I came back to watch and give a like. I'm still using the 138, it's getting a battery mod because it finds it way on the bench a lot. The plastic case remains stupid, perhaps some engineering might take effect while doing the battery mod. The JYE Tech is the correct version of this. Good show.
I think this is the only video that goes through the interface. All the others just show people building it, calibrating it, and showing waveforms. Great help as I couldn't get my position cursor to move but now see you have to hold it for a while before it responds.
Wow....this is a really excellent explanation of the use of my oscilloscope. Thank you VERY much...the best i have seen. Now if only i can remember what you have shown me..lol!
Agreed, another useful thing he left out was that if you hold down "switch 4 / OK" when in the vertical or horizontal positioning modes, it will re centre it for you.
I'm ashamed to mention this, but they were supposed to provide a paper sheet with the instructions along with the item. Also, since I have assembled it from a kit correctly, it was kid of self-explaining. But this video can be helpful.
Thank you! The instructions that came with the oscilloscope were a bit confusing for me. It's all new to me. Thanks for demonstrating it. This is a great little device. I can't believe it's only around $20 on ebay.
You are welcome. I am pleased that you found my tutorial useful. Yes, the prices are only high here in Europe and America. In China it is very cheap but I am not sure it will stay that way. Chinese are getting richer every day and once the quality of life goes up, then they demand more and prices will go up may be in 10 years or less.
I actually understood that. So many of these videos are by somebody just messing around and pushing buttons by mistake on my important TH-cam time. LOL. I would definitely need this unit in a case with labels on all those switches and also printed panel instructions.
Thank you Master for the good work you are doing. My question for this tutorial is that: Can i connect this particular Scope to a PC ? if then what is the Software???
you are welcome. This scope does not have the USB option. You can find tones of USB scope on Amazon or eBay or AliEXpress. Please subscribe. I appreciate it and helps my channel grow. Thank you
I wasn't expecting much when I got this and boy was I not disappointed. If ten bucks for an hour or so of soldering, assembly and testing sounds worth it to you then get one of the completely disassembled kits on Amazon. If you actually need a functioning tool this ain't it. Some of the oscilloscopes built on Arduino are light years better.
EXCELLENT video. From watching I think the trigger is not working on my unit. I will check it further. BTW, the "u" in the time base is actually the Greek letter Mu, and in electronics Mu is used to designate "micro". Most people don't have access to Greek letters so they use lower case "u". As in uF for microfarad.
Hi tks for video, can u tell me what is ur 9 v source battery or any adopter. Also how to measure DC volatge( did not show ac/dc mode swich function & USE). My have a 1 khz test sig source,built in also 3.3& 5 v source on board
Just completed assembly of my unit. The LED is not blinking, but the display works well. The instructions are not clear about the Test loop and JP 2 and 4.. Should the test loop be removed and are JP 2 and 4 to be left soldered?
Thanx a lot ..... I bring that 3 weeks ago and i was trying to see the data ...but i can't get it... I was watching that video and i got idea about it.... again thax a lot
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 !
Hello, 1-They are the same. BNC is connector and the other is product from someone 2-Pass the current from a shunt resistor and proportional to the current, voltage shows up and you measure it on oscilloscope . See shunt resistor related video here th-cam.com/video/9jwCc7uPGoc/w-d-xo.html 3-see 2. AC or DC Current can be measured the same way 4-to measure voltage, you need to complete the circuit by connecting + and -. the alligator is the negative and the tip of the prob is the positive 5-On some oscilloscope yes. But not on this. you have to scall it down(making is smaller like twice of 5 times etc) it down so it doesn't burn your oscilloscope. I have provided the datasheet for this oscilloscope in the resources page link 6-1x does nothing. 10x scales the signal down 10 times. Then you to have to oscilloscope that you set at the what scale so it shows proper value 7-See the user manual. Specs are shown robojax.com/learn/arduino/?vid=robojax_DSO138_use bandwidth is 200kHz. Good luck.
Hi, I look at your comments for past 4 days. I don't have the module in hand and I believe there is no harm to connect it and it should power it up. that port is to program the chip as oscilloscope.
