Scratch Robotics Construction System
Build-It-Yourself develops content and
supporting platforms that inspire and guide kids
to use technology creatively.
www.build-it-yourself.com
Scratch Robotics Construction System
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
www.build-it-yourself.com
Scratch Robotics Construction System
Strategy
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.
www.build-it-yourself.com
= $279.99
Scratch Robotics Construction System
Solution Components
Sensors
Mechanical
sensors control
keyboard and
mouse.
Scratch
Sprites
Scratch program
controls screen light
based on mechanical
sensor, time and
sound.
Motor
Controller
Motion
Modules
Light sensitive
switch circuit
controls voltage to
motor based on
Scratch screen
light.
Catapults, fly
wheels, rotation
mechanisms
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Scratch Robotics Construction System
Solution Components
Sensors
Scratch
Sprites
Motor
Controller
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Motion
Modules
Scratch Robotics Construction System
Solution Components
Sensors
Scratch
Sprites
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Motor
Controller
Motion
Modules
Scratch Robotics Construction System
Solution Components
Sensors
Scratch
Sprites
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Motor
Controller
Motion
Modules
Scratch Robotics Construction System
Solution Components
Sensors
Scratch
Sprites
Motor
Controller
+6V to 9V
R1
Photo resistor
2K Ohms light (on)
50K Ohms dark (off)
5V to 9V DC Motor
1A
G
R2
10K
D
S
Photo Resistor:
When the light sensor sees black,
the motor is OFF.
When the light sensor sees white,
the motor is ON
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Motion
Modules
Scratch Robotics Construction System
Motor
Controller
Circuit
Board
Tools
Sensors
Scratch
Sprites
Motor
Controller
Motion
Modules
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
Radio Shack Tools
$ 9.00 – Test Jumpers
$ 3.00 – Screw driver
$ 7.00 – Wire Strippers
$ 20.00 – Multimeter
-------------------------$39.00 - Total
Radio Shack
Breadboard
MOSFET
On/Off Controller
Build-It-Yourself
Scratch Robotics Construction System
Sensors
Scratch
Sprites
www.build-it-yourself.com
Motor
Controller
Motion
Modules
Projects
Playful, engaging, computer controlled, multi-media rich.
Integration of the virtual and real worlds.
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Cuckoo Clocks
Door Greeters
Rock’n Robot Bands
Puppet Theater
Money Making Machines
Trivia Games
www.build-it-yourself.com
Sensors
Mechanical
sensors control
keyboard and
mouse.
Scratch
Sprites
Motor
Controller
Motion
Modules
Scratch program
controls screen light
based on mechanical
sensor state, time
and sound.
Light sensitive switch
circuit controls
voltage to motor
based on Scratch
screen light.
Catapults, fly
wheels, rotation
mechanisms