I have added what I have found on the internet in the description. I don't know how reliable the different sources are, so use at your own risk. Some things found since the video: The two "Sen" switches are multiplied to give the volt setting in the lower left corner. Video of the walk around of this o-scope: ruclips.net/video/I5jvzTOeHKc/видео.html $23 Fnirsi-138 Pro Vs. $25 DSO138 Oscilloscopes ruclips.net/video/YNd33BE4WLc/видео.html USB oscilloscope: ruclips.net/video/X9INRscdtOo/видео.html USB Pros & Cons: ruclips.net/video/fcUf1m2hkEs/видео.html
Tour was interesting and helpful as could possibly be! I am a novice / inexperienced with this sort of thing, bought a soldering iron a a few practice kits last month. Saw this old DOS138 on Aliexpress for like, 5 bucks and always wanted an Oscilloscope since 2011! This video confirmed my purchase was a sound one, assuming I dont fry it putting it together!
Thanks for sharing. Do you happen to have the pdf file for this particular version (V1.5)? I have been looking all over the internet for the pdf version. Thanks in advance.
I have it, but legally I can't distribute other people's stuff. The file names I found are DSO138UserManual_138_new.pdf and DSO138UserManual_138mini_HJ.pdf. Note that many companies make this same product, so these manuals may not be for your exact model (they were not for mine), but they are close enough to get 95% of the functions.
@@tsbrownie Thanks. I got a print-outs that came with the unit. I probably scan them (in high resolution) and will save them as a .pdf format. Not as good, but it will do the job. Thanks again.
Hey, nice review. As for the manual, i found them easily. Google censors any direct links, so just give the directions. The footer of official Jyetech site is referencing their official reseller Accudiy. There you can find your model and on your model's page you'll find links to official Jyetech manuals (including calibration procedures) and full schematics etc. (More docs for DSO138mini models than for older DSO138.) Best Regards 👍🏼
Interesting video. I just got my DS0380 today and have been searching for a decent manual online. Most instructional info seems to be several years old, and software changes in the menuing system make it difficult to figure out the current functions. One thing you showed was the SEL action that changes parameters to be adjusted. Your scope goes from what I'd call the vertical position setting (pointer on the left) to the X1 / X10 "probe setting" that would be useful if using a 10X attenuator probe on the scope. Unfortunately, my version skips from the pointer on the left directly to the timebase setting. The X1 legend shows on the screen, but I can't see a way to change it. Anyone else have that issue? Another difference in my software version is that your display shows V1.5 at the upper left, while my screen is blank in that area. The only exception is that occasionally I've seen a red "0 Calib" legend in that field. (I can't remember what condition caused that). Finally, there seems to be a strange condition that occurs sometimes when I first connect the scope after powering it on: the "trace" seems to be completely above the top of the screen until I mess with the vertical position setting. Sometimes this happens; sometimes it doesn't. Anyway, those are the mysteries I'm still trying to figure out. Let me know if you discover anything related to these issues. Thanks again for an informative video!
Interesting, thanks. I wonder if there's 1 company making the hardware and a bunch of distributors putting their own software on it. It happens with big computer hardware.
@@tsbrownie I've read that the original oscilloscope design was pirated by several other companies who now sell knock-offs online, each with their own "features" and peculiarities. I'm not surprised that your DS0380 and mine have different user interfaces, even though they are essentially the same age!
Have spent 2 days looking for your comment. I have the same version as you and can confirm I cant change 1X and 10X probe settings as well as trigger indicator jumps way above screen after reset I think.
I got this to ding around with. I just couldn't resist at $12. My wave forms distort beginning around 30khz. Good for audio work I guess. My main scope is a Tektronix 2246 and old BKP 1477. Yes, This would have been wonderful in the 1970s when I started fixing stuff.
hi, would this be enough to measure audio power output? noob here and i only have multimeter. Kinda went measuring where the amp clips by hearing. Would this be the right tool to see where the Amp wave clip? thank you sir
I know nothing about music, so I can't answer from that standpoint. An oscilloscope measures the change in VOLTAGE over time. So it's like your volt meter, but it graphs the changing voltage. It does not measure amperage unless you buy a special and very expensive probe (I've never had one of those). I would guess (only a guess) that it would see the clipping of the voltage and therefore wave of the amplifier. I don't know how much voltage out that amps produce; most scopes have a limited voltage input limitation.
ok thankyou..but what i mean is check video 02:00 to 02:05... the vrms change value as you changing the switch for sentivity voltage... it that normal?. thats what i want to know :) hope you still answer me :)
@@kenzocanlas1135 This is from their manual (it's also in my description) "[SEN1] & [SEN2] switch: Adjusts sensitivity. The [SEN1] X [SEN2] = actual sensitivity. Displayed at panel lower-left corner." Does that help?
