Found in an 80's Elektor, this circuit can use any equivalent optical coupler. The buzzer is of the Sonalert type with included oscillator.
Found in a 1965 General Electric circuit manual, this circuit uses SCRs from that time. Modern...
November 2016 - Vishay's new proximity sensors VCNL4100 for display presence and activation,...
This circuit is used to test SCRs like the ones of TIC series. The simulation shows the power line...