Parts placement

Some nice values for R, C1 and C2:

R	C1	C2
100	1u	100n
15k	22u	1u
10k	220u	10u

This is just a simple control module with 6 buffered potentiometers, switchable from -1V to 1V or from 0 to 1V.

sk506-cv-looper schematic

firmware

Parts plavcement

Setup procedure

1. set video input to black -> tie to 0V
2. adjust TRIM1 until there is 0 volts between the two testpoints (T1,T2)
3. adjust TRIM2 until siff-out is 0V