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Originally Posted by Butcher
If the psu and the miniNG have a common ground (likely) you may well be able to just hook the one directly to the other. You may need a pull down resistor or current limiting resistor depending on the configuration of the PSU. Can you post a circuit diagram or pics of the circuit board?
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How can I find out if they have a common ground?
I don't have any circuit diagram but here's a couple of pictures on the potentiometer area. The switch on the back overrides the pot and locks the output voltage to 13.8V.
The last time I tried to figure out how to do this I did some measuring but I didn't really know what to measure.
But non of the three wires seemd to be connected to ground?
Should I take a photo of something else or maybe measure something?