Meanwell LPF Series Dimming Solved

[Vancouver Reefer]

oops i forgot to add on a 1K pulldown resistor between the Meanwell + and 0V. This will prevent the driver from going to 100% brightness in the event the driver circuit stops working or has a power failure.

Steve,

I tried using a NPN before and it would not drive the LPF series driver. Here is what i had tried before but with no luck:

Controlling + lead:




So next i tried this circuit using the 10v supply to control the - lead:




I then tried the following circuit as the 2 previous would not work. This i could get the drivers to dim but with the Arduino fading from 0-5v i could only get the circuit to output 3.5v-6.5v.



I hope the background helps.