• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Photoresist PCB's sunlight

Not open for further replies.


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


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.
Not open for further replies.

Latest threads

EE World Online Articles