack to power it.

[@jacka55penguin]

@@TinkeringWithTerrius I was curious the power is rated at USB or about half that of the 9V cell. I assume the higher voltage wasn't too much for it to handle. I have plenty of phone charger boxes. I guess that should work fine yeah?

[@TinkeringWithTerrius]

@@jacka55penguin for the version of the DSO138 that I used the power requirements are "9V DC (8 - 12V acceptable)". I'm not sure if the newer versions are the same, but best bet would be to check the manual.

[@jacka55penguin]

@@TinkeringWithTerrius Oh ok. I was looking at the "mini" version and it doesn't require 9V. My bad. Cheers!

[@f.m.a5928]

What max voltage and frequency it can measure?

[@TinkeringWithTerrius]

Max voltage is 50Vpk using a 1X probe. Max frequency is 200KHz. Hope that helps!

[@Noxoreos]

@@TinkeringWithTerrius The 200KHz are actually not true, because it starts to measure noise and displays a wrong waveform at 100KHz already. In your video the square wave was already starting to deform at around 20KHz, although this looked like it was partially caused due to wrong probe calibration (using the two pots).

[@lamiaterra9477]

Thumb up for S.O.S. in morse code :D

[@erin19030]

POS !

[@Domenico128Design]

Why you made a video without even know how to use an oscilloscope? That's frustrating

[@TinkeringWithTerrius]

Sorry that you found the video frustrating. I never claim to be an expert quite the contrary, as per my channel description, "I am a newbie electronics hobbyist learning as I go." If you have any advice about oscilloscope use I'd be more than happy to read it!

[@sibandy]

Well, you watched it!