Charger protection relay (CB26312E)

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

Serial IN parallel out (CB24931E)
This circuit shows how to use flip-flops in a SIPO circuit with serial input and parallel output....
Low Voltage Regulator (CB14163E)
This circuit was found in the National Semiconductor Linear Applications Handbook, published in...
Lie Detector (CB6363E)
This circuit is from an 80's technical newsletter. The circuit can use any general purpose...