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