#ARDUINO RELAY SHIELD PROJECTS SERIAL#

This is the method recommended for most applications. There are several options for supplying power to the relays connected to the shield, depending on the settings of the jumper labelled 'POWER INPUT CONNECT TO VIN' and where you connect your power supply. Relay 1 -: Connect to the - side of the coil of your first relay. Relay 1 +: Connect to the + side of the coil of your first relay. INPUT 5-24 Vdc -: Connect to the negative (-) lead of the power source for your relays.

INPUT 5-24 Vdc +: Connect to the positive (+) lead of the power source for your relays. You do not need to do that when using the 8-Channel Relay Driver Shield, because the protection diodes are built in to the shield itself. In many tutorials about relays you will see instructions that you must include a protection diode across the relay terminals. Connect from 1 to 8 channels to your relays as required. Relays are connected directly to each output channel. Mount the 8-Channel Relay Driver Shield on your Arduino-compatible board. No other pins on the Arduino are used by the shield other than power, so they are all available for connection to other devices in your projects.

#ARDUINO RELAY SHIELD PROJECTS SERIAL#

The shield uses Arduino analog pins A4 and A5 for 'I2C' serial communications with your sketch. You can use any of the output channels independently, so simply leave any unused channels disconnected. The 8-Channel Relay Driver Shield makes it simple and convenient to drive up to 8 loads such as 12V relays from just 2 pins of your Arduino compatible board or other microcontroller.

Arduino relay shield projects