I have a "calibrate analog gain" function... have messed with this? know about what it does? because I ran it and I think I messed something up and I don't know how to revert it...
I am a complete amateur - could this be used to visualize wave forms for sound (specifically for a synth). Could a pass through probe be done easily (with basic soldering skills) to allow an audio signal to go through the oscilloscope?
The lack of a REAL manual is very bad news. Note for novices and near-novices: Whenever you're thinking of buying a device to use with or analyze electronics, find the manual online first and see if it makes sense to you. Equipment won't help you if you can't understand how and where and when to use it. --HOWEVER, JYE Tech does have a (too) short online manual. Search by [dso138 oscilloscope manual]. The current update is "Rev 05" for Revision 05. If you don't know oscilloscopes, see if you can make sense of this manual before buying.
There are better choices these days, but this was a breakthrough back 3 or 4 years ago. BTW, your probe is not properly compensated. It can be done but it's an rather drawn out iterative process. Your happy, so no worries.
The bottom of the case is visible. It's the top that's a problem. The top cover blocks the switches to the left, so only the tip sticks up and switching puts a lot of pressure on the (cheap) switch. It blocks the calibration output on top. And it makes the other switches either inaccessible or hard to use. I will include it next video.
I have added what I have found on the internet in the description. I don't know how reliable the different sources are, so use at your own risk. Some things found since the video: The two "Sen" switches are multiplied to give the volt setting in the lower left corner.
Video of the walk around of this o-scope: ruclips.net/video/I5jvzTOeHKc/видео.html
$23 Fnirsi-138 Pro Vs. $25 DSO138 Oscilloscopes ruclips.net/video/YNd33BE4WLc/видео.html
USB oscilloscope: ruclips.net/video/X9INRscdtOo/видео.html
USB Pros & Cons: ruclips.net/video/fcUf1m2hkEs/видео.html
Tour was interesting and helpful as could possibly be! I am a novice / inexperienced with this sort of thing, bought a soldering iron a a few practice kits last month. Saw this old DOS138 on Aliexpress for like, 5 bucks and always wanted an Oscilloscope since 2011! This video confirmed my purchase was a sound one, assuming I dont fry it putting it together!
Good luck. I have some videos on soldering that might help.
Thanks for sharing. Do you happen to have the pdf file for this particular version (V1.5)? I have been looking all over the internet for the pdf version. Thanks in advance.
I have it, but legally I can't distribute other people's stuff. The file names I found are DSO138UserManual_138_new.pdf and DSO138UserManual_138mini_HJ.pdf. Note that many companies make this same product, so these manuals may not be for your exact model (they were not for mine), but they are close enough to get 95% of the functions.
@@tsbrownie Thanks. I got a print-outs that came with the unit. I probably scan them (in high resolution) and will save them as a .pdf format. Not as good, but it will do the job. Thanks again.
Hey, nice review. As for the manual, i found them easily. Google censors any direct links, so just give the directions.
The footer of official Jyetech site is referencing their official reseller Accudiy. There you can find your model and on your model's page you'll find links to official Jyetech manuals (including calibration procedures) and full schematics etc. (More docs for DSO138mini models than for older DSO138.)
Best Regards 👍🏼
Very interesting. Thank you for this!
Interesting video. I just got my DS0380 today and have been searching for a decent manual online. Most instructional info seems to be several years old, and software changes in the menuing system make it difficult to figure out the current functions. One thing you showed was the SEL action that changes parameters to be adjusted. Your scope goes from what I'd call the vertical position setting (pointer on the left) to the X1 / X10 "probe setting" that would be useful if using a 10X attenuator probe on the scope. Unfortunately, my version skips from the pointer on the left directly to the timebase setting. The X1 legend shows on the screen, but I can't see a way to change it. Anyone else have that issue?
Another difference in my software version is that your display shows V1.5 at the upper left, while my screen is blank in that area. The only exception is that occasionally I've seen a red "0 Calib" legend in that field. (I can't remember what condition caused that).
Finally, there seems to be a strange condition that occurs sometimes when I first connect the scope after powering it on: the "trace" seems to be completely above the top of the screen until I mess with the vertical position setting. Sometimes this happens; sometimes it doesn't.
Anyway, those are the mysteries I'm still trying to figure out. Let me know if you discover anything related to these issues.
Thanks again for an informative video!
Interesting, thanks. I wonder if there's 1 company making the hardware and a bunch of distributors putting their own software on it. It happens with big computer hardware.
