[dorkbotpdx-blabber] How many LED's can I run off of an atMega644p?

[Eric Garner]

The shift registers that dan is ordering this week are a nice option  
too(sorry I don't have part numbers, there's no copy/paste on this  
thing)

Sent from my iPhone

On Mar 9, 2009, at 3:11 PM, Daniel Johnson <teknotus at gmail.com> wrote:

> I'm interested in making a POV type device, and I was looking at the
> many pins of my atMega644p, and thinking that it would simplify the
> design a whole lot if I could just direct drive the pins.  After
> looking at the manual it looks like the max current draw for the whole
> device is 200 milliamps, but dividing that by all the pins drops it to
> around 5mA a pin which by my understanding would be a very dim LED.
> What would be a simple way of keeping the premise of turning on/off 8
> LED's at once by writing a byte to a register, but increasing the max
> current draw?
>
> -- 
> teknotus
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