h a l f b a k e r yTrying to contain nuts.
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Two-axis actuators capable of moving very quickly and controlled by a small programmable integrated circuit hold a piece of chalk to the ground behind a bicycle. The assembly attaches as a cargo rack does, and includes a shock system to maintain chalk contact with the ground and a ledge-bar that lifts
the assembly up when the cyclist goes over a bump that could damage the system.
The computer reads the speed of the ground from a standard magnetic wheel-rotation counter, then decides how fast to move the chalk left, right, forward and backward to write letters in sequence. "Eat at cool joe's" ?
Relevant 'baking and info.
Advertishoes
Here is a similar idea for shoes, by none other than [UnaBubba]. A link on his idea, the tricycle one, shows a bike that writes messages with imprints from the tires. It seems your chalking outfit may be here to stay. [daseva, Nov 15 2008]
This one goes to eleven.
Graffiti_20Steet_20Cleaner
Could have also been titled 'Pimp my StreetCleaner'. [daseva, Nov 15 2008]
Dot-matrix version
http://www.bikesagainstbush.com/
Ignoring the politics, this is an implementation that uses spray chalk in a dot-matrix fashion to write messages. [Srimech, Nov 15 2008]
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That's very good. Presumably the message is typed in beforehand and the rider just hits a button at the appropriate moment. Dotting 'i's and crossing 't's would be fun |
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Very high tech, all these actuators and such. A unicyclist with some duct tape and a lot of practive could do just as well. Has this been brought up before? Apparently not? + |
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//a piece of chalk//
Unless you're just signing your initials, you need a crate full. As each is worn away, a new piece of chalk drops into place. And when you're down to the last one, it could write "please help, need chalk". |
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Perhaps a support bicycle could follow, feeding chalk in on a belt. |
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I like the fact that it writes instead of printing. |
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You'd probably need 2 or even 3 print heads. Have a look at some cursive writing. as you scan the print plane from left to right, there will often be two, or even three lines at a given location. <Think about it, as you write, there is some movement of the pen tip from right to left, in forming loops, etc.> |
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Solve this with multiple print heads, otherwise your chalk will need to be able to trave very quickly indeed. |
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There definitely needs to be a separate chalk that drops down just to dot i's. Or maybe a mini paintball gun. |
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It would be cool if you could hook it up to a program to design multi-layered/colored patterns as a visualizer linked up with an mp3 player that you would play through mounted speakers. |
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Watch your P's and Q's if you're going to cursive in public. |
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