Found in a 90’s Electronic Engineering, this circuit detects the lack of phase in the supply of a three-phase load, powering a cut-off system.
The ZN414 is an uncommon integrated circuit currently used in the elaboration of very simple MW...
This latched alarm uses a double relay for this purpose and can control higher power external...
Found in a Popular Electronics from the 90's, this circuit uses integrated from that time, today...