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5V 2-Channel Relay Module Shield for Arduino ARM PIC AVR DSP Electronic ( £1.50 on 8/4/2017)

https://www.amazon.co.uk/gp/product/B00CRVYIMG/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1


Diagram:

Vcc=JD-Vcc = + 5v

IN1= GND  ( LED= ON, and relay= switch over)




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