1. Build-It-Yourself develops content and supporting platforms that inspire and guide kids to use technology creatively. Scratch Robotics Construction System www.build-it-yourself.com

2. The problem: 1. Many construction kits are expensive. 2. Some construction kits are taken off the market. 3. Some construction kits are very complex. The mission: To design a robotic construction system that: 1. Is under $30 2. Uses common parts 3. Is easy to use Scratch Robotics Construction System

3. www.build-it-yourself.com LEGO™ and other robotics systems use expensive microprocessors to relay information to and from the computer. We use homemade mechanical mechanisms to control the keyboard and the mouse. To control the motors from Scratch, we use parts from Radio Shack that cost under $25 to detect brightness on a Scratch screen. Scratch Robotics Construction System Strategy = $279.99

4. www.build-it-yourself.com Scratch Robotics Construction System Solution Components Mechanical sensors control keyboard and mouse. Light sensitive switch circuit controls voltage to motor based on Scratch screen light. Scratch program controls screen light based on mechanical sensor, time and sound. Catapults, fly wheels, rotation mechanisms Motor Controller Motion Modules Scratch Sprites Sensors

5. www.build-it-yourself.com Scratch Robotics Construction System Solution Components Motor Controller Motion Modules Scratch Sprites Sensors

6. www.build-it-yourself.com Scratch Robotics Construction System Solution Components Motor Controller Motion Modules Scratch Sprites Sensors

7. www.build-it-yourself.com Scratch Robotics Construction System Solution Components Motor Controller Motion Modules Scratch Sprites Sensors

8. www.build-it-yourself.com Scratch Robotics Construction System +6V to 9V S DG 5V to 9V DC Motor 1A R1 Photo resistor 2K Ohms light (on) 50K Ohms dark (off) R2 10K Solution Components Photo Resistor: When the light sensor sees black, the motor is OFF. When the light sensor sees white, the motor is ON Motor Controller Motion Modules Scratch Sprites Sensors

9. Radio Shack Breadboard MOSFET On/Off Controller Build-It-Yourself Radio Shack Parts $ 8.00 - Breadboard $ 2.00 - MOSFET $ 3.00 - Photo Resistors $ 3.00 - Hookup Wire $ 1.50 - 10K Potentiometer $ 3.00 - 9V connector $ 2.50 - 9V battery -------------------------- $23.00 - Total Motor Controller Circuit Board Tools Radio Shack Tools $ 9.00 – Test Jumpers $ 3.00 – Screw driver $ 7.00 – Wire Strippers $ 20.00 – Multimeter -------------------------- $39.00 - Total Scratch Robotics Construction System Motor Controller Motion Modules Scratch Sprites Sensors

10. www.build-it-yourself.com Scratch Robotics Construction System Motor Controller Motion Modules Scratch Sprites Sensors

11. Playful, engaging, computer controlled, multi-media rich. Integration of the virtual and real worlds. Projects www.build-it-yourself.com  Cuckoo Clocks  Door Greeters  Rock’n Robot Bands  Puppet Theater  Money Making Machines  Trivia Games

12. Light sensitive switch circuit controls voltage to motor based on Scratch screen light. Motor Controller Catapults, fly wheels, rotation mechanisms Motion Modules Scratch program controls screen light based on mechanical sensor state, time and sound. Scratch Sprites Mechanical sensors control keyboard and mouse. Sensors