I don't have a 3D printer but I wanted to have a go at constructive plastic fabricating. And, since my brother doesn't have girlfriend (and probably wouldn't want one), I thought someone should make him something nice for valentines day -- a 3D glowing heart, for example.
The heart is is made from (carefully) extruded hot glue, and it has a SMC LED powered by a CR2032. I was going to use a normal broach pin, but I have had some painful encounters with that species so I decided to use a small Neodymium magnet. Conveniently, the magnet also acts as a switch, clamping the power wire onto the battery.
This is my entry for the Valentines Day contest, so if you like it please Vote!
Glue sticks (1~2)
1 CR2032 (I got mine on ebay, $4 for 100 +$5 for shipping to Canada, a total of $10.15 for 100)
1 SMC red LED
1 tiny (super flat) neodymium magnet
1 medium size (1/2" by 1/8~1/16th" approx) neodymium magnet
1 small piece of wire
Cool, smooth surface for the extruding platform (I used a computer power supply case)
Oil (1 teaspoon)
Helping hands soldering helper
Water in a squirt bottle (for cooling)