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Photoresist PCB's sunlight

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Ragu97

New Member
Hi can I expose a presensitized PCB to sunlight instead of UV lights? If yes, for how long? :)
 

picbits

Well-Known Member
Depends on the UV content of the sun / where you are etc.

Just do a test strip on a board - take a board and a black piece of paper, expose for 1 minute, move the paper an cm or so exposing more board, wait another minute and repeat for maybe 20-30 minutes - you can then develop your board and see where you get the sharpest results.
 
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