Ok, its not the biggest GPS Clock
ever built - but its big on a scale of normal "indoor clocks"
The segment displays are physically 4 inches tall, while the whole project is a little over 6.5 inches in height.
The project is really quite simple - there's a GPS module at the core that has excellent gain (for indoor reception), 4 segment displays, and a controller board. Here's what's inside:
The code is still in its early stages (completely stable, I'd like to add more features) - for more info about parts/source code/schematic - check out the project write up at Digital DIY: Big GPS Clock