Which Dimmers Mean Well Driver

linky

Well-Known Member

• Mar 3, 2017

• #1

I just ordered a couple mean well hlg 320 2100B drivers and need to order some dimmers for them, which dimmers should I be ordering? There a link on how to wire them properly somewhere?

thanks all

 

K

key4

Well-Known Member

• Mar 3, 2017

• #2

http://rollitup.org/t/dimmer-switch-for-meanwell-hlg.935114/#post-13376921

I followed this.

 

linky

Well-Known Member

• Mar 3, 2017

• #3

Okay, ordered some potentiometer's and 10k resisters.

thanks

 

M

morvis

Well-Known Member

• Mar 3, 2017

• #4

I got a 1000k ohm pot from radio shack. Works ok, but it doesn't start dimming until the knob gets past about the half way mark down and only dims to about 50%.

 

Organic Miner

Well-Known Member

• Mar 3, 2017

• #5

morvis said:

I got a 1000k ohm pot from radio shack. Works ok, but it doesn't start dimming until the knob gets past about the half way mark down and only dims to about 50%.

Click to expand...

You probably purchased an "audio taper" pot and not a "linear taper" one. That's why you don't see the nice gradual dimming.

 

M

morvis

Well-Known Member

• Mar 3, 2017

• #6

Organic Miner said:

You probably purchased an "audio taper" pot and not a "linear taper" one. That's why you don't see the nice gradual dimming.

Click to expand...

It's this one here
https://www.radioshack.com/products/radioshack-1m-ohm-linear-taper-potentiometer

I'm about to put together another cob fixture got sit next to the one I have going now. I'm going to use the info on the thread linked above and put them both through a common 50k and a resistor and see if it works better for me.

 

1

1212ham

Well-Known Member

• Mar 3, 2017

• #7

That's 1 mega ohm, should be 100k.

 

M

morvis

Well-Known Member

• Mar 9, 2017

• #8

I understand its a mega ohm. I guess I just don't quite understand how they work. I figured a 1 mega would be able to make it more dim =).

 

xX_BHMC_Xx

Well-Known Member

• Mar 9, 2017

• #9

AFAIK the DIM +/- leads are just a .0001A constant current source. As you increase resistance, voltage increases due to ohms law. You need a 100k ohm potentiometer to get 10V, and thus full power from the driver. The reason for the 10k resistor is to keep minimum power at 10% as the HLG does not have a dim-to-off function. You could also wire up a couple of switches with different value resistors if you only want to switch between a couple levels of brightness.