[[Image(verarelay.png, align=right, width=600px)]] = Relay Actuator = == Software == You can download the Arduino sketch [[http://code.mios.com/git_public/mios/arduino-sensor.git/tree/HEAD:/VeraArduino/Arduino/libraries/Vera/examples/RelayActuator?js=1|here]]\\ == Wire things up == Follow the instructions in ConnectingRadioModule to connect radio module. Connect the IN1 and IN2 of relay to digital pin 3,4 of Arduino board.\\ Connect VCC to +5V of the Arduino board. GND to GND.\\ I used a dual relay module. But the code can easily be adapted to handle more or less relays by modifying RELAY_1 (which digital input first relay is connected to) and NUMBER_OF_RELAYS defines at the top of the sketch code. == Hardware - Purchase guide == To build this sensor you'll need one arduino + radio specified in the base kit found here:\\ http://code.mios.com/trac/mios_arduino-sensor/wiki/WikiStart#Buyingguide\\ With the following additional parts:\\ 1x [[http://www.anrdoezrs.net/click-7319170-10881559?url=http%3A%2F%2Fwww.aliexpress.com%2Fitem%2F5V2-CHANNEL-RELAY-MODULE-FOR-ARDUINO-PIC-ARM-DSP-AVR-ELECTRONIC-SCA-1720%2F933830812.html|Relay module]]\\ TOTAL SENSOR PRICE: $7.6 (arduino + radio) + $3.3 (relay module) = '''$10.9''' [[Image(relay.jpg, width=500px)]]