This circuit was obtained in a documentation about old neon lamps. The circuit indicates when a home appliance with thermostat and heating element is on.
In the figure we have the way to control a triac with a low current and low voltage switch,...
This trigger circuit was found in old European documentation, but it can be implemented with...
May 2017 - The new ROHM SFR series anti-sulfur resistors can now be obtained from Mouser...