Indicated by Popular Electronics to be used with a car headlight, this circuit can also have applications in fixed signaling. The power MOSFET must be in accordance with the lamp.
This circuit emits a sound when a magnetic field, of a magnet, for example, approaches the sensor....
Simple timers can be designed using inverters or any other gate that can be connected as inverter. Figure...
This circuit was obtained from an American documentation from 1976. The circuit can be adapted to...