Circuit Lake

Electronic Project and Circuit Collection

Motorcycle Universal Gear Indicator

09/11/2010 Category: Automotive, AVR, Digital, Display, Miscellaneous, Monitoring, Project, Sensor

The aim of project is to build a universal gear indicator that can be fitted to any motorcycle as an aftermarket accessory. Its operation depends entirely on the gear shift lever movement. This automotive project applicable for older motorcycle since it do not connect to speedometer and tachometer sensors. Main part of the project including AVR ATTINY25/45/85 microcontroller, a 7-segment LED indicator, small magnet placed on the gear shift lever and two Hall sensors that are attached to the motorcycle frame.

AVR project Motorcycle Gear Indicator

Vassilis Papanikolaou, project designer, explain that Universal Gear Indicator works as follow : ATTINY25/45/85 microcontroller reads the signals of the two Hall sensors and the neutral switch and outputs the current gear number to a 7-segment LED indicator, through a 4026 counter/decoder. Project firmware written in AVR-GCC (WinAVR) and can be programmed with the default fuses using an AVR programmer.

Download : Source Code, Schematic (Eagle, PDF)