When using Arduino to do interactive projects, a lot of high current or high voltage devices usually can not be directly used Arduino digital IOport control

(Such as solenoid valves, lamps, motors, etc.), then you can consider using the relay programs to address.

Arduino Relay Shield is the use of high-quality relay Songle provides fourinputs and outputs can be connected up to 250V/10A AC equipment

Or 24V/10A DC device, thus can be used to control the lamps, motors and other devices.

The modular design makes it easy with Arduino expansion boards are connected. Relay output state by a light-emitting diode that facilitate practical use.

 

Technical parameters:

Control signal: TTL level 
rated load:

10A 250VAC

10A 125VAC

10A 30DC

10A 28VDC

Rated through current: 10A (NO) 5A (NC)
Maximum switching voltage: 250VAC 30VDC

Contact action time: 10ms less

Module pin definitions:

1 1 feet -4 foot - control side,

2 power supply ( VCC )

3 ground ( GND )