Cyclotron mini: a battery-less cyclocomputer #Cycling
The Cyclotron mini is a battery-less cyclocomputer that uses a hub dynamo for both power supply and speed measurement.
As I frequently ride my bike after sunset, I needed a cyclocomputer that’s readable in the dark, i.e. has an illuminated display. This rules out devices powered from a non-rechargeable coin cell as a backlight would lead to unsatisfactory battery life. I also didn’t want yet another gadget that needs to be charged.
For the case, all parts were designed in FreeCAD and printed on a FlashForge creator pro 3D printer using PLA filament and TPU for semi-flexible parts.
The Cyclotron mini is based on the MSP430FR4133 MCU. The LCD is a DOGM081-A 1×8 character LCD with amber backlight.
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