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02: Home Entertainment, Page 14.
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Subscribers—read this article now in your digital edition!Reports from the world of backyard technology, including a cockroach-controlled robot, high altitude glider, student-built cyclotron, Vee 9 solar vehicle, robotic CD burner, coffee mug ramjet, and more.
From the column Made on Earth
Errata
MAKE reader Todd Johnson wrote:
"I received Make Volume 02 today to my delight.
"I found a problem with the article "Smashing Success" on page 17 however. The article states that "squarewave AC runs through the electromagnet..." Actually, the current in a cyclotron magnet is tightly regulated DC. The accelerating potential is provided by an RF amplifier that puts an alternating electric field on an internal D-shaped electrode. Magnetic fields produce an acceleration perpendicular to the motion of a charged particle, and can therefore not be used to change the energy (or speed) of these particles. An electric field is necessary."
Thanks Todd!
Links
- Insect Inside
Garnet Herz's cockroach-controlled robot. - 15-Mile-High Club
Art Vanden Berg's computer-controlled model glider has a good chance at pulling images from 89,000 feet. - Smashing Success
Thanks to Tim Koeth, building a cyclotron is now part of the curriculum at Rutgers University. - SunVee
Plans and parts lists are available online for building your own Vee 9 solar vehicle. - Batching It
Matthias Wandel's cd-burning robot. - AlternaJets
Larry Cottrill's coffee-mug ramjet. - Lego Type
Mark Simonson's description of the Lego mechanism he built to help digitize film fonts. - Eunicycle
A complete list of parts, the source code, and mechanical fabrication drawings of this one-wheeled motorized scooter are offered for free download. - Jukebox Hero
Patrick Webb's custom PC jukebox.
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