Suffering with low signal to noise ratio on gargoyle and the innertubes..

I am looking for a couple of key components, they don't have to be
"shields", but they do have to play well with others.

1: Instrumentation amp suitable for EMG sorts of signals.

2: Power supply, variable output controlled by the processor, 0-50VDC.

I don't have an issue with designing these, but if they already exist
and aren't big $, I'd rather buy them.
--=20
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