This 1967 Raytheon circuit uses a Raystor, an optical coupler with a lamp and an LDR. The circuit can be adapted to use another type of coupler.
The purpose of this circuit is to disconnect the battery in case of an excessive charge current,...
This stage for general purpose transistors was taken from an old technical manual. The circuit can...
This circuit can be used with previous transmitters to decode a signal transmitted via power grid....