ClickClackClock

This was a hobby project to create an impractically loud and large clock constructed from salvaged electromechanical seven-segment flip digits. To be slightly less obnoxious, the clock automatically sleeps in dark rooms, and wakes up with the correct time when exposed to light -- great for people who like to wake up with the dawn!

The flip digits came from a retired aquatics scoreboard/timing system. The segments change position when current is pulsed through a magnetic coil.

Software

Required dependencies:

More info TBA

CAD Contents

We designed custom 2-layer PCBs for this project using Eagle and fabbed them using OSHPark, with all through-hole components for ease of assembly:

• clock_driver_board: Drives a single digit, and can be daisy-chained together for as many digits as needed.
• __clock_motherboard:__ Slightly larger than the Arduino UNO but with the same microcontroller and pad layout for future shield compatibility. Integrates the standard DS1307 RTC on the board and controls the whole system - digit drivers, buttons, photoresistor, etc.
• __clock_system:__ Schematic that describes the overall system of PCBs and auxiliary components.

Assembly

The digits are supported in a frame made from MDF.

More info TBA