This circuit is from an 80's documentation, firing when the input voltage exceeds 5 V. The SCR can be the TIC106 need not have a heatsink.
This circuit was suggested by Motorola in a 1980s publication. It is based on a PUT that is not a...
The purpose of this circuit is to control magnetic door locks activated by the power grid. The...
We found this circuit in an old English documentation from 1979. The circuit is very sensitive, because...