Homebrew PCBs

DJ Delorie <dj@...> writes:
> If you use LEDs, you still need a current-regulated power supply, and
> the more LEDs you use, the bigger the power supply (watts) needs to be.

Just for yuks I priced out a "new and improved" UV exposure box like my
old one, depending on how picky you are about eBay sellers...

$40 for bulk UV leds on eBay (qty 200)
$20 for 48V switching power supply on eBay
$8 for 16 LM317 regulators (approx 16 strings of 13, 0.32 amps total) at digikey
$1 for 62 ohm resistors for the LM317's

plus the pcbs, box, etc.