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1 Channel 5V Relay Module SPDT

49.00

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The Relay Module SPDT (Single Pole Double Throw) featured here is a single-channel device designed to control or switch high-power devices, surpassing the handling capacity of most microcontrollers like Arduino or Raspberry Pi. Specifically, this relay module can effectively manage typical household appliances with a power rating of up to 10A.

Note: The PCB color or layout might exhibit slight variations.

Understanding Relays: A relay serves as an electrically operated switch. While many relays utilize an electromagnet to mechanically actuate a switch, other operating principles, such as solid-state relays, are also employed. Relays prove valuable in situations where it’s necessary to control a circuit using a separate low-power signal or when one signal must control multiple circuits.

Relays operate based on electromagnetism. When the relay coil is energized, it functions like a magnet and alters the position of a switch. Notably, the circuit powering the coil is entirely isolated from the section responsible for switching ON/OFF. This isolation provides electrical separation. Consequently, it becomes possible to control a relay using a 5V signal from an Arduino while having the other end manage a 220 to 240V appliance. The higher voltage end is entirely isolated from the 5V Arduino circuitry.

Above: Example of connecting power and lights to a relays COM and NO connectors.

Specifications

  • 250VAC 10A, 28VDC 10A
  • Indicator LEDs
  • 5V control voltage
  • Module size: 55mm x 16mm

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