Charger protection relay (CB26312E)

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

Logic Trigger (CB6602E)
The purpose of this 1967 Philips circuit is to produce a rectangular signal from a sharp pulse....
Adapted from capacitance (CB25301E)
This circuit allows you to read capacitances on a common analog instrument. It is part of an...
AM transmitter for TV (CB23887E)
The idea of this circuit is to use an AM radio with headphones to receive sound signals...