The primary purpose of a relay is to control a larger circuit with a smaller, separate control signal. It essentially acts as a switch, allowing a low-power signal to switch on or off a higher-power circuit. This allows for remote control, automation, and protection of electrical systems.
The primary function of a relay module is to switch electrical devices or systems on and off. It also serves to isolate control circuits, ensuring that low-power devices, such as microcontrollers, can safely control higher voltages and currents.
Channel 5V Relay Module is an interface board and can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, and so on. With digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs.
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