Dimming diy leds

Hey,

I have a 185w diy light with samsung lm301h strips run on a mw driver driven at 1050ma, with a mw 100k dimmer. If i add 15-20w oslon 660nn strips driven at 350ma with a seperate timer...can I then plug the 660nm unit into the same dimmer so the lm301h lamp will be the control unit and 660nm so both lights will be powered at the same intensity %wise when both lamps are turned on???

Dankula said:

Hey,

I have a 185w diy light with samsung lm301h strips run on a mw driver driven at 1050ma, with a mw 100k dimmer. If i add 15-20w oslon 660nn strips driven at 350ma with a seperate timer...can I then plug the 660nm unit into the same dimmer so the lm301h lamp will be the control unit and 660nm so both lights will be powered at the same intensity %wise when both lamps are turned on???

Click to expand...

What if your ran a splitter off the dimmer?

I guess that what i was attempting to ask...would be so reassuring to know that the 660nm would always be at...say 10% to the 3500k...one nob is enough to fiddle with haha

Dankula said:

Hey,

I have a 185w diy light with samsung lm301h strips run on a mw driver driven at 1050ma, with a mw 100k dimmer. If i add 15-20w oslon 660nn strips driven at 350ma with a seperate timer...can I then plug the 660nm unit into the same dimmer so the lm301h lamp will be the control unit and 660nm so both lights will be powered at the same intensity %wise when both lamps are turned on???

Click to expand...

can you draw a diagram? where you going to put the second ps? sounds like you are trying to run in serial but you cant do that at two different currents.

I basically just want to know if i can dim 2 lights with the same dimmer eventhough they run on seperate drivers

Dankula said:

Hey,

I have a 185w diy light with samsung lm301h strips run on a mw driver driven at 1050ma, with a mw 100k dimmer. If i add 15-20w oslon 660nn strips driven at 350ma with a seperate timer...can I then plug the 660nm unit into the same dimmer so the lm301h lamp will be the control unit and 660nm so both lights will be powered at the same intensity %wise when both lamps are turned on???

Click to expand...

I didn't know mw sold a 100k pot/dimmer, can you post a link?

To dim two mw drivers use a 50k pot (potentiometer) rather than 100k.

Dankula said:

I basically just want to know if i can dim 2 lights with the same dimmer eventhough they run on seperate drivers

Click to expand...

You could with PWM, but not resistive dimming.

1212ham said:

I didn't know mw sold a 100k pot/dimmer, can you post a link?

To dim two mw drivers use a 50k pot (potentiometer) rather than 100k.

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Itmight actually be for mw rather than mw branded

That shop have some nice lm301 strips


And a nice calculator that includes the led-tech panels

The answer may be here. Iirc the thread got very argumentarive, anything stardustsailor post should be ok, hes a super OG of this led diy stuff.

7CardBud said:

You could with PWM, but not resistive dimming.

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PWM, 0-10v and resistive dimming can all be used. For resistive dimming, the pots resistance needs to be 100K divided by the number of drivers.


Cheap 0-10v dimmers. Buy a spare, they can fail.

I use this. It is 0-10v, but they mistakenly call it a potentiometer.

I have had this potentiometer since 2018 and it hasn't failed yet..
You would need the 50k version for two drivers though.

Dankula said:

I basically just want to know if i can dim 2 lights with the same dimmer eventhough they run on seperate drivers

Click to expand...

Are you saying you can do like this--

driver1------------ ------------light1 1A
******************dimmer
driver2------------ -------------light2 .3A

with both drivers hooked up to the same input and output on the dimmer?

I'm missing something. I'm no expert but I don't think you can do that. You're going to overdrive

(edit: cant draw this diagram right with riu ignoring my spaces)

1212ham said:

PWM, 0-10v and resistive dimming can all be used. For resistive dimming, the pots resistance needs to be 100K divided by the number of drivers.

MeanWell LED Drivers: 3 in 1 Dimming Function.

100k potentiometer Wire post #1 to blue wire Wire post #2 to white wire This is how mine is wired and works OK

www.rollitup.org

Cheap 0-10v dimmers. Buy a spare, they can fail.

https://www.amazon.com/s?k=0-10v+dimmer&s=price-asc-rank&link_code=qs&qid=1687980544&sourceid=Mozilla-search&tag=moz-us-20&ref=sr_st_price-asc-rank&ds=v1%3AHJ1D3Sfn5DXCnxKci7Mc6KXl85Nmkko0DjJnPFKiBTk

I use this. It is 0-10v, but they mistakenly call it a potentiometer.

Cased Potentiometer with Knob

.

rapidled.com

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They call it a potentiometer because it is a potentiometer and actually none of those that you linked are 0-10v dimmers.

Sinfor said:

They call it a potentiometer because it is a potentiometer and actually none of those that you linked are 0-10v dimmers.

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So all the 0-10v dimmers listed on amazon are really just pots? How did you came to that conclusion? What resistance are they?

That 0-10v dimmer from rapidled is listed under 0-10v dimmers.
It has a circuit board with the following SMD components, 2 resistors, 1 capacitor, 1 diode and 1 transistor. Obviously more than just a pot.
The pot on that circuit boards is 500K, Meanwell drivers require a 100k pot.
It is polarity sensitive, pots are not.

R1 looks like a pulldown, so my guess would be some sort of voltage divider circuit.

A 0-10v dimmer is in simple terms a variable power supply (0 to 10v AC-DC or DC-DC), if you measure the voltage across its terminals in the one you have you won't be able to measure anything cause it is not a power supply.
The point when using the 3 in 1 dimming function is to drop the voltage across the leads.
Inside the Meanwell driver there is a IC which provide a constant current source of 100μA(0.0001A), when you connect a potentiometer and adjust it to let's say to 50kOhm, the voltage across the dimming leads will drop to 5V(0.0001Ax50000Ω=5V), if you add a 5VDC this will be the voltage across the leads, in the same way a 10V PWM signal at 50% duty cycle will drop the voltage to 5V, this voltage is sensed by the IC which send a signal to the PWM controller on the high side of the driver to adjust the duty cycle and consequently the output current.
I can't see clearly the circuitry of yours but looks like the transistor is used to chop the voltage from the dimming leads(like a digipot), definitely it's not a 0-10V dimmer.
This is how a 0-10V dimmer looks like

Sinfor said:

I can't see clearly the circuitry of yours but looks like the transistor is used to chop the voltage from the dimming leads(like a digipot), definitely it's not a 0-10V dimmer.

Click to expand...

And it's definitely not a potentiometer. Might be a gizmo.

How can the question be answered without the proposed circuit diagram? Shit, why not just buy another dimmer?