- Cool glowing blue tube with 8 digits and alarm on/off dot
- Adjustable brightness
- Alarm with volume adjust
- Precision watch crystal keeps time with under 20ppm (0.0002%) error (< 2 seconds a day). Pretty much every time-keeping clock in your house runs on 20ppm (or so) crystals. if you look on your computer motherboard you'll see one there.
- Clear acrylic enclosure protects clock from you and you from clock
- Battery backup will let the clock keep the time for up to 2 weeks without power
- Selectable 12h or 24h display
- Displays day and date on button press
- 10 minute snooze
- Integrated boost converter so it can run off of standard DC wall adapters, works in any country regardless of mains power
- Great for desk or night table use, the clock measures 4.9″ x 2.9″ x 1.3″ (12.5cm x 7.4cm x 3.3cm)
- Completely open source hardware and software, ready to be hacked and modded!
Complete kit comes with a 110/220V 9VDC power supply for use worldwide, all components including PCB, vacuum fluorescent tube, backup battery and a clear acrylic enclosure. Assembly is required! This kit is made of through-hole components but is best built by someone with previous soldering experience as there are many parts and steps.
For assembly instructions, user manual, code, schematics, and more, please visit the Ice Tube Clock webpage! There is also a design document describing the hardware, which is worth checking out as there are a few cool hacks involved in this design. One is an onboard open-loop boost converter that uses a microcontroller PWM pin to generate 60VDC to light the tube. Another is code for a microcontroller-only low-power RTC that runs at only 50uA without the need of an external RTC chip.
The kit is now available in the Adafruit store.