Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: [Homebrew_PCBs] Setting exposure with a step gauge
From: DJ Delorie <dj@...>
Date: 2009-06-02
So get a PCB with film, cut it into strips the width of your step
gauge, and do a binary search of your timer's range ;-)
Really, if you have a step gauge, you don't need to ask any more
questions - do ANY exposure with the step gauge for some time, and
based on the results, calculate the "right" time. Since it's
logarithmic, any reasonable time is an acceptable starting point.