This shield with full-wave triggering was found in the Radio Electronics Experimenter magazine of 1989. The Triac must be according to the load that must be controlled.
This amplifier for automotive use is from the Philips Databook of 1990. The integrated circuit must...
This fast-acting circuit uses any phototransistor as a sensor. The circuit drives a 30 V relay, but...
With this 1-transistor circuit we have a high input impedance and good gain. The circuit is from a...