This simple SCR control was found in the December 1987 issue of Radio Electronics magazine. The circuit uses a well-known C106 but can be used in equivalents of the same series.
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...