[sdiy] DIY PCBs

[Grant Richter]

One quick trick to know about...

Normally you need a photo positive to expose the board. An acetate is the
professional method, but those are getting hard to come by (process cameras
going obsolete).

A laser print on overhead transparencies does not have dark enough blacks to
be reliable. However, I have had good luck laser printing on drawing vellum,
the frosted surface gives a much denser black. Still not as opaque as an
acetate, but good enough for one offs and photo silkscreen use.

BTW to silkscreen faceplates or boards, use 300 line silk, not the 150 line
T-shirt stuff. Photo silkscreens can use the same phototooling as
photo-resist and you can get screenable etch resist for short run, basement
manufacturing. Speedball makes photo emulsion kits you can get at most art
supply stores. It's takes approximately the same exposure as the
photo-resist.

> From: "Paul Maddox" <Paul.Maddox at wavesynth.com>
> Reply-To: owner-synth-diy at dropmix.xs4all.nl
> Date: Sun, 22 Jul 2001 22:29:05 +0100
> To: "Synth DIY LIST" <synth-diy at dropmix.xs4all.nl>
> Subject: [sdiy] DIY PCBs
> 
> Dear all,
> 
> The time has come, Ive had enough of stripboard to last me a life time..
> so I want to start makeing my own PCBs, BUT I need some advice..
> I live in the UK, I want to get the bits I need to do my own PCBs,
> 
> I know I need a UV box, and an etch tank what else do I need?
> And where can I get them from, at a decent price...
> 
> Paul
> _______________________________________
> Wavesynth home page;-
> Http://www.wavesynth.com
> Modulus synthesizers home page;-
> Http://www.wavesynth.com/modulus
> Waveterm C Project page;-
> Http://www.waveterm.com
> 
> 
> 
>