in this project I want to show you how to make an easy and cheap USB Oscilloscope.

Price: 20$
Frequency: 2-20000HZ
Resolution: 16 Bit
Voltage range:  +-7V / with probe +-70V
Channels: 2
X-Y Mode
Signal generator: Sine, Square, Triangular and Sawtooth 0-20000Hz

Step 1: Material list!

What do you need:

An USB Sound Card (10-15$ on Ebay/Amazone) Important LineIn / Stereo Microphone!!!
A Case 70x70x55mm
4 banana jacks
2 BNC sockets
luster terminals
2 Jack
cable Ties
2x 18KOhm Resistor
2x 180KOhm Resistor
and some solder


soldering iron
cutter knife


I am using Soundcard Oscilloscope by Christian Zeitnitz:


<p>Hey hey hey I promised some pictures but I am at finals at the moment, i just did the 2 chanels ocsi and I am missing the generator, I am just watching the signal of the led, it blinks really fast becouse i am trying to make PWM with interrupcions in the microcontroller i am using Pic 16 F886</p><p> I only have one scope but it worck kind of good, for the future i will try to make a circuit board just for it ( to avoid noises) <br><br><br>I made it in Colombia so its kind of easy to get the things, so dont get this to trash<br><br>I really apreciati this and i hope you keep the good work. :)<br> PD: srry bad english, sometimes i write when i am really ecited, and its not my foreing language<br><br>Muchas Gracias<br></p>
<p>Very cool, Thank you for rebuilding it! :)</p>
<p>Awesome Instructable!Easy to follow and build a working model in one afternoon. </p>
<p>Thank you, looks nice your oscilloscope!! :)</p>
<p>Excuse me, I have a question: I dont understand if the four banana jacks (the 2 black and 2 red) are only used for simplify the connections, or I have to use them for what? Sorry but I'am a newbie!!! Thank you in advance.</p><p>Lino</p>
They are used as the function generator. They are connected to the speaker output of the usb sound card. The two banana plugs are for the scope inputs.
<p>Yes, thank you :)</p>
<p>Hey, thanks for your toutorial. But I have one question. I bought the same adapter you used but on the Oscilloscope I get the same reading on both channels.</p>
<p>I am looking at getting back into radio and want to tune / align my old radios. Test equipment is expensive and want to try and use my PC as much as possible for things like an Oscilloscope and Signal Generator etc. Would I be able to utilize yours and how to connect to PC. http://www.cbtricks.com/radios/uniden/ax_144/graphics/uniden_ax_144_sm.pdf</p>
<p>There are many softwares to do so </p>
<p>that's a very interesting project..very nice work :) ..i just have a question on the voltage range : it says from 7 to 70 V!!! wouldn't that damage the electronics of the laptop ? </p>
<p>Hi hi. Would this adapter work?</p><p>http://www.amazon.co.uk/Dynamode-USB-Sound-Card-7/dp/B003QADH9C/ref=sr_1_fkmr1_3?ie=UTF8&amp;qid=1417812809&amp;sr=8-3-fkmr1&amp;keywords=USB+Sound+Adapter+7.1+-+DeLock+-Virtual+7.1+Sound+-+Xear+3D+Sound</p>
what is the maximum frequency it can handle/detect?
<p>The most sound carts can handle 20Hz to 22kHz, but also some start at 2-4Hz and end at 198kHz, what would then be the maximum frequency. :)</p>
<p>plz is that the same one you used <br><a href="http://egypt.souq.com/eg-en/usb-sound-card-adapter-40700440/u/" rel="nofollow">http://egypt.souq.com/eg-en/usb-sound-card-adapter...</a><br>as it the same every thing but with mono microphone i dont know if it would work good ??</p>
<p>It will work, but you will only have a 1 channel oscilloscope :)</p>
<p>I did a test and i am having issues with the earth i see a really bad signal, but thanks gotta post images at night do you have any idea ?</p>
<p>By now not, maybe bad connections or a bad probe, I will wiat for the photos :)</p>
<p>i was wondering i have a logitec usb microphone like the one for the wii its hand held. can i us that as the input for the osilloscope?</p>
<p>sure, but after that it may dont work as microphone anymore ;)</p>
I don&acute;t understand the connections betwen the resistor the bananas and the jacks coming from the USB Sound card. Please, could you explain it?
Its a Voltage divider, it divide the incoming voltage by ten, so you can work save with a Voltage up to 7V :)
Can You Show A Video How It Works? <br>
Sure, i will make one in a few days. :)
Hello <br>What type of probs do you sugest for this project ? <br>Great instructable by the way.
Just a normal one with 1:1 and 10:1 <br>Like this: http://www.conrad.de/ce/de/product/128654/pico-250-MHz-Tastkopf-vollisoliert-Teilerverhaeltnis-10111-umschaltbar-MI145?ref=searchDetail
What is your opinion on these ones ? <br>Are they any good ? <br> <br>http://www.ebay.com/itm/2-X-Oscilloscope-Scope-Clip-Probe-100MHz-Tektronix-HP-/370412413405?pt=LH_DefaultDomain_0&amp;hash=item563e4ce1dd
They look good, the probe should work :) <br>did you build my Oscilloscope? :0 <br>
Yes, but I am still new to the oscilloscope sciense. I already have some signal but I believe its just noise. <br>
Cool, can you post a picture of your oscilloscope? :) <br>get your mp3 player search and download a Sin mp3 file, play it to test the oscilloscope :)

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