Can you measure the frequency of the automotive ignition coil with this device? I am trying to identify the cause of misfire and would like to see whether the coil "fires" equal to RPM/4 However, I am not sure of the actual voltage on the plug - 25kV? I understand, this device should not have any problems with measuring the O2 sensor
The input voltage must be reduced to 10V so you can safely measure it. It will show the waveform time and 1÷Time= Frequency and yes you can measure frequency. For example if a one full cycle is in one box (division) of scree and you read 1µS ( 1 micro second) then 1/1µS = 1000000 or 1MHZ
@@robojax Thank you for the reply. The current in spark plugs is tiny: it's something more than uncomfortable and less than mild pain. My only idea at this point would be to salvage the old induction pick-up from the light timing gun, connect to its 12V light output instead of the bulb and to use 7805. It will not visualise the quality of the spark, but certainly would show the occurrence/frequency of the firing. Many thanks!
Is it normal for these to have a screen which is difficult to look at at any other angle than from the left? Or did I just forget to remove some protective sticker from the display? It doesn't show on the camera, but camera has only one eye and I have two.
@@robojax I have finally had time to check and I've found out that there was no protective foil on the screen (as I had suspected), I peeled it off long ago. There is another film on the screen, but that is glued well and thus it's supposed to be there. It simply is the nature of the display. It's no biggie, I'll get used to it.
the input voltage of this has limit (I know it now but you can see it in video) but you can measure anything. Gain is the ratio of output divided by the input. so you have to measure the input and write it down, the the output and write it down and then divide it using calculator to find out the gain.
i been looking at theses please can one get a video out to hook this to a vga monitor or ?? old tv bigger screen using diy board i understand electronic just do not mess with this stuff much help as i need a bigger screen on this toy
So it seem you have not watched the video. Check the maximum period or frequency this score can measur end then check your laptop or device. If it is less than or equal the specs of this score you can do it. I believe this scope can measure up to 500kHz and laptop has so many different frequencies and it seems laptop is 100 times higher than the capability of this scope.
a transmitter has frequency. this can measure up to certain frequency which I forgot it, if your transmitter is within the frequency range of this scope, yes you can see it. but if you are referring commercial FM radio, then it is it is about 88 MHz to 108MHz. that scope will cost between $800 to $10,000.
my test signal is way up off the top in both DC and AC, i have to slide the signal WAAAAY down near the very bottom to bring it to the middle of the meter. I've tried turning the green adjustment things next to the screen with a screwdriver but they don't do anything visible. did i make a mistake putting it together? how do I fix it? Ground also doesn't seem to do anything?
wow. I am not sure what have you done. it could be potentiometer if there is any have been placed in revers. I am sorry I have made this video long ago and don't remember what I did. Perhaps someone else replies.
may be look at this www.banggood.com/Original-JYETech-15801K-DIY-WAVE2-DSO150-Touch-Screen-Dual-Channel-Digital-Storage-Oscilloscope-Kit-p-1417054.html?cur_warehouse=CN&rmmds=search
I assambled this kit a while ago but I have two problems with it: 1. The green led (Trigged) won't flash like yours. It just blink one time when it boots up and that's it. 2. The SEN 2 switch it shows on the screen that the position is changing but the wave stays the same. The wave doesn't get shorter or longer when I slide the switch.
I checked all the voltages from the manual and they all matched except for V- at TP25 it's measuring -16.38V and I read on a forum that it should be only at about -8V. I was thinking maybe I try to flash a newer firmware but i've been getting an error. I used the ch340g ttl-usb converter and the ft232 which I connected rx and tx in crossover way. Hope I can get this oscilloscope to work and would appriciate any help from your end. Thanks for your convenience.
You will not get anything. you can use 2 wires. One wire from the outer of connector to Ground. then another wire from the center of the connector to the Test point. and you should see signal if you made it correctly.
Oscilloscope can show voltage, frequency and shape of a waveform. it is up to you to use it for whatever purpose you want. Inside mobile device, you can check voltage or waveform of Audio. Bur for example you can't check RF (Radio frequency) of the mobile because it is very high at 800Mhz or 1.2Ghz or higher and for that reason you will need $10,000 to $100,000 oscilloscope.
it shows the voltage as it changes. people use the word "signal" so you view signal. on x-axis you will see the time and on y-axis you will see the amplitude of the signal (or how much) . for example the signal to a speaker is sound wave. you can see it on this (set the speaker volume about 25%). or any other devices.
