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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 04-14-05, 12:11 PM   #1
crazyjohnson
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persistence of vision (pov) wheels?

My friend, who knows I am into bikes, pointed me to some cool pov wheel sites that he had found.

[more info here]

Description from above page:

Quote:
Each stick is 9" long with 32 LEDs, a microcontroller and hall-effect sensor. As the wheel turn, each stick detects a magnet attached to the chainstay which allows it to calculate current speed and 'sweep out' an image. While biking, the image appears to be static, floating inside the wheel, 3 or more sticks are needed to create a persistant image at any reasonable speed.
He originally stumbled on the material in a friend of a friend's blog post which has a lot more information as well as instructions.

Anyone seen this before? Forget spoke cards, this seems to be the ultimate decoration .
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Old 04-14-05, 12:38 PM   #2
commuteORdie
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cool! try http://www.hokeyspokes.com/

they sell basicly the same wheel light system, but different designs.
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Old 04-14-05, 12:42 PM   #3
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lets not forget about this dude :
http://www.drewish.com/blogger/archi...d_pov_toy.html

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Old 04-15-05, 01:31 PM   #4
daveIT
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that bike ownz!!!
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Old 04-15-05, 02:21 PM   #5
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Quote:
Originally Posted by crazyjohnson
Anyone seen this before? Forget spoke cards, this seems to be the ultimate decoration .
But where can I buy one?...NOW????
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Old 04-15-05, 02:28 PM   #6
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I just saw the demo vid for ho-spokes.
Nevermind.

Enjoy
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Old 04-15-05, 03:06 PM   #7
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The only people now allowed to wear trucker hats are those who ride John Deere bicycles

I'm actually more intrested in that nixie clock, I want to build one now, but with out the mercury tilt switch!

Last edited by Serbaside; 04-15-05 at 03:16 PM.
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Old 04-15-05, 06:55 PM   #8
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It looks like the version turd linked to would be much smaller, lighter and less expensive for doing text messages. I wonder if three or four of those could be run off a generator hub?
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Old 04-15-05, 09:28 PM   #9
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Despite the coolness, I would be worried about the lights getting jacked. I guess only for special occasions .
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Old 04-16-05, 08:46 AM   #10
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Quote:
Originally Posted by lz4005
It looks like the version turd linked to would be much smaller, lighter and less expensive for doing text messages. I wonder if three or four of those could be run off a generator hub?
At the least, that would require wires. At the most it would require some sort of electrical contact system that allowed the wheel to rotate freely. Think of a trolley running on a circular track with the over head wires and contact.
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Old 04-16-05, 11:11 AM   #11
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Originally Posted by ofofhy
At the least, that would require wires. At the most it would require some sort of electrical contact system that allowed the wheel to rotate freely. Think of a trolley running on a circular track with the over head wires and contact.
I was thinking you could run the wires directly from the rotating part of the hub to the lights on the spokes, bypassing the normal wire-out-the-side feature of generator hubs. Front wheel only, of course. It'd be a self-contained special occasion wheel to throw on the bike for critical mass rides and such.

It'd probably be better to have the mass of a generator in the center rather than 6/9/12 AA batteries further out towards the rim. Not being a weight weenie, but putting it in the middle would minimize its effect on braking and acceleration, physics of rotational momentum and all.
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Old 04-16-05, 11:34 PM   #12
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i just redesigned the small POV toy and started selling kits for those who are not experienced in making PCBs.
i've redesigned the large POV toy to be double sided...but im having difficulties figuring out a good (waterproof?) way to attach them. i usually use lightweight rechargable cellphone batteries. never had any problems.
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