@@tsbrownie I've read that the original oscilloscope design was pirated by several other companies who now sell knock-offs online, each with their own "features" and peculiarities. I'm not surprised that your DS0380 and mine have different user interfaces, even though they are essentially the same age!
There really hasn't been an update in construction or firmware since 2016...
Have spent 2 days looking for your comment. I have the same version as you and can confirm I cant change 1X and 10X probe settings as well as trigger indicator jumps way above screen after reset I think.
I got this to ding around with. I just couldn't resist at $12.
My wave forms distort beginning around 30khz.
Good for audio work I guess.
My main scope is a Tektronix 2246 and old BKP 1477.
Yes, This would have been wonderful in the 1970s when I started fixing stuff.
I will have to try it out against my "real" scope and see. Will be interesting.
Hey i have the same one, is it me or the trigger is slow compared to others?
Can't say I've noticed. Will have to check.
hi, would this be enough to measure audio power output? noob here and i only have multimeter. Kinda went measuring where the amp clips by hearing. Would this be the right tool to see where the Amp wave clip? thank you sir
I know nothing about music, so I can't answer from that standpoint. An oscilloscope measures the change in VOLTAGE over time. So it's like your volt meter, but it graphs the changing voltage. It does not measure amperage unless you buy a special and very expensive probe (I've never had one of those). I would guess (only a guess) that it would see the clipping of the voltage and therefore wave of the amplifier. I don't know how much voltage out that amps produce; most scopes have a limited voltage input limitation.
is it normal that the vrms also change if you change the voltage sensitivity ?
How much is it changing? 5% or 50%?
i think its about 5 percent...as youre video shown..changing the voltage divsion the the vrms also change... same as my osciloscope
@@kenzocanlas1135 For the simplicity and cost of the scope, 5% is probably as good as you can expect.
ok thankyou..but what i mean is
check video 02:00 to 02:05...
the vrms change value as you changing the switch for sentivity voltage...
it that normal?. thats what i want to know :) hope you still answer me :)
@@kenzocanlas1135 This is from their manual (it's also in my description) "[SEN1] & [SEN2] switch: Adjusts sensitivity. The [SEN1] X [SEN2] = actual sensitivity. Displayed at panel lower-left corner." Does that help?
The screen with the frequency count, Vpp, and other stuff. How do you bring that up?
I had to go try it. It's the default. You push OK for about 2 seconds. I have a lot of that info in the description.
I have a "calibrate analog gain" function... have messed with this? know about what it does? because I ran it and I think I messed something up and I don't know how to revert it...
I don't have that. Have never messed with it. There's info in the description. Hope that helps.
is changing the PWM and duty cycle only altering the test signal that it outputs?
If I recall, yes. It has a built-in oscillator and frequency generator.
I am a complete amateur - could this be used to visualize wave forms for sound (specifically for a synth). Could a pass through probe be done easily (with basic soldering skills) to allow an audio signal to go through the oscilloscope?
Yes. As long as the input signal is within specs. Audio is easily within the range of this scope.
@@tsbrownie thanks! Will an off the shelf BNC to 3.5mm jack work?
@@theAristocrap It's hard to say without knowing what you are measuring. It likely will work. Make sure the output is not at dangerous voltage levels.
@@tsbrownie Basic headphone audio signal from a synthesizer.
Кто подскажет как подключить прямой вход на X и Y ?
Who can tell me how to connect direct input to X and Y?
The lack of a REAL manual is very bad news. Note for novices and near-novices: Whenever you're thinking of buying a device to use with or analyze electronics, find the manual online first and see if it makes sense to you. Equipment won't help you if you can't understand how and where and when to use it. --HOWEVER, JYE Tech does have a (too) short online manual. Search by [dso138 oscilloscope manual]. The current update is "Rev 05" for Revision 05. If you don't know oscilloscopes, see if you can make sense of this manual before buying.
I have put what I have found in the description. It is from many unknown sources, so I am not sure how good it is.
There are better choices these days, but this was a breakthrough back 3 or 4 years ago.
BTW, your probe is not properly compensated. It can be done but it's an rather drawn out iterative process. Your happy, so no worries.
How bad could the case be? Show us the case.
The bottom of the case is visible. It's the top that's a problem. The top cover blocks the switches to the left, so only the tip sticks up and switching puts a lot of pressure on the (cheap) switch. It blocks the calibration output on top. And it makes the other switches either inaccessible or hard to use. I will include it next video.
How Can I Buy??
ebay, aliexpress
Здравствуйте есть у кого-нибудь прошивка на этот осциллограф на CH32F103C8T6
Hello, does anyone have the firmware for this oscilloscope on CH32F103C8T6