This zero-crossing circuit was found in the 1989 Radio Electronics Experimenter. The Triac must be controlled according to the load.
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 or...
This circuit with the HA2400 was found in the March 1980 Radio Electronics magazine. The circuit has...
This circuit has two high-impedance inputs. The gain is high and more inputs can be added. Use a...