This General Electric circuit was found in a 1964 documentation. The circuit triggers a relay when the sensor is activated. Trigger adjustment is done in a trimpot.
Usiing that common diodes can oscillate, this circuit was given. The magazine that published it is...
After starting, this circuit turns off the relay in a time that depends on the 4020 pulse-count. This...
This circuit was taken from a Popular Electronics from January 1967. Transistors are from the...