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worldmags Build a Secret-Knock Gumball Machine 25 page 92 » ARDUINO REVOLUTION 41 Helicopter Rocket Automatic Yogurt Maker Retro R t Skype Sk Phone Ph Trippy Night Light PLUS: Sous Vide Cooker DIY Beehive Code 72: Real-Life MacGyvers 82 Smart Gumball Machine 92 CAN $17.99 Sous Vide Cooker US $14.99 HELICOPTER ROCKET 3 Hours, Start to Launch! ISBN: 978-1-449-39398-4 104 y(7IB4E9*NTNTSO( +,!=![!;!; Make This makezine.com worldmags Your innovations, together with digikey.com... imagine the possibilities. 510,000+ PRODUCTS IN STOCK 440+ SUPPLIER PARTNERS 60,000+ NEW PRODUCTS ADDED IN THE LAST 90 DAYS Digi-Key is an authorized distributor for all supplier partners. New products added daily. © 2011 Digi-Key Corporation, 701 Brooks Ave. South, Thief River Falls, MN 56701, USA worldmags worldmags worldmags 1.800.344.4539 digikey.com worldmags Volume 25 82 42: Getting Started with Microcontrollers Choose the right controller for your project and your skill level. By Tom Igoe 46: Vintage VoIP Convert a classic 1930s telephone into a Skype phone. By Andrew Lewis 52: Drag-n-Drop Arduino Programming Modkit makes microcontrollers easy for kids and anyone else. By Ed Baafi 57: Yobot: Precision Fermentation Build your own smart yogurt maker. By Chris Reilly ON THE COVER: MAKE Production Designer Gerry Arrington and his son, Ethan, enjoy a day outdoors with our amazing $5 Heli-Rocket. Learn how to make one of your own on page 82. Photographed by Garry McLeod. 62: Primer: Make and Use an Arduino Build and program a microcontroller clone with no soldering. By Dale Wheat Columns 71: Get in the Game 10: Welcome: The Little Engine That Could Make all kinds of game controllers using an accelerometer or other sensors. By Tom Igoe Largely ignored by the “big boys,” Arduino users are saying, “I think I can.” By Dale Dougherty 74: Micromania 11: In the Maker Shed: The MakerShield Everything Arduino: resources, kits and parts, cool projects and people. The ultimate open source prototyping shield for microcontrollers. By Dan Woods 12: Reader Input 57 Jailbreak catch-22, kids love robots, ladder logic, and space zillionaires. 13: Making Trouble Master the art of productive procrastination. By Saul Griffith 15: Maker’s Calendar Events from around the world. By William Gurstelle 16: Make Free: Untouched by Human Hands Here comes fake authenticity. By Cory Doctorow 26: Country Scientist Capturing and studying airborne dust, smoke, and spores. By Forrest M. Mims III 29: Tales from Make: Online The computer with 1,000 faces. By Gareth Branwyn YOBOT: Automated yogurt making using an Arduino. 2 worldmags Make: Volume 25 Vol. 25, Jan. 2011. MAKE (ISSN 1556-2336) is published quarterly by O’Reilly Media, Inc. in the months of January, April, July, and October. O’Reilly Media is located at 1005 Gravenstein Hwy. North, Sebastopol, CA 95472, (707) 827-7000. SUBSCRIPTIONS: Send all subscription requests to MAKE, P.O. Box 17046, North Hollywood, CA 91615-9588 or subscribe online at makezine.com/offer or via phone at (866) 289-8847 (U.S. and Canada); all other countries call (818) 487-2037. Subscriptions are available for $34.95 for 1 year (4 quarterly issues) in the United States; in Canada: $39.95 USD; all other countries: $49.95 USD. Periodicals Postage Paid at Sebastopol, CA, and at additional mailing offices. POSTMASTER: Send address changes to MAKE, P.O. Box 17046, North Hollywood, CA 91615-9588. Canada Post Publications Mai