Bike Computer V0.1 Build

Bike Computer Back

Bike Computer Front-1

nabil’s blog: Bike Computer V0.1 Build.

I’ve build the first prototype of my bike computer and have been developing the firmware for a couple of weeks now. Everything except the temperature sensor, accelerometer, servo headers, and Li-ion fuel gauge have been populated.

There have been a few minor electrical bugs like forgetting resisters for the ISP programmer, but nothing too difficult to fix for the next prototype. The bigger problems have appeared in the software world. First, the I’ve filled all 32K of the ATmega memory mainly because of lengthy sensor configurations, USB libs and FATFS. Second, RAM has become an issue when processing things like NMEA strings or drawing complex graphics. I’ve realized there is no point in having a vibrant TFT LCD screen if the 16MHz ATmega can only achieve millisecond refresh rates, which is why I’ll probably switch to some ARM processor for the next prototype. Maybe I’ll go with the STM32F4 series.

Nabil was on our recent show-and-tell, this project is awesome!


Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat and our Discord!

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Join over 38,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 11/15/2024 Featuring Adafruit bq25185 USB / DC / Solar Charger with 3.3V Buck Board! (Video)

Python for Microcontrollers – Adafruit Daily — Python on Microcontrollers Newsletter: A New Arduino MicroPython Package Manager, How-Tos and Much More! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

EYE on NPI – Adafruit Daily — EYE on NPI Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

Adafruit IoT Monthly — The 2024 Recap Issue!

Maker Business – Adafruit Daily — Apple to build another chip at TSMC Arizona

Electronics – Adafruit Daily — SMT Tip – Stop moving around!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !


3 Comments

  1. One thing you might like to consider is airspeed. That combined with a GPS can tell you your head or tailwind.

    It’s just a pressure measurement of a tube facing forward.

    http://www.eaa1000.av.org/technicl/instcal/instcal.htm

    Might give some hints

  2. I’m a big bicyclist

    I’ve always wanted to make a good bike computer which showed more statistics (humidity, temp, avg speed, altitude etc..)

    Very cool!

  3. @Nick – Thanks! That is a great idea.

Sorry, the comment form is closed at this time.