Michael B. just completed a beautiful B7971 based clock and four-letter-word machine based on a design by Peter Hand. (Once I can find more information on Peter's kit, I will post it here for the rest of the community.) In the mean time, find more information here and be sure to check out the rest of his amazing collection.
The Acrylic Nixie is more than a clock, it is a random four letter word generator modeled after the Ray Weisling creation called the Four Letter Word Clock. Unfortunately, Weisling has angered a lot of folks in the Nixie ‘community’ by reneging on numerous transactions, so his clocks are basically no longer available. The electronics used here are a kit designed by Peter Hand in Las Vegas, NV. IMHO this is a superior product to the original for several reasons. The design is much simpler (both clocks are multiplexed) and yet it is just as full featured as the FLW. It incorporates a SuperCap back up so you don’t have to reset the clock when the power is interrupted, it has an option whereby you can connect a motion sensor to turn the unit on/off when someone enters the room (essentially a tube saver), it actually has a larger word library than the FLW and it has some nice animated transition effects between words like a ‘slide’ from the top/bottom/right or left and a ‘razzle dazzle’ transition too.
(Images and text a owned by Miachel B. and used with permission. Thanks for sharing!)