ground plane

this was what I was looking at as the input to the gain stage.

at 1v per division we’re looking at more than 0.5v of ‘noise’. that’s bad!!! the mic2506 is basically a switch with the 6v rail as input. I last checked the 6v rail when I soldered it so it was possible I screwed up something along the way.

then I looked down and saw the ground end of the probe was on the 4v rail.

a little futzing, and ahhh….

GIGO!

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