Using a 106 series SCR, this circuit was found in the May 1971 Radio Electronics magazine. The quiescent current is very low and is given by the value of R1.
This circuit was found in an English magazine from 1978, but it is still current, just change the...
This circuit causes a buzzer to emit an intermittent tone when the temperature sensed by the...
This microcontrolled null adjustment for operational amplifiers was obtained in a Linear...