Homebrew PCBs

Probably depends on your latitude to some extent, James but 6 minutes 
might be too short an exposure.

I have used the method a couple of times but it is very hit or miss. For 
example, a cloud can drift over and greatly reduce the amount of UV 
light available, even on a bright day. Actually on my last attempt, one 
of the family cats decided that the exposing pcb would be a good place 
to take a nap, totally ruining the exposure.

At my latitude, around 41 degrees South, I was using times more like 15 
minutes, from memory.

Bill

On 8/05/2011 9:01 AM, James English wrote:
> Hello, I'm new to this group, though not new to electronics.  Does anyone out there have experience with exposing a photosensitive board through a negative to sunlight?  A man at Injectorall told me that about six minutes at noon on a bright sunny day but that doesn't seem to work.
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