I know the same company that makes these 8ch relay boards also makes 16 channel boards. This module has problem with voltage to relay. I would love to see a YouTube of it in action. // put your main code here, to run repeatedly: for more details please refer the the CSRBC417 Datasheet. I picked this one because it had and inline switch for safety. great suggestion! So Arduino is a microcontroller that you can program to do tons, […] MENU; Submit Video. You can use for control the Arduino’s Pin13, Pin12, Pin11, Pin10 and continue in these form. Now that we know everything about the relay module, it is time to put it to use! pinMode(relay4, OUTPUT); digitalWrite(x, HIGH); When connecting the arduino to the relay board sain smart uses optically isolated boards. Leave it on if your using the arduino to power the board, if you were to use an external power supply you would remove it. Install “ARDUINO – BLUETOOTH 8 CH.” Application from Google Play Store. 2 years ago any ideas on how to make it flash to music? This is a 5V 8-Channel Relay interface board, Be able to control various appliances and other equipment with large current. Connect the IN1 pin on the relay board with PIN 4 of Arduino. Add the following snippet to your HTML: