Triac control circuit without galvanic isolation

摘要

The circuit has a coupling circuit with a node attached to a collector of a NPN transistor whose emitter is connected to a voltage (G1), and base receives an output of a microprocessor. Each of the node and voltage (G2) is attached to respective capacitor terminals. The node is attached to an emitter of a PNP transistor whose base is connected to the former transistor and collector is connected to the terminal of the triac. A diode connects the voltage that feeds the microprocessor to the coupling circuit. An Independent claim is also included for an operating circuit of an electromagnetic relay.