This circuit was found in a 303 Circuits issue of Elektor magazine from the 1990s. The circuit uses an equivalent operating system. The source is not symmetrical.
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...