I have the new BrewPi Spark v2 Controller
https://store.brewpi.com/featured/brewpi-spark-v2 and I am trying to get it to control the Sainsmart 2 channel relay. I notice that the digital output is only @4.8v not 5v ... could this cause the relay to not "click"?
On the 4 PIN [GND, IN1, IN2, VCC] I connected:
BrewPi Digital Out (set 0) + <----------> IN1
External Power 5V + <------------------> VCC
External Power - <------------------> GND
On the 3 PIN side of the realy [JD-VCC, VCC, GND]:
The jumper was on the JD-VCC & VCC
The GND was not connected to anything
I have verified that the relay does in fact work. I have verified the touch screen on the BrewPi does in fact turn on/off the digital outs (each one is pushing 4.8V).
I am a NOOB when it comes to the relays and the hardware portion of this project I must admit, the schematic found here:
http://www.sainsmart.com/arduino-pro-mini.html did not help me.