Homebrew PCBs

Ed Smith <w4eds@...> writes:
> What is your source for the LED'S, price, output frequency, etc. I
> am very interested in this type exposure unit.

I got mine off eBay from "BestHongKong" but they don't have any in
stock at the moment.  Look for 390-395 nm (smaller is better) and the
smaller the viewing angle the better, assuming you have enough LEDs
per square inch to expose everywhere on the film.