Josiah, the creator of the Coachella Lamp has also submitted two, very nice, B7971 GeekKloks. These are based off of the Zetalink** kit and known for both the enormous B7971 tubes as well as the...inventive...time display font used. Josiah did a great job with both of these clock. The first is mounted in a traditional desktop display while the second clock has the PCB behind the display for wall mounting.
The clock is powered by a 16v power supply. There is an on board DC-DC power converter that is used to power the clock & B7971's. Sadly, this design requires an obsolete MAX771 switch-mode power supply. Time is measured against the local mains reference but these clocks do include an internal RTC to guard against a power failure. The display itself is multiplexed (as opposed to directly driven.) Given that there are 15 segments per tube, this isn't surprising :)
Other features (according to manufacturer)
- 50 different number fonts (character sets) to choose from.
- Fonts include number variations, distorted numbers, contorted numbers, fanciful numbers, etc.
- Time can display using animated characters. Clock optionally shows seconds on underline segments, simulating a left-to-right progress bar (2 variations)
- Special fonts for Roman (digit by digit) , true Arabic, Chinese/Japanese, and Klingon numerals.
- Other "secret" fonts available for "private" reading capability
- 12- or 24-hour clock modes available. In 12-hour mode leading zero can be blanked or allowed to show.
- Alternate time zone display can alternate with main display at different rates, and can use any alternate font.
- Date can use any alternate font to help differentiate it, and can be displayed at different rates or turned off.
- Date displayable in DD-MM or MM-DD (numeric) format.
- Time Setting and User Preference register editing can be locked out by DIP switch setting.
- 35 User Preference Registers control options and settings, use mnemonic names for editing.
- User Preference Registers and Font Use Settings can easily be edited.
- Date or alternate time zone display can also use one of several display variations (wink, spasm, etc.)
- Serial (RS232) input to set time, or control blanking and font selection.
- Serial (RS232 or direct) output can be used to make chime tone modules or alarm modules.
- Accessory jack for seconds display module (intended for smaller numerical nixies, no font changes available).
**Read this before even considering placing an order. It appears that no one has received merchandise that they paid for Raymond since 2005. From Jeff: "Do Not believe that you might receive any paid-for products from Raymond Weisling. Although the zetalink cover page notes that he is temporarily unable to deliver, the swreg shopping cart is fully operational and will accept your payments!"