We found this circuit in a Popular Electronics of the 90s. The circuit can be easily mounted today, as the components are common. The SCR can be the TIC106.
This protector was found in an Electronics Now from the 90s. The 250 V transient suppressors are common...
Based on an LM36000 OTA this circuit was found in the July 1988 issue of Radio Electronics...
This circuit only works with incandescent lamps and the frequency is adjusted in the pot,...