I think there ought to be a functional test... so how about a simple surface mount amplifier and input/output jacks.
Again, if you can come up with a working circuit that (1) uses all the different footprints, (2) costs less than $2, and (3) fits in about half a square inch, I'm all for it.
Mostly it's 1 and 2 I'm concerned about, 3 really just affects 2. Otherwise, you could buy any electronic kit.
Now, a 555 and an amp, some caps and resistors, maybe we have something.
-Dave
-- Dave McGuire Cape Coral, FL
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