On Sat, Feb 19, 2011 at 3:29 PM, Nathan House <nathanpiclist@gmail.com>wrot=
e:

> Wouldn't a DIY oscilloscope with a microcontroller be limited to 0-5V?


Yeah, but if you look at the diagram, there are several modules in there to
take care of that.

* Input scaling resistors to downscale the voltage into range.

* Opamp gain setting resistors to scale up tiny voltages.

* Shunt to prevent over voltage into the ADC
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