It serves as a reference, since today we can have simpler and more compact solutions. This circuit is from an Electronics Experimenter Handbook from 1992. The integrated circuits are from that time.
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...