Re: TI-H: PCB

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: PCB
From: Greg Hill <gregh@xmission.com>
Date: Fri, 7 Aug 1998 10:03:57 -0600 (MDT)
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <19980807144821.6296.qmail@hotmail.com>
Reply-To: ti-hardware@lists.ticalc.org

On Fri, 7 Aug 1998, David Knaack wrote:

> >press that on top of the positive photoresist-treated board out in
> >direct sunlight for about 10 minutes.
> 
> Have you actually used that method?  I have read that you could do
> it that way, but I also read from someone else that it takes several
> hours to harden the mask using sunlight.

Yes, I have. I live near Salt Lake City, Utah (USA). I don't know exactly
what my latitude/longitude is (and therefore how much more/less intense
sunlight would be here as compared to wherever you're located), but I went
out on a bright summer afternoon and propped the thing up so as to face
the sun directly. You could buy a small board and cut it into smaller
pieces so you could try different exposure times to see what works best
where you're located.

-- 
Greg Hill
greg-hill@bigfoot.com
www.comports.com/link

References:

Re: TI-H: PCB

From: "David Knaack" <dknaack@hotmail.com>

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