Hi, perhaps you haven't watched assembly video where I mentioned that we have a signal generated by the his scope. See it here th-cam.com/video/Nc3XQakqgn8/w-d-xo.html and I just added image showing on on this page with user manual and other resources robojax.com/L/?id=243 good luck. please make sure to subscribe.
I think you missed the point about the line at the top of the screen with the thick portion. The whole line represents the whole of the sample taken by the scope on one sweep. The thick portion of the line represents what you can see on the screen. So by scrolling this line you will see parts of the waveform not displayed on the screen but captured before the trigger. Of course using a simple repetitive signal like you did you will not see any new information. But when using the one shot mode on something like a digital I2C signal you should be able to scroll through and see other data that you can't see on the screen.
this is just a tool. Depends on how do you define "dirty electricity". this show change in time (how fast it changes) and amplitude (how much it goes up or down of a signal. It is up you how to use this.
@@robojaxfırstly thank you for the video. Well done!My questions are 1) Can I see harmonic distortions of 50 or 60 Hz AC 2) Can this measure erratic surges & spikes?
yes you can but from what source? you need a microphone to amplify the sound and the output of amplifier can be connected to oscilloscope and you can see live signal as you talk on the microphone. or play something on your phone or other audio device, connect the (spare )headphone jack to the phone and connect other side of the headphone wire to oscilloscope (ground and signal, 2 wires) and you will see the signal
Bought that 2 years ago but never used it as i didn`t know how it works. Now i will be able to use it. Thanks Bro.
You are welcome.
I'm ashamed to mention this, but they were supposed to provide a paper sheet with the instructions along with the item.
I came back to watch and give a like. I'm still using the 138, it's getting a battery mod because it finds it way on the bench a lot. The plastic case remains stupid, perhaps some engineering might take effect while doing the battery mod. The JYE Tech is the correct version of this. Good show.
The best demonstration video on TH-cam. Thank you
I think this is the only video that goes through the interface. All the others just show people building it, calibrating it, and showing waveforms. Great help as I couldn't get my position cursor to move but now see you have to hold it for a while before it responds.
Glad you liked it!
Wow....this is a really excellent explanation of the use of my oscilloscope. Thank you VERY much...the best i have seen. Now if only i can remember what you have shown me..lol!
Agreed, another useful thing he left out was that if you hold down "switch 4 / OK" when in the vertical or horizontal positioning modes, it will re centre it for you.
It's 2020 and I just got one of these and this vid is crucial! Thx!
You are welcome. This oscilloscope will be relevant for 5 to 10 more years.
I'm ashamed to mention this, but they were supposed to provide a paper sheet with the instructions along with the item.
Also, since I have assembled it from a kit correctly, it was kid of self-explaining.
But this video can be helpful.
Thank you. My friend lent me this and you just got me up and running. Great, clear, video.
From all the videos I saw, this is the best about this device .. I will show this to my kids :) thank you !
You are welcome.
Thank you I just learned so much about how to use this thing cant wait to test it out.
You are welcome.
Thank you! The instructions that came with the oscilloscope were a bit confusing for me. It's all new to me. Thanks for demonstrating it. This is a great little device. I can't believe it's only around $20 on ebay.
You are welcome. I am pleased that you found my tutorial useful. Yes, the prices are only high here in Europe and America. In China it is very cheap but I am not sure it will stay that way. Chinese are getting richer every day and once the quality of life goes up, then they demand more and prices will go up may be in 10 years or less.
@@robojax OK, time to buy a few more then...
LOL.
Perfect bro, everything I needed to know
I actually understood that. So many of these videos are by somebody just messing around and pushing buttons by mistake on my important TH-cam time. LOL. I would definitely need this unit in a case with labels on all those switches and also printed panel instructions.
Thank you Master for the good work you are doing. My question for this tutorial is that: Can i connect this particular Scope to a PC ? if then what is the Software???
you are welcome. This scope does not have the USB option. You can find tones of USB scope on Amazon or eBay or AliEXpress. Please subscribe. I appreciate it and helps my channel grow. Thank you
Super informative. Interesting and well presented. Thanks from Orlando Florida. 👍🏽👍🏽
You are welcome. Please subscribe. I appreciate it and helps my channel grow. Thank you
👍. Greetings from Canada.
Wow too, great demonstration. Had mine a few days it is excellent for price . Thanks for posting this, great help.
