We found this circuit in the May 1996 Electronics Now magazine. The relay must have a voltage according to the circuit power supply and a trigger current of no more than 50 mA.
This low distortion circuit was found in a 1964 Electronic Design. The transistor admits...
This PWM circuit was found in an American publication from 1978. It consists of a simple control that...
This tone-modulated transmitter was found in recent English documentation. The circuit operates in the 27...