longboard-speedometer

A simple Arduino based longboard speedometer.

Part list:

• Arduino pro mini
• 4 digit 7 segment 0.56 inch display (I used HS420561K-C30, but other 0.56" 12 pin displays should work just fine)
• TP4056 based li-ion charging circuit
• Li-Po battery
• Reed switch (Although I recommend getting a hall sensor instead)
• 2 state switch 14 x 9 mm
• Magnet
• Something to program the Arduino with

Useful pics

Pin connections
pin 2 - pin 7	top row of the display pins
pin 12 - pin 17	botton row of the display pins
pin 10	sensor data
ACC	sensor VCC
GND	sensor GND
VCC	power +
GND	power -