It looks like the 5 volt that comes via USB is not enough for switching the relay’s
The leds react
This is normal, the relays are 12V types.
Thx
Guido
So to get the relays working, what do we do, put 12VDC on Vin. Is it possible that the LED’s are not going on, because of that 12VDC? I use a Arduino YUN.
The board is not compatible with the Yun, as the Yun does not supply 12V to the shield.