The use of a diac improves the performance of the two dimmers in the previous circuits. The circuit is from the same Radio Electronics magazine in an article that teaches how to use triacs.
Other operational amplifiers of the same series can be used on this circuit found in Motorola's Linear...
This circuit uses a capacitor to store energy. The capacitor is charged by closing S1 by a moment. Them,...
Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found...