This shield was found on an old EDN. The MOSFET can be of any type according to the controlled load. The power can be between 5 and 15 V typically and can be different for the MOSFET.
Found in Popular Electronics this circuit will trigger a buzzer if the ignition key is removed...
Found in the July 1968 Supertena Bulletin of a Popular Electronics, this receiver makes use of the...
This common metronome configuration has already appeared in several of our articles and projects. This...