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On 18/02/11 16:54, V G wrote:
> Hey all,
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> I'm in desperate need of some sort of "oscilloscope" but don't really hav=
e
> the money to buy one at the moment. So I decided to make one.
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> It's going to be a very simple, low speed oscilloscope.
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> * For the ADC, I'm planning to use the LTC1418:
> http://www.linear.com/product/ltc1418 (5V, 14 bit, 200ksps, SPI, high
> impedance analog input, 0-4.096V input), which means around 100KHz bandwi=
dth
> tops, which is more than I need for now.
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> * The input to the ADC will come from a high precision opamp, probably an
> LTC1050: http://www.linear.com/product/LTC1050
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> Here's a basic overview of what I'm thinking (attached as well):
> http://img340.imageshack.us/img340/5610/oscilloscope.png
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> What do you guys think?
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Have a look at the DSO Nano oscilliscopes if you're on a budget:
http://www.seeedstudio.com/depot/dso-nano-v2-p-681.html?cPath=3D174

They are spec'ed up to 1MHz analog bandwidth (which is a lie--they
/sample/ at 1Msps so max 500KHz signal frequency at best).

At $90 you would be hard presed to completely develop from scratch
without spending more.

Brendan
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