The component used in this circuit is uncommon today, as the circuit was obtained from Motorola's Linear Databook of 1990. The circuit consists of a 5 V x 500 mA switched regulator.
The circuit shown in the figure below is suggested by ON Semiconductor (www.onsemi.com), based on...
This control is intended for 110 VAC or 220 VAC Motors. Any TIC series triac can be used according the power...
This circuit was found in a 1999 English magazine, but can be easily assembled with BC548...