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Subject: Re: [Homebrew_PCBs] Test pattern for tuning UV

From: DJ Delorie <dj@...>
Date: 2014-04-14

James <bitsyboffin@...> writes:
> I couldn't find a simple small test pattern in a usable (gerber) format,

I have more if you need them:

http://www.delorie.com/pcb/spirals/
http://www.delorie.com/pcb/bloat.gbr