Tony Stark's Arc Reactor

thingiverse

Super simple, two part, low profile arc reactor made as an under the shirt Halloween costume. Shows clearly through a black thermal and only gets better as it gets dark out. Here is what you need: 1 battery pack (6V 4x AA) 24 LEDs 4 3x8mm bolts (glue or tape would also work) 1 strap (I cut a road bike tire in half for this) Tony Stark style facial hair A pocket for the battery pack Instructions Some steps: -It's a good idea to test the LEDs first to make sure they all work. -Bend the leads up and press the LEDs into the front part. Note: If it is a tight fit with some of them then lightly sanding the edge of the LED makes this much easier. -Tie every two LEDs together in series so they each get 3V. -Solder all the pairs together in parallel. -Attach a wire long enough to reach your pocket. -Attach the back part and add a strap. Adding a switch would be nice although not necessary. I wore it diagonally so it didn't move up/down.