by MyDogJustice, published
My latest obsession has been collecting, and subsequently photographing silver coins. Coins have been one of the hardest subjects I've photographed. Its just the begining of a long process, but I wanted to design something that would give me consistent, even and low angle lighting all the way around the coin. Quick Rhino design later, some soldering and I'm in business! Simple electronics, simple print, stunning results! Gives a nice focused light at the center. The coin pics I've included were actually shot with a webcam. It was the easiest solution and provided the fastest feedback. Eventually I'll get out the big rig and take some really hi-res images. There is a cutout archway for sliding in coins that are already in graded slabs and an optional pedestal for open coins.
This light doubly functions as an odd little look through flashlight. I've used it quite a few times in the network closets already!
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The parts I used were bought locally at Radio Shack. Total $12, so you could certainly do it for half the cost if sourced online. (I'm too impatient)
4 - 5mm white LEDs 1 - soft touch spst switch 1 - 9V pigtail 1 - 9V battery 2 - 5mm x 25mm bolts and nuts 1 - Each of the included stl models. (You'll need to enable support when printing the innerRing.stl Resistors, wire, heat shrink as needed.
I also used Elmer's Tack. Its a removable Adhesive putty thats going to replace my hot glue gun. Soooooo much easier to work with. repositionable, sticky, insulates.
Use http://ledcalculator.net/ takes all of the math out of the equation!! Put in the values for your LEDs and it spits out the needed resistors. I've got my LEDs way undervolted because they were a bit to bright. Maybe the second version I'll add a potentiometer.
Dimensions: Outside: 130mm Inside: 90mm Height: 30mm LEDs are at 20mm from the deck Pedestal is 15mm high
Check out my dropbox for more photos: https://www.dropbox.com/sh/a6spp8tg14nes7k/QcrdbozHM6/silverLight