Found in a 90’s Electronic Engineering, this circuit detects the lack of phase in the supply of a three-phase load, powering a cut-off system.
This circuit for signals around 4.5 MHz for old analog TV was found in the September 1992 Radio...
The circuit shown is a commercial electronic voltmeter sold in Japan in the 1960s. The circuit is fully...
This 80's circuit can be implemented with modern equivalent FETs with lower on resistance. The...