The Singularitron is a massive wrist-mounted wearable device with four expansion slots. Equip any combination of flashlight, laser, IR thermometer, environmental, and SD card modules, and stun the crowd with RGB buttons. The ultra-bright, extremely breakable VFD adds bright-daylight readability... and style.
Real talk, this does work, but is not intended to be a serious project. A VFD is a terrible choice for a wearable, and many parts of the project are suboptimal, ridiculous, and/or barely functional. Also, I made a bunch of boo-boos on the board and fixed them with airwires. I'll fix that some time, maybe.
That said, it does work, and it serves its purpose - drawing attention at Meetups and conferences - really well. The cartridge form-factor is pretty cool, and this has neat super-small implementations of some interesting parts. Have fun!