[dorkbotpdx-blabber] another LED array question

[Mr.T]

if you don't mind clocking them at a mere 15 MHz you can cascade all 5 of 
them and only use 4 pins of your arduino

-eric

> hell yeah!  five of those would totally do the trick.  i guess i'd have
> to address all five via serial, which would take 10 pins of an
> arduino.  (i assume there's some library for Arduino that lets you
> make a serial port out of any two pins plus ground, right?  and
> maybe that can be just one pin, since i'd only be writing.  assuming
> i never cause software flow-control to happen.)
> 
> but yeah: soldering SMT would be a bitch.  but the PDF says there's
> a DAP package and a QFM package too, no?
>