This circuit was found in a 90s Popular Electronics. The circuit operates in the range determined by L1. The integrated circuit used is uncommon today.
The high sensitivity of this type of SCR recommended in our assemblies allows it to be triggered by low...
Found in a 90s documentation, this circuit triggers the SCR when there is an overvoltage in order...
This circuit was found in a 1989 documentation and was intended to be part of a presence...