OpenSprinkler Forums Hardware Questions OpenSprinkler Design of the 24VAC version Reply To: Design of the 24VAC version



The traic is not that much different from a transistor or MOSFET for switching DC devices. A logical level control signal applied between its gate and MT1 (equivalent to base-emitter in NPN transistor, or gate-source in MOSFET) allows current to flow through MT2 and MT1. Why would you think this will destroy the MCU? This is the basic mechanism of how transistors work.