Found in a Hands On Electronics from the 80's this circuit allows the reading of low resistances in a common multimeter. The circuit consists of a constant current source.
This small amplifier uses a loudspeaker as a microphone and can be used in a simple intercom. The...
September 2016 - It can be obtained by Mouser Electronics the new dual analog switches TS5A22364 /...
This different power control circuit with SCR was obtained from a 1967 magazine. The SCR can be...