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.
For those who like experimental circuits, here is a sequential flasher system with LEDs, which can be...
This circuit can be used in broilers, greenhouses, drying chambers to regulate the temperature in a simple...
This circuit consists of an electrostatic sensor that can check if a cable is energized by simply...