Arduino's ampère maximum

Hello,

I’m building a led cube (8x8x8) with arduino, but it needs at least 10A to light all the diodes. I heard arduino only supports 40mA at each port. Is there a way to boost this?

Greetings

If by port you mean pin, it's 20mA for practical purposes; 40mA is at the "too late" stage.

So you'll need an external supply and use the Arduino to do the switching, not the powering.

Thanks for your quick reply

Daniel_forknive:
Thanks for your quick reply

Unfortunately I can't help any further, since I've never done a project using 500-odd leds.

If nothing else, my soldering skills are not up to that.

You may find 20mA per LED is far too bright if they are high efficiency types, in other words you may get
away with lower current supply, its worth doing some experiments now to determine this.

Yes, The Arduino is limited to 20mA or so per pin, and there are further limits per supply pin and
per group of pins (by port I think), the datasheet has the details.

As you’ll be multiplexing you’ll be needing switching devices that drive many LEDs simultaneously,
so you need to figure out the mutiplexing scheme to decide what current ratings are needed.

MarkT:
You may find 20mA per LED is far too bright if they are high efficiency types

I've found even 6-8mA can be enough, at least for indicators.