You are welcome. i am glad you found it useful.
I wasn't expecting much when I got this and boy was I not disappointed. If ten bucks for an hour or so of soldering, assembly and testing sounds worth it to you then get one of the completely disassembled kits on Amazon. If you actually need a functioning tool this ain't it. Some of the oscilloscopes built on Arduino are light years better.
EXCELLENT video. From watching I think the trigger is not working on my unit. I will check it further.
BTW, the "u" in the time base is actually the Greek letter Mu, and in electronics Mu is used to designate "micro". Most people don't have access to Greek letters so they use lower case "u". As in uF for microfarad.
Thank you. and I mentioned it at 2:47 as microsecond. the "mu" is μ not part of keyboard letters and people for convenience use "u" instead.
4:05 SING stands for single-shot capture btw
Thanks
Do you have a square wave genarator to have it?or a source?
Very informative. Thank you.
You are welcome.
Hi tks for video, can u tell me what is ur 9 v source battery or any adopter.
Also how to measure DC volatge( did not show ac/dc mode swich function & USE). My have a 1 khz test sig source,built in also 3.3& 5 v source on board
I just played the video and there is huge switch labeled as GND AC DC. 9V is just 9V does not matter where it comes from.
Thanks for the tutorial. It helped me alot.
You are welcome.
Just completed assembly of my unit. The LED is not blinking, but the display works well. The instructions are not clear about the Test loop and JP 2 and 4.. Should the test loop be removed and are JP 2 and 4 to be left soldered?
Looks like a new version of firmware is available, also an open source version that lets you use 2 signals. Have you updated?
if they release firmware, then everyone will copy this and they will not sell single item. so they will never release it . it is all software.
excellent tutorial thank you,... its given me a good overview of functions and operation to refer back to
You are welcome.
Thanx a lot ..... I bring that 3 weeks ago and i was trying to see the data ...but i can't get it... I was watching that video and i got idea about it.... again thax a lot
You are welcome. Glad it helped
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 !
Hello,
1-They are the same. BNC is connector and the other is product from someone
2-Pass the current from a shunt resistor and proportional to the current, voltage shows up and you measure it on oscilloscope . See shunt resistor related video here th-cam.com/video/9jwCc7uPGoc/w-d-xo.html
3-see 2. AC or DC Current can be measured the same way
4-to measure voltage, you need to complete the circuit by connecting + and -. the alligator is the negative and the tip of the prob is the positive
5-On some oscilloscope yes. But not on this. you have to scall it down(making is smaller like twice of 5 times etc) it down so it doesn't burn your oscilloscope. I have provided the datasheet for this oscilloscope in the resources page link
6-1x does nothing. 10x scales the signal down 10 times. Then you to have to oscilloscope that you set at the what scale so it shows proper value
7-See the user manual. Specs are shown robojax.com/learn/arduino/?vid=robojax_DSO138_use bandwidth is 200kHz.
Good luck.
@@robojax Thank you very much Ahmad for your time. Is it mandatory to use shunts ?
Hi Robojax, just got this unit. Can I use the USB jack/plug located at the mid-bottom of the board to power this unit up?
Hi, I look at your comments for past 4 days. I don't have the module in hand and I believe there is no harm to connect it and it should power it up. that port is to program the chip as oscilloscope.
Can you measure the frequency of the automotive ignition coil with this device? I am trying to identify the cause of misfire and would like to see whether the coil "fires" equal to RPM/4 However, I am not sure of the actual voltage on the plug - 25kV? I understand, this device should not have any problems with measuring the O2 sensor
The input voltage must be reduced to 10V so you can safely measure it. It will show the waveform time and 1÷Time= Frequency and yes you can measure frequency. For example if a one full cycle is in one box (division) of scree and you read 1µS ( 1 micro second) then 1/1µS = 1000000 or 1MHZ
@@robojax Thank you for the reply. The current in spark plugs is tiny: it's something more than uncomfortable and less than mild pain. My only idea at this point would be to salvage the old induction pick-up from the light timing gun, connect to its 12V light output instead of the bulb and to use 7805. It will not visualise the quality of the spark, but certainly would show the occurrence/frequency of the firing. Many thanks!
Hello. the DSO138 oscilloscope has a USB type B plug and I would like to know what its usefulness is. Thank you.
