Gauntlet
I was actually dreading this part the most, because I wasn't sure how to tackle it, but it ended up being one of the highlights of the costume. I started by creating a cuff from PVC. I knew I wanted to backlight the display, so I ended up ordering a roll of LED tape, which worked perfectly. The tape is three red LEDs and a resistor in series, times 100 of those in parallel. It's set up for a 12V input, but I decided to use four of the 3.6V batteries (like I used in the lightsaber), so I had to add an 8ohm resistor to the circuit to compensate. I cut the tape into six inch sections, and soldered them together. I used some packing foam on top to diffuse the lights. I built a rectangular housing for the display, and used Bondo to seal everything together. I was going to cut out the text with a razor blade, but it wasn't as clean as I'd hoped, so I ended up printing a transparency and covering the display with plexiglass.
I plan on leaving the display because I like the way it turned out, but I'm going to split the battery pack in two and put half on each side so the gauntlet is approximately the correct shape.