Homebrew PCBs

On Sat, 30 Jun 2012 12:41:50 -0600, you wrote:

>I was thinking a single row of LEDs with the board being carried through by
>push wheels.  Not quite as snazzy as one LED/pixel, though more feasible
>perhaps.  Though, I don't really know how feasible it is to have a row of
>2000+ Individually addressable LEDs anyways.
>
>Although,  this does remind me of the 3D printers that harden layer by
>layer of plastic using a projector.  Though, it would mean we'd need a
>photoresist sensitive to visible light.
>
>Sent from my iPad
>
>

What says you can't space the LEDs farther apart across the narrow dimension and
place the board in a carrier? Then make multiple passes with the carrier along 
the long dimension stepping the LED assembly sideways a small increment each
 pass.  This would require good tolerance/repeatability on the long dimension (which 
wouldn't be difficult as it would only move back and forth). You get the same 
result as a high density line of LEDs, just slower.

Writing the driver software would be interesting too 8=)

If you are into machining think of the way an automatic surface grinder works.
Keith Bowers WB4LSJ- Thomasville, NC