Charger protection relay (CB26312E)

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

Insulated Shield for Inductive Loads (CB17563E)
This triac control shield uses an opto-diac to control a triac. The circuit is optimized for the...
TRC Adjustment Potentiometers (CB19854E)
This circuit is from old documentation. It shows how to implement the voltage adjustments of an...
Collector Variable Current Transistor Tester (CB19465E)
We found this dynamic tester for transistors with variable collector current in a publication in...