Found in a 1960s RCA documentation, this circuit applies to most common triacs. The trigger device is a neon lamp and the sensor is an LDR. R is typically 100k and C is 220 nF.
This control for motors with current up to 1.5 A was obtained in a 1989 publication, but it can...
This circuit preheats incandescent lamps, thus avoiding the impact of the current when switching on,...
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...