Equivalent optocouplers can be used in this relay or solid-state shield. The power of the load depends on the triac used.
June 2017 - New Honeywell MT MICROSWITCH Series can be ordered from Mouser Electronics for...
This two-transistor circuit was found in the January 1994 issue of Electronics Now. The circuit can...
This circuit is from American documentation from the 70s. Transistors are not common today, but...