Is it digital, or is it analog? Well it's some combination of the two! The rack driven 7 segment display is a fully 3D printed mechanical desk piece that is equal parts satisfying and bewildering. Turn the top dial to rotate a series of 14 cams which push on a rack and pinion system to reveal a number. Operate is manually, or add a servo motor to the back and have the thing run on it's own.
You could even throw 4 of them side by side to create a clock! Add another two and get the seconds. Give one a randomized number generator and it becomes a dice! Endless possibilities!
This video shows you how easy it is to assemble:
https://youtu.be/OG50VaT9Jg0
The STL File:
Prints on all standard 3d printers, requires no additional tools or assembly, and assembles in seconds.
For servo attachment (not necessary), it used these servos: https://geni.us/G8ArjNg
For the clock, I used this Real Time Module: https://geni.us/rtKYLJT
This is the board I use to connect the servos: https://www.sunfounder.com/products/servo-control-board
Recommended print settings:
Layer Height: 0.2mm
Nozzle: 0.4mm
Infill: 15-18%
Total Material: ~190g
Can print on any sized 3D printer.
**All the files have been pre-oriented to save you some set up time! All you need to do is drop the parts into your slicer and hit print!
Rev 1 Change Log:
Changed "Detent.STL" and "Top Plate.STL"
Fixed issue where the C-Clamps on the Detent get in the way of the Top Plate sitting flush on the Back Plate by moving the detent pins in a touch.
Rev 2 Change Log: Added a folder that has cams with a slightly larger clearance if you're having trouble sliding the default clearance cams down the cam shaft.
Rev 3 Change Log:
Added Base Piece and two different connectors to connect the modules together (so you can build counters or clocks). Also added some sample code to the file package for arduino.
