Build Your Own Combat Robot

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Handy Board BotBoard Chapter 12: Robot Brains 267 The Handy Board is a powerful veteran microcontroller board that has been around for a long time. First developed at MIT (Massachusetts Institute of Technology) by Fred Martin, this microcontroller board uses the popular 68HC11 microcontroller from Motorola. The programming environment is called Interactive C, which is similar to the traditional ANSI C. This microcontroller has four built-in motor controllers for directly driving four different very-low-current (< 1.0 amps) motors, and it has a built-in liquid crystal display (LCD) screen for displaying information. The BotBoard was developed by Kevin Ross and Marvin Green using the same 68HC11 microcontroller used by the Handy Board.The size of this board is significantly smaller, however, and it doesn’t have the built-in features of the Handy Board. Because many people didn’t want those extra features, this board offers a smaller and lower-cost solution to obtain the same level of power of the Handy Board. Karl Lunt has developed a version of the Basic programming language for the 68HC11 microcontrollers, which is called Sbasic. You can download it from Karl’s Web site at www.seanet.com/~karllunt/. Karl is also the author of an excellent book about robots called Build Your Own Robot (see Appendix B). Other Microcontrollers Many other microcontrollers are out there. The OOPic uses an object-oriented programming language. The BasicX-24 and Basic Micro’s Atom look almost like the Basic Stamp and are pin-for-pin compatible, but are faster, have more programming space, and uses a multitasking operating system. These microcontrollers are starting to gain a lot of popularity. A high-end microcontroller is the Robominds microcontroller, which uses the Motorola 68332, 32-bit microcontroller. It’s very fast and very powerful. Most of the microcontroller boards described here use either the Microchip PICs, the Atmel AVR chips, or the Motorola 68HC11 or 68HC12 chips as the core microcontroller. All of these microcontroller board companies have added some components to their boards to make their microcontrollers easy to use. When you get more experienced with microcontrollers, try experimenting directly with the PICs and the AVR chips. They are the microcontrollers found in most electronic appliances and systems.
268 Build Your Own Combat Robot Following is a short list of some of the most-popular microcontroller Web sites: ■ Basic Stamps www.parallaxinc.com ■ BrainStem www.acroname.com ■ BasicX www.basicx.com ■ OOPic www.oopic.com ■ Handy Board www.handyboard.com ■ BotBoard www.kevinro.com ■ PIC www.microchip.com ■ Basic Micro, Atom Chip www.basicmicro.com ■ 68HC11 and 68HC12 www.motorola.com ■ Robominds www.robominds.com ■ AVR www.atmel.com Microcontroller Applications The following discussion offers several examples of the various applications for which microcontrollers can be used. Although they are not directly associated with combat robots, these features can be adapted to building combat robots. All of these examples are based on the BrainStem microcontroller from Acroname. Keep in mind when reading the following examples that virtually any microcontroller can be used to accomplish these applications. The Robo-Goose The Robo-Goose is a robot that can be driven by a human operator via remote control. The operator drives the robot using a standard R/C-type transmitter (much like a combat robot). What is different here is that the receiver sends the control commands into a BrainStem microcontroller module that manipulates the input and translates it into meaningful output for the motors on the goose. One input determines the steering and the other the speed of the goose. The BrainStem is performing a servo mixing function. Figure 12-5 shows a photograph of the Robo-Goose.
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Build Your Own Combat Robot Pete Mi
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For more information about this boo
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Contents For more information about
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Current Ratings, 129 How It All Wor
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Object Detector, 290 Sensor Integra
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Acknowledgments We would like to th
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Introduction Some kids spend their
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About the Authors xv About the Auth
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2 ELCOME to the world of combat rob
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chapter Motor Selection and Perform
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Chapter 4: Motor Selection and Perf
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FIGURE 4-1 Typical motor performanc
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Determining the Motor Constants Cha
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FIGURE 4-2 Heat generated in an ele
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FIGURE 4-4 Motor power changes by d
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Chapter 4: Motor Selection and Perf
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FIGURE 4-7 24-volt, 185 rpm, 896 in
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the robot. If the engine is used to
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80 LECTRICALLY powered competition
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chapter Remotely Controlling Your R
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FIGURE 8-1 Wiring and rotational po
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FIGURE 8-2 Futaba’s top of-the-li
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Chapter 8: Remotely Controlling You
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FIGURE 8-4 Typical radio frequency
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FIGURE 8-5 Motor with three capacit
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Innovation First Isaac Robot Contro
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FIGURE 8-6 Block diagram of Isaac o
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chapter 9 Robot Material and Constr
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Metals Aluminum Chapter 9: Robot Ma
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Stainless Steel Chapter 9: Robot Ma
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Titanium used to solder small brass
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Chapter 9: Robot Material and Const
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Welding, Joining, and Fastening We
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place, or some liquid may have ente
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vibration and bounce around the ins
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204 ECAUSE robot combat has evolved
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design all the parts, and Dave did
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FIGURE 14-12 The 4-inch-tall alumin
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FIGURE 14-15 Internal view of Live
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330 The Future of Robot Combat The
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336 NLESS you’re building an exac
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356 OLLOWING are formulas that you
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sources of robot parts, 35 top ten
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INTERNATIONAL CONTACT INFORMATION A
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