Things used in this project

Hardware components:
CLV1A-FKB
RGB LED
×1
Mma8452q
NXP MMA8452Q Low-Power Accelerometer
Optional. It is difficult to solder
×1
11084 01
SparkFun Altitude/Pressure Sensor Breakout MPL3115A2
Optional. MPL3115A2 is difficult to solder.
×1
BL600-SA
Optional. It is difficult to solder. Bluetooth Low Energy module
×1
Freescale k2 series ph%20(1)
NXP Kinetis K2x USB MCU
MK22DX256VLF5
×1
Allegro a1324lua t image
Hall Effect Sensor
A3213LH
×1
Microchip MCP73832T-2ACI/OT
LiPol battery charger
×1
MC74HC595ADTR2G
×1

Custom parts and enclosures

Mechnical Design
OpenSCAD files for 3D printer.
PCB Mounting Frame
It is possible to mount the PCB direct onto the wheel spokes but it is better to use a mounting frame.
http://veloblingbling.ch/twiki/bin/view/Velo/FrameDesign
Frame full

Schematics

Schematic
see
http://veloblingbling.ch/twiki/bin/view/Velo/ElectronicDesign
Ewheel32 sch 1
Electronic Design
The PCB is a multi-layer (4 layer) 160 x 30.5 x 1.6 mm FR4 board.

Code

Main MCU Firmware
Firmware written in C. No OS, bare metal. IDE: Kinetis Design Studio Integrated Development Environment. Target system is a proprietary PCB (eWheel32 V1.4 and newer) with a MK22DX256VLF5 MCU from Freescale/NXP.

Credits

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