Step 20Wire the reciever
Affix the relay to a small piece of perfboard.
Connect one of the relay's coils to ground on the Arduino board and the other to pin 3.
Attach 9V to one of the relay's load pins and a long red wire to the other. To get easy access to the 9V power source, I broke off the top of the 9V battery snap and soldered a wire directly to the +9V battery connector tab (notice the extra red wire coming from the 9V battery snap).
Attach an extra long black wire to ground.
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