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Repurposing LED torchiere LED light - 12V or 24V

duesentrieb

Jan 26, 2022
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I have a LED torchiere light that comes with a 24VDC power supply.
I wanted to get rid of the stand and just use the disc on top. In the process I had to loose the built in dimmer. When I reconnected the disc to the power supply the LED's blinked (and very bright). So, I wonder whether the dimmer essentially converted 24V to 12V. are such discs typically 12VDC?
IMG_0650.jpg
 

Martaine2005

May 12, 2015
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There isn’t really a typical voltage for these.
It depends on how many LEDs and what wiring configuration.
Can you show a picture of the ‘dimmer’ circuit?. I’m pretty sure it’s not a dimmer. More like PWM or a constant current circuit.
What is the current rating on the 24V adapter?

Martin
 

Bluejets

Oct 5, 2014
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It'll be a current limiting driver not a dimmer.
You've more than likely blown the whole shebang now.
 

duesentrieb

Jan 26, 2022
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Last edited:

Martaine2005

May 12, 2015
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From your first photo, it could possibly be 13 LEDs in series. If each LEDs Forward voltage is 1.8V, that would be 23.4V. Keeping the Amperage under 1A, 39 LEDs @ 25mA = 975mA.
But I doubt this is correct because of the missing driver circuit and resistor on the PCB which we know nothing about.

Martin
 

bertus

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Nov 8, 2019
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Hello,

It looks like three groups of 13 leds parallel in series.
I tried to change the colors to see the traces of the groups:
leds_on_plate_small_colorized_grouped.jpg
Bertus
 

duesentrieb

Jan 26, 2022
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interesting. So, what would be the drier/dimmer requirements?

I found this note in the specs for the dimmer with remote I posted (from Amazon)
Note 5:The SP-N12 LED DIMMER is a constant voltage controller and can only be connected to a constant voltage lamp. It is not suitable for constant current lamps. The controller indicator light appears red, indicating a short circuit. The controller indicator light appears yellow, indicating overload.So Please check clear with your lighting before you purchase our LED Dimmer. Please contact us if you have any questions for it. we will get back to you asap in 12 hours.
 

Harald Kapp

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Note 5:The SP-N12 LED DIMMER is a constant voltage controller and can only be connected to a constant voltage lamp.
Then it is very likely not suitable to drive your LED lamp as LEDS need controlled (constant) current, not voltage.
 
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