This circuit was found in the Electronics Experimenter Handbook from 1991. The sensor is a diode and the circuit has a relay according to the voltage used in the supply.
We found this conventional flasher by activating a relay in a 1987 documentation. The circuit...
The circuit was suggested by Analog Devices (www.analog.com) in its Application Note AN-411 and...
This circuit works in the opposite form to the previous one and drives a relay as a load. The...