There is an ISP header on the back of the board you can use with a pogo-pin adapter and an AVR programmer if you change your mind. You pick which firmware you like when you buy. There are also five different "alternate timebase" firmware files available, each of which ticks regularly, but with a longer or shorter daily tick count. They range from subtle to straight-up clown-car crazy, but each will still tick a total of 86400 times a day. Alternative hands and other useful accessories can be obtained from Klockit.Įight different "novelty" firmware files are available, each with a different sort of craziness. It's a perfect substitute for the clock movements that come with custom clocks designed at Zazzle (their hands will fit on these movements, and the 12 and 24 hour movements both fit on their faces). You have a choice of either a standard 12 hour movement (one complete rotation of the hour hand every 12 rotations of the minute hand) or a 24 hour movement (one complete rotation of the hour hand every 24 rotations of the minute hand). The movement will come with a threaded shaft with a maximum face thickness of 1/4" and plain black hour and minute hands and a red second hand. If you buy the complete movement, you will get a modified and tested movement, ready to install in the clock of your choice (a clock face is not included, but attachment hardware is). There's an instructional video above that illustrates the process. You should be able to fit the Crazy Clock controller in some unused space inside the movement and it will look completely normal. Then connect the stepper coil to the clock terminals on the Crazy Clock board, then wire the movement's battery terminals to the battery terminals on the board. If you buy the board by itself, you must obtain a suitable clock movement and disable its controller. The clock should be accurate to within about 30 seconds per month (☑0 ppm, typical for these sorts of clocks). The board (and in turn, the clock movement) is powered by a single AA battery, which should last around 12 months or so. This board will alter the timing of the pulses that move the second hand in various ways (depending on the firmware), while still maintaining a long-term average rate of one pulse per second (which is required for the clock to remain accurate). They typically are in black or clear plastic inch-and-a-half square boxes with a single AA battery holder and have second hands that jump from one second to the next. These type of clock movements are ubiquitous in cheap wall clocks. This is a replacement controller board for a lavet stepper motor driven clock movement. Simply use the menus above to select the movement you'd like. The Crazy Clock is available with Sidereal, Martian, Lunar or Tidal clock firmware, in 12 or 24 hour movements. When my current inventory is exhausted, there will no longer be 24 hour movements available (this does not impact 12 hour movements). Primex/Klockit have discontinued the 24 hour Q-80 movement.
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