This circuit was obtained in old documentation, but it is valid for modern triacs that must be equipped with heat sink. The trigger element is an ordinary neon lamp.
This interesting sensor for RF signals was found in an article in the June 1989 Radio Electronics...
The frequency of this oscillator depends on the inductor and capacitors in parallel with it. In...
This circuit was found in RCA and General Electric documentation from the 1980s. The circuit has...