M\W xlg-240h-AB how to dim ?

horribleherk · Mar 26, 2020

I'm ordering 2 of these from jameco.com cob kits is out of dimmers & they offer the 50k that is supposed to dim 2 drivers I'm really wanting to dim these what will work ??? & where do you find it ? don't care if its a dimmer for each driver or not as long as it works people have coached me so far & thanks in advance

cobshopgrow · Mar 26, 2020

you maybe can order some 100K linear potentiometers ,dim one driver, or 50K dim 2 driver with your order.
best would be if they really reach 100k = 100% light output, order some more and test them with a multimeter.

horribleherk · Mar 26, 2020

Thanks for the reply I'm new at this so if I use one 100k per driver I'll get all the power when turned all the way up? cob kits is out of both 50k & 100k

Airwalker16 · Mar 26, 2020

horribleherk said:
Thanks for the reply I'm new at this so if I use one 100k per driver I'll get all the power when turned all the way up? cob kits is out of both 50k & 100k

To ensure you get all dat juice, wire a 10K resistor in line on the positive lead.

horribleherk · Mar 26, 2020

Airwalker16 said:
To ensure you get all dat juice, wire a 10K resistor in line on the positive lead.

Before the potentiometer or after? gotta remember I'm new at this ! when the parts get here I'll have a better understanding its for the hack I'm doing that's finally materializing

Airwalker16 · Mar 26, 2020

horribleherk said:
Before the potentiometer or after? gotta remember I'm new at this ! when the parts get here I'll have a better understanding its for the hack I'm doing that's finally materializing

Lol. Think about what you just said.
There's a pot with 3 poles. You will use the middle for positive and negative to whatever side you want to turn the knob to dim to 0.
If there's a resistor on the positive lead as I said, how else could you wire it? You can only put the resistor in 2 places really. On the neg or pos lead. Just throw it on the positive. Lol. That was funny.

horribleherk · Mar 27, 2020

Have never seen a driver (meanwell) or a dimmer I don't have either piece to look at yet

diyled · Mar 27, 2020

Airwalker16 said:
Lol. Think about what you just said.
There's a pot with 3 poles. You will use the middle for positive and negative to whatever side you want to turn the knob to dim to 0.
If there's a resistor on the positive lead as I said, how else could you wire it? You can only put the resistor in 2 places really. On the neg or pos lead. Just throw it on the positive. Lol. That was funny.

You know thats incorrect, probably not, as you most likely just googled it. Consistent bad advise.

cobshopgrow · Mar 27, 2020

horribleherk said:
Thanks for the reply I'm new at this so if I use one 100k per driver I'll get all the power when turned all the way up? cob kits is out of both 50k & 100k

yep, one 100k for one driver and youre fine.
these potentiometers do have variance, for 100% youll need at least 100k resistance.
you can put a resistor in line to asure there is enough resistance.

if you have a cheap multimeter you can simply test and see, its no rocket science.

Airwalker16 · Mar 27, 2020

cobshopgrow said:
yep, one 100k for one driver and youre fine.
these potentiometers do have variance, for 100% youll need at least 100k resistance.
you can put a resistor in line to asure there is enough resistance.

if you have a cheap multimeter you can simply test and see, its no rocket science.

I guess you're wrong too. @diyled likes to say we're wrong at least

Airwalker16 · Mar 27, 2020

diyled said:
You know thats incorrect, probably not, as you most likely just googled it. Consistent bad advise.

Well you can tell that to every person I've ever asked about potentiometer wiring.
Instead of being a shade throwing chump, why don't you EDUCATE US with the correct answer hmmmmm? I'm sick of your Shit.
I've been on this forum a lot longer than you. And I was one of the pioneers of the first heatsinkUSA/COB builds. I miss those days. People were so much cooler then...
I've word up all my single driver pots this way and have asked on the forum for confirmation that it was correct.
Guess you can blame @Rahz @Randomblame and the entire 3-in-1 dimming thread!

Rocket Soul · Mar 27, 2020

Calm down everybody. I do believe ive had knowledgeable people around (randomblame, god bless him) here recing using 110kohm, to get at that little bit of extra current in meanwell drivers. But then again i dont know what this does to driver longevity

Airwalker16 · Mar 27, 2020

Rocket Soul said:
Calm down everybody. I do believe ive had knowledgeable people around (randomblame, god bless him) here recing using 110kohm, to get at that little bit of extra current in meanwell drivers. But then again i dont know what this does to driver longevity

Wasn't aware they made a 110k ohm potentiometer.

Boatguy · Mar 27, 2020

Airwalker16 said:
To ensure you get all dat juice, wire a 10K resistor in line on the positive lead.

Resistance causes the dimming. No resistance = full power
Edit... i am so very wrong. Carry on.

Rocket Soul · Mar 27, 2020

Airwalker16 said:
Wasn't aware they made a 110k ohm potentiometer.

100k ohm poti plus 10k ohm in series.

But the AB driver should have internal dimming as well. I think someone said the screwdriver hole is underneath, on the bottom. Not sure.

Airwalker16 · Mar 27, 2020

Rocket Soul said:
100k ohm poti plus 10k ohm in series.

But the AB driver should have internal dimming as well. I think someone said the screwdriver hole is underneath, on the bottom. Not sure.

That's correct. It's on da bottom. Probably the driver is screwed down to the fixture and hadn't thought to check underneath because, why would you, is my guess? I still don't understand why the hell they would make the driver like that. It's so stupid and user UNfriendly.

Edit: he wants to order them but couldn't see any plug for a screwdriver. I guess I was half right.

horribleherk · Mar 27, 2020

cobshopgrow said:
yep, one 100k for one driver and youre fine.
these potentiometers do have variance, for 100% youll need at least 100k resistance.
you can put a resistor in line to asure there is enough resistance.

if you have a cheap multimeter you can simply test and see, its no rocket science.

thanks I have a multimeter

horribleherk · Apr 9, 2020

cobshopgrow said:
yep, one 100k for one driver and youre fine.
these potentiometers do have variance, for 100% youll need at least 100k resistance.
you can put a resistor in line to asure there is enough resistance.

if you have a cheap multimeter you can simply test and see, its no rocket science.

The light is together I found a deal on two hlg240h-54 b drivers & cob kits once again has 100k dimmers in stock I'm finishing my current grow with the light

cobshopgrow · Apr 10, 2020

great to see it working!
magically some big buds apperad too, haha.

M\W xlg-240h-AB how to dim ?

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