We found this circuit in a Popular Electronics from the 90's. The circuit uses three SCRs to trigger the loads.
The components used in this 80's circuit are uncommon today. The circuit is intended for...
This source was found in a 1982 American publication, but can be easily assembled using 2N2995 (PNP...
This Maxim Voltage Supervisory integrated circuit can be obtained from Mouser Electronics. It has...