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Wheelastic - Image on Wheel LED mod

RGB LED strips display images on rotating bike wheel which can be controlled using a mobile app over wifi

thiagesh Dthiagesh D
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  • thiagesh Dthiagesh D

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completed project
SPARK PHOTON rgb led HALL EFFECT SENSOR Wheel

This project was created on 12/20/2015 and last updated 4 years ago.

Description

Image Simulation on wheel using Spark Photon and programmable RGB Led strips.
Speed of the wheel is found using magnetic sensors.
Fixed magnet is placed outside the wheel.
Two Hall Effect sensors are placed at the rims of the wheel, so that they can sense the magnet placed outside while the wheel is rotating.
Two programmable RGB Led strips are placed as shown in the image, and based on the sensor reading, and the time between the magnetic contact, the angle of the wheel is calculated.
With the angle of the wheel known, LED's are controlled accordingly to display the requested image or pattern.
An android app is written which invokes photon's cloud functions for turning on,off, switch images etc.
Images are transferred over TCP from the android app to the photon in the form of 50*50 pixel matrix.
This pixel matrix is used by the photon to turn on the LED's accordingly.

Components

  • 1 × particle photon
  • 1 × programmable RGB LED
  • 4 × AA Rechargeable battery
  • 2 × Hall effect sensor
  • 1 × Magnet

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  • Video of the project in action

    thiagesh D • 12/21/2015 at 16:50 • 0 comments

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cschrisstarke wrote 01/08/2016 at 20:58 • point

Fantastic project I've been wanting to do something similar for a while now,  will you be realising a schematic and code? Would be awesome to replicate this! 

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