You are previewing Make: Lego and Arduino Projects.

Make: Lego and Arduino Projects

Cover of Make: Lego and Arduino Projects by John Baichtal... Published by O'Reilly Media, Inc.
  1. Special Upgrade Offer
  2. A Note Regarding Supplemental Files
  3. Foreword
  4. Preface
    1. Assumptions This Book Makes
    2. Contents of This Book
    3. Conventions Used in This Book
      1. Lego CAD Conventions
    4. Using Code Examples
    5. Safari® Books Online
    6. How to Contact Us
    7. Acknowledgments for John
    8. Acknowledgments for Matthew
    9. Acknowledgments for Adam
  5. 1. Project: Drawbot
    1. Parts List
      1. Tools & Electronics
      2. Lego Elements
    2. Assembly Instructions
      1. Build the Lego Model
      2. Attach the Arduino and Bricktronics Shield
      3. Attach the Pen
    3. Program the Robot
      1. Processing and Arduino
      2. Setting Up the Programming Environment
      3. Don’t Forget Your Libraries!
      4. The Arduino Sketch
    4. The Next Chapter
  6. 2. Anatomy of Lego Robotics
    1. Mindstorms
      1. The NXT Brick
      2. Sensors
      3. Motors
      4. Wires
      5. Technic Beams, Mechanics & Connectors
    2. Expanding on the Mindstorms Set
      1. Buying More
      2. Add-On Electronics
      3. Third-Party Bricks
      4. Non-Mindstorms Lego Bricks
      5. Power Functions
    3. Programming Your Brick
    4. The Next Chapter
  7. 3. Arduino Interlude
    1. History of the Arduino Project
    2. What Is OSHW?
    3. Anatomy of the Uno
    4. The Arduino Ecosystem
      1. Uno Alternatives
      2. Older Models
      3. Shields
    5. Arduino Resources
      1. Books
      2. Websites
      3. Code
    6. The Next Chapter
  8. 4. Project: Clock
    1. Parts List
      1. Tools & Electronics
      2. Lego Elements
    2. Assembly Instructions
      1. Prepare the Gear
      2. Build the Lego Model
      3. Install the Arduino
    3. Program the Robot
    4. Setting the Clock
    5. The Next Chapter
  9. 5. Project: Chocolate Milk Maker
    1. Parts List
      1. Tools & Electronics
      2. Beverage Handling
      3. Food
      4. Lego Elements
    2. Assembly Instructions
      1. Build the Pump Assembly
      2. Build the Lego Model
      3. Attach the Syrup Bottle
      4. Build the Mixing Attachment
      5. Wire up and Install the Electronics
    3. Program the Robot
    4. The Next Chapter
  10. 6. Basic Electronic Theory
    1. Basic Concepts in Electricity
      1. Voltage, Current & Resistance
      2. Ohm’s Law
      3. Other Concepts
    2. Know Your Electronic Components
      1. Resistors
      2. Capacitors
      3. Diodes and LEDs
      4. Inductors
      5. Transistors
      6. Integrated Circuits
    3. Sensors 101
      1. Digital Sensors
      2. Analog Sensors
    4. Further Study
  11. 7. Gripperbot
    1. Parts List
      1. Electronics Parts
      2. Lego Elements
    2. Building Instructions
      1. Bracers
      2. Gripperbot
    3. Assembling the Gripperbot’s Electronics
    4. Programming the Gripperbot
    5. The Next Chapter
  12. 8. Project: Keytar
    1. Parts List
      1. Tools & Electronics
      2. Lego Elements
    2. Assembly Instructions
      1. Build the Lego Model
      2. Install the Electronics
    3. Program the Keytar
    4. Play Some Music!
    5. The Next Chapter
  13. 9. Project: Lamp
    1. Parts List
      1. Tools & Electronics
      2. Lego Elements
    2. Assembly Instructions
      1. Build the Lego Model
      2. Install the Electronics
      3. Download and Install the App
    3. Program the Lamp
    4. The Next Chapter
  14. 10. Advanced Techniques
    1. Wiring Up Bricktronics Equivalents
    2. Mounting PCBs to Legos
    3. Adding Molex Connectors to Lego Wires
    4. All About Motors
      1. DC Brushed Motors
      2. Stepper Motors
      3. Hobby Servo Motors
    5. Powering Your Robot
      1. DC Power Jack
      2. USB Connector
      3. Batteries
      4. Battery Dos and Don’ts
    6. NXT to Arduino Communication
    7. XBee Wireless Modules
    8. Epilogue
  15. Index
  16. About the Authors
  17. Colophon
  18. Special Upgrade Offer
  19. Copyright
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Chapter 5. Project: Chocolate Milk Maker

IN THIS CHAPTER

Parts List

Assembly Instructions

Program the Robot

The Next Chapter

Need a refreshing glass of chocolate milk? Just press a button
Figure 5-1. Need a refreshing glass of chocolate milk? Just press a button

For our next project we’re going to build a robot that makes a cup of chocolate milk by mixing together chocolate syrup and regular milk. It’s silly, of course—who needs such a thing? Still, it’s a great opportunity to expand our knowledge of Lego robotics and to introduce a couple of new tools. Plus, everyone loves a treat!

The way the robot works is that it pumps milk from its jug to a beverage cup using an aquarium pump, which pressurizes the jug and makes the milk to squirt out through an outlet tube, which conveniently dispenses into a glass. While the pump moves the milk, a second assembly squeezes a 6-oz. bottle of chocolate syrup while a stirring assembly mixes up the drink. All of this happens at the touch of the button.

This is the most complicated project in the book from a mechanical standpoint. Everything from the chocolate-squirting assembly to the stirring arm went through numerous iterations, and one thing we discovered was that it was easy to make “bad” chocolate milk, but making delicious chocolate milk means a lot of tweaking. Much of it is subjective. How dark do you like your chocolate? How important is it that the mix is stirred up thoroughly? These are the questions only ...

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