[sdiy] Photo PCB with projector? ( was : For breadboard lovers... )

[Tom Arnold]

On Thu, Jul 09, 2009 at 01:27:48PM +0100, Jason Tribbeck wrote:
> I got fed up with the print-and-peel method producing very poor results,
> and decided this was the way to go.

While I've gotten Press'n'Peel to work to some pretty insanely accurate
levels ( 144QFP ), its finicky.  You have to select your laser printer and
toner carefully, run the printer extra hot and extra dark, and use a heat
press not a laminator or clothes iron.  Anyhow, its doable but photo has
been more reliable and only marginally more expensive.

But, there is a question buried in here...

Has anyone tried exposing photo PCB using a projector?  A DLP projector
should have dark enough blacks to pull it off.   Someone has to have tried
this...

Before I had laser printers or easy access to offset printing equipment, I
would so my pcb layout 2 or 4 times oversize, then take a picture and expose
pcboards using an enlarger.  Worked quite well actually.    Always thought I
could skip several steps of the process if the computer drove the
enlarger...  and projectors are getting cheap...  ( hint : find an older DLP
project that takes the $200+ bulb and no one wants to rebulb.  Replace bulb
with multi-watt LEDs.  Hafta see if high power UV LEDs are available... )

-- 
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 - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
 - SynthGeek        -
 - BBD Fanatic      -  "...is it a virus, a drug, or a religion?" 
 - echo evho wjxo   -    Juanita Shrugs. "What's the difference?" 
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