This circuit was found in the April 1998 issue of Electronics Now magazine. The circuit uses common operational amplifiers and uses a dual power supply.
Available at Mouser Electronics this component of Diodes Incorporated consists of a voltage...
Found in Radio Electronics this circuit uses a fotodiac to drive a triac. The circuit can use...
The first circuit was suggested by Analog Devices (www.analog.com) in its Application Note AN-411...