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This product is a 5V 8 Channel Relay Module Relay Board with LED indicators, It can be controlled by microcontrollers such as Arduino, AVR, PIC, ARM any other microcontroller operating at 5V.
This relay board provides 8 optically isolated inputs that accept a wide range of voltage, including the 3VDC and 5VDC signals available on the Arduino. This is a great way to switch on or off AC or DC loads using your Arduino!
The relay module are single-pole double-throw (SPDT) and are rated for 10A @ 250VAC. The ground for the relay coils is separate from the ground for the input signals.
This Arduino Relay Module Shield provides a solution for controlling high current devices that cannot control by the Arduino digital I/O pins because of their current and voltage limits.
The Relay Shield features four high quality relays and provides NO/NC interfaces, four dynamic LED indicators to show the on/off state of each relay. And the standardize shield from factor to provide a smooth connection to the Arduino board or other Arduino compatible boards.
1x 5V 8 Channel Relay Module Relay Board
How it works with Arduino board: