[dorkbotpdx-blabber] Kicked in the Charlieplex part II.
aaron at bavariati.org
Mon Jan 8 13:04:25 EST 2007
On Mon, Jan 08, 2007 at 03:40:27AM -0800, Donald Delmar Davis wrote:
> So I went to my local dive after a week of having my son out engineer
> me (never mind the inherent emotional manipulatio) and I tried to
> reverse engineer the concept thinking that if I could drive 20 leds
> from a $1 cent tiny chip how many could i drive off of a 28 pin $4
> mega chip. I'll be damned if my napkin skills didnt fail me.
> experiment #1
> repeat the above all ye who still have their hair.
I still haven't, and I'm a freshly-minted BSEE. I blame PSU. ;)
> experiment #2
> Given a box of >1000 leds for free drive them.
> hc4049, 74hct595, 599 are all less than $1
Ooh! I like the idea of using the 595, since it's a shift register.
Drive your LEDs with serial!
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