Hello, this can be programmed and the manufacturer is using it to update the firmware.
Will it show clock signals on motherboard for bios ?
different virions of BIOS have different frequency for each manufacturer.
How to generate the square wave?
It has built in square wave on the module , I have shown it . That is to test it. But it should turn on first.
excellent details
سلام خرسندم که مفید واقع شده است. سلامت باشید
Is it normal for these to have a screen which is difficult to look at at any other angle than from the left? Or did I just forget to remove some protective sticker from the display? It doesn't show on the camera, but camera has only one eye and I have two.
this is OLED (O-L.E.D) screen and you should be able to view it from any angle. Yes. Remove the protective sheet.
@@robojax I have finally had time to check and I've found out that there was no protective foil on the screen (as I had suspected), I peeled it off long ago. There is another film on the screen, but that is glued well and thus it's supposed to be there. It simply is the nature of the display. It's no biggie, I'll get used to it.
This seems perfect for setting car amplifier gains. Is it?
the input voltage of this has limit (I know it now but you can see it in video) but you can measure anything. Gain is the ratio of output divided by the input. so you have to measure the input and write it down, the the output and write it down and then divide it using calculator to find out the gain.
i been looking at theses please can one get a video out to hook this to a
vga monitor or ?? old tv bigger screen using diy board i understand
electronic just do not mess with this stuff much help as i need a bigger
screen on this toy
Can we use for check signals in laptop motherboard
So it seem you have not watched the video. Check the maximum period or frequency this score can measur end then check your laptop or device. If it is less than or equal the specs of this score you can do it. I believe this scope can measure up to 500kHz and laptop has so many different frequencies and it seems laptop is 100 times higher than the capability of this scope.
can i check a fm transmitter circuit using this device . what is the maximum frequency which i can check with this ?
a transmitter has frequency. this can measure up to certain frequency which I forgot it, if your transmitter is within the frequency range of this scope, yes you can see it. but if you are referring commercial FM radio, then it is it is about 88 MHz to 108MHz. that scope will cost between $800 to $10,000.
can I measure some high frequency with this oscilloscope?
it says in the specification that it can work up to 200kHz
Can you change the sensitivity and other settings while on Hold?
yes. they all mechanical. But you can't display the change until you return to normal.
@@robojax But if you use the SING trigger mode, you cannot "zoom" the triggered pulse?
my test signal is way up off the top in both DC and AC, i have to slide the signal WAAAAY down near the very bottom to bring it to the middle of the meter. I've tried turning the green adjustment things next to the screen with a screwdriver but they don't do anything visible. did i make a mistake putting it together? how do I fix it? Ground also doesn't seem to do anything?
wow. I am not sure what have you done. it could be potentiometer if there is any have been placed in revers. I am sorry I have made this video long ago and don't remember what I did. Perhaps someone else replies.
For the power supply. Is the center or barrel + ?
I am sorry would you point to the time like 2:35 so I watch it and answer your question? I have done this video long ago and don't remember.
Кто подскажет как подключить прямой вход на X и Y ?
This module only has 1 channel right? Any sugestion if i want 2 channel?
may be look at this www.banggood.com/Original-JYETech-15801K-DIY-WAVE2-DSO150-Touch-Screen-Dual-Channel-Digital-Storage-Oscilloscope-Kit-p-1417054.html?cur_warehouse=CN&rmmds=search
@@robojax that the one i need it sir. Tx u sir 🙏
I assambled this kit a while ago but I have two problems with it:
1. The green led (Trigged) won't flash like yours. It just blink one time when it boots up and that's it.
2. The SEN 2 switch it shows on the screen that the position is changing but the wave stays the same. The wave doesn't get shorter or longer when I slide the switch.
Hello,
1-bad soldering or wrong component
2-see 1
You didn’t reply back to see what you did.
I checked all the voltages from the manual and they all matched except for V- at TP25 it's measuring -16.38V and I read on a forum that it should be only at about -8V.
I was thinking maybe I try to flash a newer firmware but i've been getting an error. I used the ch340g ttl-usb converter and the ft232 which I connected rx and tx in crossover way.
Hope I can get this oscilloscope to work and would appriciate any help from your end.
Thanks for your convenience.
04:03 - [SING] stands for [SINGLE MODE], not SIGNAL.
