Hoping to get some help here. So I am trying to control these drivers from an arduino. On top of the casing they say 0-10v pwm.
I opened them up to take some measurements. Starting from the top left. The first connector is the power to the LEDs. This reads ~86v at full power
The next connector which is the 4 pin connector. With leads places red on red and black on black. I get 0v when channel is off and (negative)3v when channel is at max. The green and yellow wires I get 8.5v when channel is off and 11v when channel is at max.but it’s 8.5v from 0%-99% and then 11v when at 100%.
The next connector is for the cooling fan.
So the red and black of the four pin connector obviously carry the control signal for dimming the lights correct? Which the 4 pin connector connects to a small control board at the front of the until that contains a LCD and a rotary encoder and an IR receiver.
I’m confused because I was expecting either to find a control signal that went from 0-10v or a pwm signal. Which if it was controlled with pwm wouldn’t I see it stay at 5v or would my multimeter interpret it similar to AC due to the duty cycle and the amount of time being off?
My first thought was well it’s a 5v pwm signal. And maybe my meter is seeing 3v due to duty cycle and the amount of time off, but then I thought shouldn’t it show 5v at max if it was pwm.
On the arduino if I change pwm value to 255 on a corresponding pin I see 5v.
What am I missing here?
Also there are two pots on the driver on is labeled min set. It’s function is really neat and only affects the leds if brightness is set between 1% and 5%. But it allows me to lower the brightness even further. Normal minimum voltage for the blue channel is 73.1 but with that pot I can lower that minimum low enough where the leds barely glow something like 60v. I have not been able to discover what the function of the other pot labeled MP-W-SET yet.
