Patrick Prescott
Published © GPL3+

Badger POV Bike Wheel

Using a SparkFun Badger, this converts a standard bicycle wheel into a spinning display of patterns

IntermediateShowcase (no instructions)Over 2 days2,753
Badger POV Bike Wheel

Things used in this project

Hardware components

SparkFun Badger
×1
LED Portable work light
×1
5 mm LED: Green
5 mm LED: Green
×144
100 ohm bussed resistor
×18
Shift Register- Serial to Parallel
Texas Instruments Shift Register- Serial to Parallel
×9
General Purpose Transistor NPN
General Purpose Transistor NPN
×6
Resistor 47.5k ohm
Resistor 47.5k ohm
×1
Capacitor 1 µF
Capacitor 1 µF
the data sheet for the shift register recommends a ceramic capacitor
×9
Hall Effect Sensor
Hall Effect Sensor
×3
heat shrink tubing
×1
9V Battery Clip
9V Battery Clip
×1
RJ45 tip
These tips make a perfect spacer for the hall effect sensor. Anything with similar size and magnetic properties will do.
×3
Jumper wires (generic)
Jumper wires (generic)
F-F wires are the only necessary wires if yours are long enough. Mine, however, were too short, so I extended them with M-F wires also.
×1

Hand tools and fabrication machines

tweezers
An assortment is handy. This project called for some tight spaces.
variable temp soldering station
Small enough to insulate jumper wire connections
#2 phillips screw driver
#1 phillips screw driver
a mini screwdriver is best. This one will need to fit into some tight spaces in the flashlight
craft knife
coping saw
small wire cutters
small wire strippers

Story

Read more

Schematics

Reduced Schematic

This schematic shows the essential parts of one spoke. It contains only one shift register and a third of the LEDs.

Code

BadgerPOV.zip

Arduino
No preview (download only).

Badger POV

This code programmatically makes some patterns, reads sensors for a digital low via the analog inputs, and then sends the pattern bits to shift registers.

Credits

Patrick Prescott

Patrick Prescott

3 projects • 20 followers
I love all sorts of making. Electronics is probably my favorite, but carpentry is a close second.

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