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And for materials:
thin brass sheet
plastic sheet ( I used Delrin- you can buy Delrin and acrylic sheet from Colorado Plastics)
clear acrylic sheet
copper wire- 22ga and 24ga thickness solid wire
sheet metal- 22ga thickness (.025in or about .5mm thickness)
PCB (printed circuit board)- at least 4" square (Radio Shack sells some that measures around 4.5" x 6")
several small bolts - I used 10ea 2.5mm bolts and 3ea 3mm bolts w/nuts
3 volt battery
11 ea NTE30027 surface mount LED's - I bought them from a local supplier but you can order them here: http://www.cablesandconnectors.com/30000-30.HTM
battery hook up wire
As an option for LEDs and making a circuit board you could use these instead-
http://www.sparkfun.com/commerce/product_info.php?products_id=8735
I'll make specific notes about the materials used and possible substitutes/workarounds on the specific construction pages.
Please note: be careful cutting sheet metal as the edges can be very sharp and it's pretty easy to cut yourself.
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