Components for controlling LED panel

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1

Hi Core forum,

I have an LED panel that runs off 50-60V and 0.1-1A.

I am currently running it off a benchtop power supply with constant current and adjusting the brightness by increasing and decreasing current.

I would like have a panel mounted PSU inside the LED enclosure I am using instead of a separate PSU.

A buck converter unit has been suggested to me with voltage and current control.
However I do need one rated up to 60V. Does anyone have any suggestions?

I would also like to have a digital display that gives feedback on the current value.
The current value represents a particular light power output in mW and I am aiming to display this light power on the display as the current is adjusted.

Am I correct in thinking I need a rotary encoder with a display and a microcontroller for this?

Thanks for reading

2

Hi Alex,

Could you share a link to the LED panel you’re using? 60V seems crazy high, and hard to build something around :frowning:, at least from our parts.

Maybe you could get a prebuilt LED driver, replace the dimming pot with something panel-mounted, then add a current meter?

-James

3

Hi James,

Thank you for your help. I have no link as it is an R&D panel. It is rated up to 72V and 2.5A.

Thanks for the Meanwell link, I have been looking at similar drivers.

Is it possible to have a prebuilt LED driver interface with the Pimoroni HyperPixel 2.1 Round - Hi-Res Display for Raspberry Pi for example.
To give the user a way of selecting a particular current setting that corresponds with a Light Power Intensity that is shown on the display?

Thanks again

4

Hi Alex,

If you find out the pot value used, you could use whatever is drawing to your hyperpixel to control a digital pot:

A bit janky, but might allow you to do this without creating your own power circuitry

-James

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5

Hi James, Alex

In the “old” days (before all this digital stuff) in things like those big recording consoles they actually used tiny motors to drive the potentiometers. Might seem crude to-day but it worked.
Cheers Bob
Sorry about the link, I really meant to extract this bit of text.
“The problem with traditional potentiometers is the fact that your microcontroller doesn’t have an easy way to interface”

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