16 Jan
2004
16 Jan
'04
2:13 p.m.
I just had to replace some SMT leds, in 0402 packages.
Thats quite small.
Rob O'Donnell wrote:
At 04:43 16/01/2004 -0500, der Mouse wrote:
Actually, I'm a bit interested in the other
direction: how _small_
do/can LEDs get? (And how much heat do they produce?) I've been
pondering something, but in order for it to be workable I need to be
able to cover fairly large areas with some kind of display technology
at a resolution no worse than about 75dpi. Since "large areas" means
dozens of square feet, too large for a CRT, all I've been able to think
of are LEDs. But I don't know how practical (or more likely how
drastically impractical) that is.
I remember building a LED matrix as a project when I was an apprentice
(for Ferranti Computer Systmes). 8x7 LEDs, driven by the 8-bit
parallel user-port on a BBC B. Made some nifty patterns, as well as
scrolling text, etc. I still have it, but not sure I can find my
software now.
Anyway, a quick google turned up a mfr that does LED matrix modules.
This one looks close to your dpi requirement
http://www.okaya.com/HP3/image/RG160160-C.pdf (if I am translating 160
dots in a 63.5mm wide module correctly) you might have to deal with
the 'margin' though. But I am sure if I find a hit that quick, there
will be others about.
Rob