Thanks
what signal generator were you using- kit?
I have a bench function generator.
hi....i built mine and some reason when the probe is not in im picking up a trace....what could i check? without a probs shouldnt i get nothing?
You will not get anything. you can use 2 wires. One wire from the outer of connector to Ground. then another wire from the center of the connector to the Test point. and you should see signal if you made it correctly.
Robojax what im seeing with no probe attached is a trace that looks almost like a bar code...what could i have done wrong?
Hello, Can I use it for confronte two ware and to take delta t ?
Can I use it for to take data on pc ?
Hi, no pc connection. delta and other calculation can be done with calculator and pin
My unit doesnt have a wave display!
Can i use this device for checking mobile components
Oscilloscope can show voltage, frequency and shape of a waveform. it is up to you to use it for whatever purpose you want. Inside mobile device, you can check voltage or waveform of Audio. Bur for example you can't check RF (Radio frequency) of the mobile because it is very high at 800Mhz or 1.2Ghz or higher and for that reason you will need $10,000 to $100,000 oscilloscope.
Perfect!
Thank you.
nice video, get a nice plastic pointing device tho :)
:) thanks.
Thanks for vedio
You are welcome. العفو
تتكلم عربي انا متابعك من العراق واحبك كثير فيديوهاتك جدا مفيده وانا استخدمها كمرجع عاشت ايدك😘
What is this tool used for exactly
it shows the voltage as it changes. people use the word "signal" so you view signal. on x-axis you will see the time and on y-axis you will see the amplitude of the signal (or how much) . for example the signal to a speaker is sound wave. you can see it on this (set the speaker volume about 25%). or any other devices.
Can you try PWM with it ?
is your question "Can you measure PWM?" then yes.
@@robojax thanks!
You are welcome.
No calibrate or test signal on the board. i don't have a function gen with me.
Hi, perhaps you haven't watched assembly video where I mentioned that we have a signal generated by the his scope. See it here th-cam.com/video/Nc3XQakqgn8/w-d-xo.html and I just added image showing on on this page with user manual and other resources robojax.com/L/?id=243 good luck. please make sure to subscribe.
@@robojax I bought mine preassembled , so no.
Thank you pal!! :-)
You are welcome.
I think you missed the point about the line at the top of the screen with the thick portion. The whole line represents the whole of the sample taken by the scope on one sweep. The thick portion of the line represents what you can see on the screen. So by scrolling this line you will see parts of the waveform not displayed on the screen but captured before the trigger. Of course using a simple repetitive signal like you did you will not see any new information. But when using the one shot mode on something like a digital I2C signal you should be able to scroll through and see other data that you can't see on the screen.
The only works I did not mention is sweep.
can I use this kit to discover dirty electricity in my home?
this is just a tool. Depends on how do you define "dirty electricity". this show change in time (how fast it changes) and amplitude (how much it goes up or down of a signal. It is up you how to use this.
@@robojaxfırstly thank you for the video. Well done!My questions are 1) Can I see harmonic distortions of 50 or 60 Hz AC 2) Can this measure erratic surges & spikes?
Good explanation but try to make representation more impressive
Thank you. Sure I will try.
How much cost of
AliExpress.com check it
Great, you showed everyone how to use 4 buttons what about the rest of it
Good to hear that.
Trigger mode is Auto.Normal and single not signal. Sir you speak single to signal.
LOL. you may be right.
The DSO138 scope tested
➡ Read this article
chinese-electronics-products-tested.blogspot.com/p/dso138-very-cheap-scope-tested.html
ใช้งานไม่ได้
ไม่มีอะไร
why are you using a screwdriver, you are gonna scratch the display
good point.
An expensive mistake at any cost, pure Chinese junk!
But it works.
Will it do 120v ac?
I don’t remember the number but for sure I have mentioned it. DC is does not matter when we talk Peak yo peak voltage.
can I measure sound frequency with this oscilloscope?
yes you can but from what source? you need a microphone to amplify the sound and the output of amplifier can be connected to oscilloscope and you can see live signal as you talk on the microphone. or play something on your phone or other audio device, connect the (spare )headphone jack to the phone and connect other side of the headphone wire to oscilloscope (ground and signal, 2 wires) and you will see the signal
@@robojax What about a car amplifier distortion testing.. Clipping.??