Powering DMD from 12v battery

The Dot Matrix Display (DMD) is a 32x16 array of high-brightness LEDs for visually striking effects. [Product Page]
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Powering DMD from 12v battery

Post by taptotweet » Sun Jul 22, 2018 2:13 am


I need to power 32 red dmd panels from a 12v battery bank. I need about 12 hours of runtime with the other 12 having the batteries recharged through a solar array.

What is the best way to power these panels? I can't find any high capacity 12v to 5v converters. Is my only option to have a 240v inverter and use the 40a 5v PSUs?

I hope this makes sense. Thanks for all your help.

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Re: Powering DMD from 12v battery

Post by stryker » Sun Jul 22, 2018 3:26 am

On an old project we used multiple 12V-5V power supplies for an array of DMD powered from 12V car batteries in parallel. I sourced these PSUs from eBay but can't see a similar listing as I searched just now. They were metal-cased, potted and waterproof.

What I do see are these, which look like they'd be perfect, and far cheaper than the ones I originally used: https://www.ebay.com.au/itm/DC-to-DC-Co ... Desc=0%7C0

I'd suggest one of those for each DMD, if you select those.

Cheers, Geoff

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