This 3-transistor buzzer or buzzer is a classic type found in the July 1998 issue of Electronics Now magazine. The power rating depends on the output transistor.
The purpose of this circuit is to allow common analog multimeters to measure low resistances, on...
This is the circuit of the N-201 commercial multimeter of the analog type. The circuit is from...
This receiver was found in the Radio Electronics magazine of March 1953. It tunes to the medium wave...