jazda a free bicycle computer

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Videos

I made a video of the computer in action, showing all the functions, specifically speed calculation, all module values updating, speed & modules behavior on stop, common counter reset. You can hear double clicks at each module switch, this is due to using a salvaged button panel with resistors connected to buttons.

Screen shots

Please note that the project is at an early stage and values are shown without commas!
The default unit of speed is km/h and the last digit is the fractional part.
The default unit of distance is km and the fractional part is last two digits.
Both plots are capped at ~51.2 km/h.

Screen fresh after poweron, all values set to 0. From top to bottom: the big 00 is the speed, the 1 is a debugging value, module list with "DIS" highlighted, distance since last counter reset

Distance module after traveling 360m

Stopwatch displaying 1min 13sec since restart, speed meter at 12.9 km/h

Debug module which currently is blank but activates the backlight

Maximum speed = 32 km/h

Average speed displaying 14.9 km/h and some debug data

Speed vs time plot