My original intention was to use my Thornwave LVD as this was a really nice controller that featured a bluetooth app I could access with my phone. Unfortunately I wired this off of my memory and well my memory was a little off and I fried it.
So I had to improvise and build a simple Arduino controller. This is very simple; it uses pins A0 as the input for the battery voltage fed through a voltage divider and then the LED (pin 13) as the output to trigger the timer boards. You will need a 12v to 5 volt buck convert to supply power to the Arduino. Wiring is self explanatory once you have all the components. If not simply ask here on the forum.