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

[dan p]

Glad to hear that what I am ordering would be good for this application, as
it pretty much is what I am planning on planning on doing something clever
with in the someone murky future...

Or they will look good on the ever growing pile of misc parts that is
filling up my work area...

On Mon, Mar 9, 2009 at 4:07 PM, Daniel Johnson <teknotus at gmail.com> wrote:

> 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.
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