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Author Topic: convert your PC to an oscope for $1  (Read 2566 times)

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Offline AdminTopic starter

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convert your PC to an oscope for $1
« on: July 24, 2008, 08:00:56 PM »
The full article:
http://www.roboticsindia.com/modules.php?name=News&file=article&sid=112

basically, use a sound jack and hook it up to your circuit:


then run this program:
http://poly.phys.msu.su/%7Ezeld/oscill.html


or create your your own signals (function generator)
http://www.virtins.com/



(note: I haven't actually tried it myself)

Offline rgcustodio

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Re: convert your PC to an oscope for $1
« Reply #1 on: July 25, 2008, 04:31:24 PM »
good for low speed devices. if you go up to 10MHz++ it might be overwhelmed.
The best thing one can do when it's raining is to let it rain. - H. W. Longfellow

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Offline krich

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Re: convert your PC to an oscope for $1
« Reply #2 on: July 26, 2008, 12:02:34 AM »
I seem to remember reading that this won't work with DC voltages due to some filtering going on in the typical sound card.  I may be wrong...actually, I hope I am.

Offline BANE

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Re: convert your PC to an oscope for $1
« Reply #3 on: July 28, 2008, 07:16:06 PM »
what about just for standard servos and stuff?  For only a $1 it might be worth a shot.

BTW, the first link Admin posted says "forbidon"  does it say that when anyone else tries?

Bane

Offline JonHylands

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Re: convert your PC to an oscope for $1
« Reply #4 on: July 29, 2008, 06:24:33 AM »
Thing you have to remember - it only costs $1 until you fry your PC, then suddenly it costs a lot more...

- Jon

Offline izua

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Re: convert your PC to an oscope for $1
« Reply #5 on: July 29, 2008, 10:52:38 AM »
You can't fry the pc thateasy. I fried a mike input, though, attempting someting similar. Line signal has a 1V swing, so that's +-0.5. keep that in mind when delivering signals to your audio card.
Check out my homepage for in depth tutorials on microcontrollers and electronics.

Offline krich

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Re: convert your PC to an oscope for $1
« Reply #6 on: July 29, 2008, 04:03:23 PM »
The software is here:

http://www.zelscope.com/

And look what I found in the FAQ.   :'(

Quote
Q: Can Zelscope display DC voltage?
A: No. All known sound cards contain a capacitor which provides AC coupling and prevents DC from reaching the card's analog to digital converter. Low-frequency oscillations (below 15-20Hz) usually get through, but may be distorted.
« Last Edit: July 29, 2008, 04:04:55 PM by krich »

 


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