The Time Machine Mk. V is an upgraded version of last year's Time Machine Mk. IV. It uses the same processor, but adds in a bigger battery, a serial port, and a debug port. The battery is a CR2032 which is four times larger than the Mark IV's CR1225 battery. A utility port allows for easy firmware upgrades and debugging. The Mk. V is better than the Mk. IV in almost every way, and I'm super happy with how it turned out. I also made a special blue and gold version, inspired by one of my dream cars, the Subaru WRX STI.
Please check out the links below the photos, especially my website! I put a full write-up there and I have some more projects you might like. Also, check out the short youtube vid, it shows some of the cool animations I've programmed into the watch!