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Persistence of Vision for your Bike!
Index
Index
Index
Index
1 、 OverView …………………………………………………………………………………… 0 2
2 、 F.A.Q. ………………………………………………………………………………………… 0 3
3 、 Make it! ………………………………………………………………………………… 15
3.1
、
Prep …………………………………………………………………………………… 1 5
3.2
、
SpokePOV …………………………………………………………………………… 2 9
3.3
、
Parr. Dongle …………………………………………………………………… 3 0
3.4 、 Serial Dongle ………………………………………………………………… 3 6
3.5 、 USB Dongle ……………………………………………………………………… 43
4 、 Use it! …………………………………………………………………………………… 4 4
4.1 、 Customize ……………………………………………………………………… 44
4.2
、
Install …………………………………………………………………………… 5 8
5
、
Design ……………………………………………………………………………………… 7 1
6 、 Download …………………………………………………………………………………… 74
WARNING:ALL MATERIAL FROM THIS ARTICLE IS COLLECTED FROM SPOKEPOV,SPOKEPOV HAS
THE RIGHTS FOR FINAL INTERPRETA TION.
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1
1
1
1 、
、
、
、 OverView
OverView
OverView
OverView
Introduction
Introduction
Introduction
Introduction
Spoke POV is an easy-to-make electronic kit toy that turns your
bicycle wheel into a customiz ed display! The project includes a free
schematic design, open software for uploading and editing stored
bitmap images, and a high-quality kit with all the parts necessary to
build your own.
Kits & PCBs available for purchase now!
Specification & Features
• Can be used with road, mountain or BMX wheels!
• 30 LEDs on each side (22 for BMX) x 256 radial pixels
• Runs on 2-3 AA batteries for 10 hours or more, assuming 3000mAh alkalines
and 50% image coverage.
• Can run on rechargable NiMH AA's
• Comes with high-brightness red, yellow, green or blue LEDs
• Automatically shuts off after 3 minutes
• Software runs on any Mac, Windows or Linux computer with Serial, Parallal
or USB port
• Design is all through-hole parts, perfect for a first time kit builder.
• With one spoke, total persistence at 15mph. Two spokes, 10mph. Three spokes ,
7mph. (Assuming a mountain bike wheel). Looks cool even if not completely
persistant.
• Great for safe riding at night, provides excellent side visibility.
• Playa-tested!
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2
2
2
2 、
、
、
、 F.A.Q.
F.A.Q.
F.A.Q.
F.A.Q.
How
How
How
How does
does
does
does this
this
this
this thing
thing
thing
thing work?
work?
work?
work?
A SpokePOV is a 'stick' of LEDs with a magnetic (hall effect) sensor on the
outer end. When a magnet passes by, the microcontroller takes note. By counting
how long it takes between magnet passes, SpokePOV can tell how fast its rotating
and quickly blink the LEDS to present an image. Therefore, no matter how fast
you are riding, the image will show up correctly!
Why
Why
Why
Why is
is
is
is there
there
there
there a
a
a
a random
random
random
random LED
LED
LED
LED lit
lit
lit
lit on
on
on
on either
either
either
either side
side
side
side of
of
of
of the
the
the
the SpokePOV?
SpokePOV?
SpokePOV?
SpokePOV?
One LED is lit on both sides to indicate that the SpokePOV is on. The LED itself
may vary, as it is also used to debug the SpokePOV
What
What
What
What colors
colors
colors
colors are
are
are
are available?
available?
available?
available? Can
Can
Can
Can I
I
I
I put
put
put
put my
my
my
my own
own
own
own colors
colors
colors
colors in?
in?
in?
in?
Right now kits are available in red , yellow , green and blue . You can use your
own LEDs, just buy 60 5mm 2000mcd (or higher) LEDs and possibly vary the
resistor packs to fit your LEDs and number of batteries - this may take some
experimentation.
