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

[Daniel Johnson]

On Mon, Mar 9, 2009 at 3:43 PM, Eric Garner <garnere at gmail.com> wrote:
> 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)

What Hans is talking about seems to be a shift register with a
programmable current limiter so that you wouldn't need to have a bunch
of resistors between the outputs, and LED's.

I was thinking more along the lines of an 8 bit parallel latch,
buffer, register thingamajig.  Just needs to up the current on each
pin.  I have but one SPI interface, and then I have around 30 other
unused pins if I am going with the shift register route.  I guess that
is okay, but it isn't the solution I was looking for.