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I've created a special microcontroller driven LED display which I need power supply for. The display uses 24VDC and draws any current between 0 and 8 amps depending on how many LEDs are illuminated. Most of the time it's not illuminated and only microcontroller needs a little power.

So far I've used a battery charger as power supply for testing but I will need a proper power supply for it. The power supply needs to be weatherproof as it's going to be installed outside.

But it's very hard to find this kind of power supplies. So far I've found some LED power supplies like Mean Well HLG-240-24. Can I use this kind of power supply for my project? I think not as it's a constant current supply. Am I right? What other options I have?

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closed as off-topic by Eugene Sh., Leon Heller, Andy aka, PeterJ, W5VO Dec 15 '15 at 5:22

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  • \$\begingroup\$ 8A for LEDs ??? Wow.. Offtopic, anyway. \$\endgroup\$ – Eugene Sh. Dec 14 '15 at 15:19
  • \$\begingroup\$ 8 amps? Almost 200 Watts? \$\endgroup\$ – Passerby Dec 14 '15 at 15:20
  • \$\begingroup\$ That's right. There are over one thousand LEDs in the display. \$\endgroup\$ – Kestis Dec 14 '15 at 15:33
  • \$\begingroup\$ How about sticking a non-weatherproof power supply in a weatherproof box? Just ensure it doesn't need ventilation. \$\endgroup\$ – Simon B Dec 14 '15 at 16:44
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Without directing you to a specific supply, you already know most of what you need to find.

Outdoor rated supply, so you want one with an IP rating of 66, 67 or 68.

Constant Voltage, as you need variable output.

Since you need 24v at 8 Amps (195 Watts), adding in a margin of safety, look for a 210 Watt or higher supply.

If you are willing to add in a switching voltage regulator, you could look for a higher voltage supply and regulate down. 48V 5A for example.

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