YOUTUBE VIDEO OF THE PROBLEM
Hi, so I am building a camera slider using an Arduino Mega with RAMPS 1.4. 99% of the circuit works. The only trouble I have left is that my camera shutter Relay does not click. It only lights up the LED.
The relay has + - and Signal.- Signal is connected to the Arduino and the + and - go to a 5V power supply. That power supply is then connected in paralel to a 12V car batttery alongside the Arduino itself. I also have two stepper motors and a huge display connected. That stuff all works fine.
When the Arduino is runnig it only lights up the LED when it is time to take a picture, but the Relay does not click. I checked the pins on the relay and there is 5.6V across it from the power supply. So it does get a signal and it has power, but still no click.
If I short Signal to +, it does click, but it doesn´t click when the Arduino activates it.
What am I doing wrong here?