A single channel relay module is a commonly used board in order to control high voltage, high current load. This module is a 12v single channel relay interface board with screw terminals that can be interfaced with any wide varieties of microcontrollers, Arduino, pic, etc. This is a prominent and high-quality relay board that can handle a maximum of 15A @ 125V and 10A @250V AC. The LED in the relay indicates the status of the relay. This consists of mainly three connections: common(c), normally open (NO), normally closed (NC), and connected to the screw terminals which makes the wiring much easier. This relay circuit safe drove by BC 547 transistor hence protects the microcontrollers from the relay circuit.
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