This circuit was found in the September 1984 issue of Radio Electronics magazine. The circuit is based on a 555 and a MOSFET consisting of a flasher that controls a buzzer.
Found in September 1984 Radio Electronics issue this circuit has adjustable pulse width and...
This experimental AM microphone was found in an Argentine publication from 1973. The recommended...
This amplifier circuit was found in a Radio Electronics from April 1959. The circuit needs only 20 mV...