Homebrew PCBs

A high resolution projector is 1024x768. At 6x4, that is about 180ppi,
give or take. As a comparison, most find that for toner transfer a
600dpi laser printer is the minimum resolution for fine traces.

Keep thinking out of the box.

Steve Greenfield

--- In Homebrew_PCBs@yahoogroups.com, "skippy_0410e"
<skippy_0410e@y...> wrote:
> ... Then yesterday I was watching 
> a presentation (Photoshop class) with a digital overhead projector 
> when it occurred to me the possibility of using that. Most of you 
> know or have read about homemade LCD projectors so, what if you 
> change the lens for something that is suitable for close up work? 
> Remember that an LCD OHP has to use all colours and here all we want 
> is black and white (i.e. light/no light) and if an LCD OHP can be 
> viewed with an image at 3m x 2m then surely a resonable resolution 
> could be had at 150mm x 100mm (6" x 4")? It's probably been tried 
> before and doesn't work but I just thought I'd ask anyway.
> Skippy