Found in a 1964 Electronic Design, this circuit suppresses arcs that occur in contacts when a relay switches inductive loads.
Frequency in this oscillator is controlled by a crystal. Any 1 MHz to 15 MHz can be used. The JFET can...
This control is intended for 110 VAC or 220 VAC Motors. Any TIC series triac can be used according the power...
A Popular Electronics from the 90's suggests this circuit that is based on a low voltage...