Charger protection relay (CB26312E)

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

Common Emitter PNP Relay (CB25611E)
This relay shield was found in the October 1993 Electronics Now magazine. The circuit is powered by...
Programmable zener (CB9159E)
The circuit shown was found in Intersil documentation from the 90s. The formula allows to...
High Sensitivity Comparator (CB12525E)
We present a comparator with signal resolution in the submicrovolt range. The matched pair of...