This static switch circuit or solid-state contactor was found in a Motorola documentation from 1968. The circuit can control a 5 A load with the indicated transistor.
The UAA180 integrated circuit is no longer manufactured, but if the reader finds one in a scrap...
This circuit is from an old National Semiconductor component manual. The circuit can be...
This circuit makes use of a diac to stop the activation of a sensitive reed relay 1 mA. The trip...