Found in a 1967 RCA documentation, this AC power grid contactor can be fitted with modern equivalent components. The SCR and the diodes must be according to the load current.
This turntable filter was found on an 80's Elektor. The circuit makes use of operational features...
Found in Popular Electronics this circuit uses common components to control an incandescent lamp with...
This circuit is from a 1973 documentation. In it we have the way of using a FET as an input of...