Hello- I am making an LED dimmer for a Meanwell HLG-240H-42B led power supply, using the 3-in-1 dimming capability of this driver. It is basically a 1-10V / 0.1mA connection on the driver, which seems to be a standard dimming approach. The dimming part is easy using a B100K potentiometer. HOWEVER: I want to display this dimming amount on an LCD screen as 0-100%. I was able to do a test using a breadboard and the potentiometer connected to my Arduino’s 5V output. Reading/writing the pot values was fine. But as soon as I connected the potentiometer to the Meanwell’s 1-10V dimming wires, I could no longer read or write the correct values. The potentiometer values I was reading were erratic and all over the place, and writing the value to the lcd screen just produced an illegible scramble of characters on the screen.
Does anyone know what the problem is, and how to fix it? I was assuming that since the potentiometer was connected to more than 5V, this was out of range for the Arduino to read (?). Is there a solution out there for me?