Bob Edmiston is a maker based in Seattle, WA. He volunteers with http://seattlegreenways.org/ and is part of a small skunkworks team inventing covert Arduino-based DIY bicycle and pedestrian counters for use by volunteers throughout Seattle.
I basically took the four Nixie modules and the acrylic backing board to make the four module clock. Then, I modified the Nixie Clock sketch to display the time from the Tiny RTC onto the four modules. Then, I refined the timing and cycling of the colors so it is smoother and more subtle. The fine wood box is a second hand Japanese shipping case purchased from a local gift shop for $10. It was empty on a dusty shelf in the warehouse. The coaxial power jack is from Radio Shack. 3M dual lock was used for all the mounting of the components for a clean floating shadowbox look. The Arduino is a SparkFun Redboard, because, well, it's Red and looks great.Arduino sketch for Download: Nixie clock.ino (Bob, thanks again)
List of hardware you will need: