This circuit turns off a load after an interval of 8 to 80 seconds adjusted on the potentiometer. The circuit is from a Radio Electronics June 1970. The time depends on C1 and can be changed.
G This neon lamp indicator was suggested by General Electric in 1970 documentation. Virtually any neon...
We found this circuit in a 90s Electronic Design. The circuit is based on a quadruple operational...
This circuit for photography uses was found in the Electronics Experimenter Handbook Special...