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Old 29th March 2003, 01:02 PM   #1
Bricolo is offline Bricolo  France
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Default DIY oscilloscope

Does anyone have shematics for this?

I'm using a friend's scope right now to test my gainclone, and it (the scope ) works quite good
My friend told me his father built it many years ago


I think I'm not the only one interessted in building a scope, since the commercial products are so expensive
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Old 29th March 2003, 01:59 PM   #2
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Default I've built two scopes from scratch

the first was just a waveform monitor -- used it to look at the transmitter output from ham radio gear -- the second was from an article in Electronics World or Popular Electronics, but I built the unit on a military surplus 3" scope chasis. It was a lot of work and I wouldn't do it again.

Because of the telecom bubble in the US and elsewhere good TEK and HP scopes can be had for a small fraction of their original price. If you don't want to go this far upscale, many of the Heathkit scopes are very dependable and dirt cheap, I mean like $20. Most EBay sellers with good feedback ratings will ship outside the US. Often to adapt to the higher European voltage it's just a matter of changing a jumper in the back.
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Old 29th March 2003, 02:00 PM   #3
Fuling is offline Fuling  Sweden
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The Swedish edition of Elektor had an article about a DIY oscilloscope some years ago, using a matrix of several small LED:s instead of a CRT. Didn“t look very useful though.
Besides the parts would cost more than a used “scope.

If you are more interested in getting a useful scope rather than the challenge of building one I would suggest that you look for a second hand. I bought one some weeks ago for 300SEK (about 30 USD)
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Old 29th March 2003, 02:16 PM   #4
banana is offline banana  Hong Kong
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Default How about using your PC as a scope?

http://www.picotech.com/
http://www.tiepie.nl/
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Old 30th March 2003, 09:56 AM   #5
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Default Re: I've built two scopes from scratch

Quote:
Originally posted by jackinnj
It was a lot of work and I wouldn't do it again.
I'll second that. This was my effort a long time ago -> http://www.diyaudio.com/forums/showt...848#post137848
Way better idea to buy some old second hand thing. Stick to a solid state scope though because a vacuum tube one may cost just too much to bring up to spec if it has seen a lot of running hours. Also, don't *repeat* don't buy anthing cheap just because it needs a new crt. Some of these are ridiculously priced. I had a $50 scope that was lacking in brightness and the price of a new crt was AUD$900. No thanks.
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Old 30th March 2003, 10:35 AM   #6
cyr is offline cyr  Sweden
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I'm currently designing a PC-based oscilloscope myself, not exactly an easy project but certainly very interesting.

If you want a scope to measure your main projects rather than the scope being your main project I would not recommend trying to build one.

If you are still interested there is some stuff on the web:

http://www.alternatezone.com/electronics/dsoamk3.htm
http://www.bitscope.com
http://www.johann-glaser.at/projects/DSO/

And my own design so far (some of it at least)
http://area26.no-ip.org/?section=hard&project=scope
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Old 4th April 2003, 12:51 PM   #7
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a link to this site was on rec.radio.amateur.homebrew last night:

http://www.users.bigpond.com/zim123/...c/default.html
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Old 5th April 2003, 07:34 AM   #8
Bricolo is offline Bricolo  France
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very interesting!

I also found this one: http://www.nbb.cornell.edu/neurobio/...rnee/index.htm



has someone already experienced a digital oscilloscope with a graphic lcd and a microcontroller?


This would be an interesting project!

The only thing it I don't know if a lcd would have a high enough refresh rate
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Old 5th April 2003, 04:23 PM   #9
dhaen is offline dhaen  Europe
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Quote:
has someone already experienced a digital oscilloscope with a graphic lcd and a microcontroller?
I've not built a digital scope, but I own one.
Although it is only 60 MHz bandwidth, the sampling frequency is 1GHz (to get enough resolution). This would not be a trivial project!

Cheers,
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Old 5th April 2003, 04:51 PM   #10
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FREE OSCILLOSCOPE

Go to this link:

http://polly.phys.msu.su/~zeld/oscill.html

Dowload the software and you turn your PC soundcard into a dual trace oscilloscope. I have seen it work.

Best deal this side of Santa Claus.

Aud_Mot
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