DJ Delorie wrote:
> Just finished wiring mine up...
>
> http://www.delorie.com/pcb/uvled/
>
> I layered the LEDs between two sheets of plywood hoping they'd keep
> things aligned, but not quite good enough I suppose. Time to fiddle I
> suppose.
>
> I happen to have a lab-grade timer to run it with, too.
>
Nice work
Whats the grid pitch ?
Whats the LED brand/model ?
I'm interested in your exposure times. I get 60 seconds with negative
dry film, grid density 0.28 LEDs/cm^2, BestHongKong 390nm UV LEDs at
20mA, about 100mm PCB to LED gap, measured with inkjet transparency +
5mm window glass in light path.
Adam