Using 5 V relays, this circuit can be used as a control shield for microcontrollers. The circuit uses relays, and the motor voltage is independent of the control voltage.
This crystal radio or galena was found in an English documentation from the 70's. The diode must...
This circuit that uses only discrete components (transistors) mimics the sound of an American...
For bench use, this circuit functions as a bistable safety switch. The circuit is from a Radio...