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Thanks, but I think this is a bit more easy to handle and similiar to what I'm using ;) https://www.arduino.cc/en/Reference/AnalogWrite

@stardustsailor I just read out a poti and divide the readings 0-1023 with 4 to get the proper output for PWM signal 0-255. As per arduino tutorial I just use the analogWrite(pwmPin, sensorValue) function at digital pin 10 for the PWM signal

Hey @guod , I built the circuit but at the DIM + and DIM- I just get +10.06V output, independently of what the PWM is outputting so i think there has to be an error. The PWM output works (Arduino and Poti, 0-5V), the Voltage Regulator works (12V --> 10V) so the error has to be at the transistor...

@littlejacob my driver doesnt support potentiometer dimming and for automation pwm is better... but your mileage may vary

Thanks @guod I'll have a go at it tomorrow. The 7810 did put out a bit over 10V, when I remember correctly the driver accepts everything under 11 or 10.5V.

I built the circuit based on this: https://www.rollitup.org/t/meanwell-led-drivers-3-in-1-dimming-function.838760/page-2#post-10727435 I use an Arduino Mega, with a 4K7 Resistor between Arduino and Transistor, using Pin 10 what should equal to ~490Hz PWM frequency.

Dear @stardustsailor , I put together your pwm dimming circuit and it tested perfectly putting out 1.5-10.5V at the DIM+/- exit, but as soon as I connect my MW LCM-40 (officially supports 10V PWM and 10V analog dimming), i only get about ~3-5 V and the driver only puts out about that much light...

does anyone know if i could fit a cxb3590 @600ma on a meanwell lcm-40 or how much volt the cxb needs at 600ma? meanwell states that it provides 67v, i dont know if thats enough....