Why
Why
Why
Why don't
don't
don't
don't you
you
you
you have
have
have
have full
full
full
full color
color
color
color SpokePOVs?
SpokePOVs?
SpokePOVs?
SpokePOVs?
While full-color POV is really cool looking , its also fabulously expensive: to
make a 60-LED SpokePOV full color it would cost 5x as much!
Will
Will
Will
Will SpokePOV
SpokePOV
SpokePOV
SpokePOV fit
fit
fit
fit my
my
my
my wheel?
wheel?
wheel?
wheel?
SpokePOV can fit either BMX (20") wheels or mountain/roadoad bike (700c/37")
wheels. The short version is 6.5" (16.5cm) long, the longer version is 9" (23cm) .
If you are using BMX wheels, simply cut the PCB before soldering in parts and
then dont solder in the extra LEDs or latches.
How
How
How
How fast
fast
fast
fast do
do
do
do I
I
I
I have
have
have
have to
to
to
to pedal?
pedal?
pedal?
pedal?
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On a mountainbike wheel, I have found that with 1 SpokePOV you should bike
15mph/24kph. With 2 SpokePOV, bike 10mph/16kph. With 3 SpokePOVs, 7mph/11kph.
This will give a nice persistant image. The faster the better, of course.
Larger wheels you might have to bike a little faster. Smaller wheels, you can go
slower.
SpokePOV has been tested to work at 30mph (but can probably go even faster)
Can
Can
Can
Can I
I
I
I use
use
use
use SpokePOV
SpokePOV
SpokePOV
SpokePOV on
on
on
on a
a
a
a car
car
car
car or
or
or
or motorbike?
motorbike?
motorbike?
motorbike?
SpokePOV is not for motorbike or car use. It is specifically designed for
bicycles and bicycle speeds. You could easily hurt someone very badly if the
spokepov is badly attached to a motorcycle and then flies off at very high
speeds.
Do
Do
Do
Do you
you
you
you have
have
have
have pre-assembled
pre-assembled
pre-assembled
pre-assembled SpokePOVs?
SpokePOVs?
SpokePOVs?
SpokePOVs?
Sadly, no. I only sell kits: fun & easy to make and you'll learn a lot when you
build them! However, you can buy a similar product called 'Hokey Spokes' - same
idea but you can't customize the images
Do
Do
Do
Do you
you
you
you have
have
have
have any
any
any
any high-rez
high-rez
high-rez
high-rez photos?
photos?
photos?
photos?
Try:
• http://farm1.static.flickr.com/46/109571161_c9a4fb7189_o.jpg
• http://farm1.static.flickr.com/159/392464250_2836156f09_o.jpg
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3
3
3
3 、
、
、
、 Make
Make
Make
Make it!
it!
it!
it!
3.1
3.1
3.1
3.1 、
、
、
、 Prep
Prep
Prep
Prep
Tools
Tools
Tools
Tools
There are a few tools that are required for assembly. None of these tools are
included. If you don't have them, now would be a good time to borrow or purchase
them. They are very very handy whenever assembling/fixing/modifying electronic
devices! I provid e links to buy them, but of course, you should get them
whereever is most convenient/inexpensive. Many of these parts are available in a
place like Radio Shack or other (higher quality) DIY electronics stores.
Soldering
Soldering
Soldering
Soldering iron
iron
iron
iron . Personally, I like
the WES50 (now the WES51 ) and the
other ~$100 Wellers . One with
temperature control and a stand is
best. A conical or small
'screwdriver' tip is good, almost
all irons come with one of these. A
low quality (ahem, $15 radioshack)
iron may cause more problems than
its worth. YMMV.
Buy a WES51 from
All-spec
Solder
Solder
Solder
Solder . Rosin core, 60/40. Good
solder is a good thing. Bad solder
leads to bridging and cold solder
joints which can be tough to find.
Dont buy a tiny amount, you'll run
out when you least expect it. 1lb
spools are a minimum.
Buy 1lb spool
from All
Electronics
