Step Counter

StepCounter - code: All the code regarding the software
Doumentation: Schematic and PCB file.

Atmega32u4 based counter of steps with accelometer, sd card and oled display

Main features

Program runs on AtMega32u4 which has a USB port. After flashing uC with Caterina bootloader over ICSP pins, AtMega32u4 can be programmed over USB.
LiPo 3,7 V battery, can be charged over USB
Accelerometer ADXL335 with analog outputs for X, Y and Z directions.
OLED display for displaying data, can be turned off to maximise battery life.
SD holder, used to store data during development. Currently not used but can be used to save data about user (Saved sessions, multiple profiles, ect.)
For interfacing with SD Card, PetitFS library was used. If you want to know more you should check the website