Charger protection relay (CB26312E)

This circuit was obtained from an Elektor magazine from the 90s. The circuit is to protect batteries while charging.

Bike Flasher (CB16428E)
We found this conventional flasher by activating a relay in a 1987 documentation. The circuit...
Acceleration to Frequency Converter (CB23587E)
The circuit was suggested by Analog Devices (www.analog.com) in its Application Note AN-411 and...
Light Sensor 2 (CB5974E)
This circuit works in the opposite form to the previous one and drives a relay as a load. The...