This shield circuit for lamps and other charges was found in a Popular Electronics from the 90's. The MOSFET admits equivalent according to the charging current.
This sensitive circuit was found in the August 1971 issue of Radio Electronics magazine. The SCR...
Suggested by General Electric, this circuit with triac is able to reverse the rotation of a motor...
This circuit applies to an old dial phone by detecting light pulses in the dial. The circuit is...