Found in 90s Radio Electronics, this shield can control high voltage loads in the power grid. Isolation is guaranteed by the use of an optical coupler.
The configuration of this circuit was suggested by an old English publication that comes to...
This circuit triggers on a relay after a time delay adjusted by P1. The range of times achieved by...
With this simple tester you can measure the gain of an NPN or PNP transistor. The instrument can...