Quote Originally Posted by skimask
If you really wanted to get crazy, you could easily drive an R/C aircraft servo to turn a rotary switch connected to a bank of capacitors (ya know, ka-chunk, ka-chunk, ka-chunk) and another servo to drive a linear pot. Drive servo's is easy with a PIC also. At least you'd have something mechanically silly to watch, something a tad bit over engineered.
JDG
Hi Skimask

before ... just learn how to fly models with old non proportionnal radios ...

THEN you can talk about all that ...

Ah ... look at the little ( humour ) difference between AD7376 and the XICOR X9xxx ...
One can be used ... and the other NOT here.

Alain

Hi, KB3

As the capacitor have one terminal to be grounded, you can use Mosfets like 2N7000 or BS 170 instead of the relays.
But it will introduce a small parasitic capacitor ... if it doesn't matter, that would be simpler to build.

Alain