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.
We found this circuit that makes use of CMOS technology in a 1988 publication. The circuit has...
This circuit was found in a 1967 EEE. The transistors are from the time and can be tested...
We found this circuit in a 1991 Hobbyst Electronics. The circuit makes use of an unusual...