This compact relay module turns a low-power control signal from your microcontroller into real-world switching of lights, fans, pumps, valves and motors. Opto-isolation separates the low-voltage control side from the load side for safer operation, and the module supports both low-level and high-level triggering.
An onboard LED shows the relay status, and screw terminals make load connections quick and secure. Always follow electrical safety practices and stay within the relay's rated current (up to 10 A) when switching mains-powered devices.
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