Found in an Electronic Engineering from the 80's, this circuit makes use of components of the time. The circuit can be implemented with modern equivalent components.
This circuit for the 1750 m band was published in the September 1989 Radio Electronics magazine. The...
The purpose of this circuit is to disconnect the battery in case of an excessive charge current,...
This circuit was originally designed to operate with the alarm CIR12065 which has a tone output. It...