WiSpy

1
Wi-Spy

• Building a network controlled
• RC Car
• Members
• Kevin Cross
• Russell Lewis

2
Objective

• Modify an RC Car to be controlled via a wireless
  network.
• Logitech webcam used for visual relay.
• Mounted EBox II will be used to control car,
  camera, and wireless conection.
• Create user friendly interface for controlling
  the car and camera.

3
Overview
Client
Router
M I C R O C O N T R O L E R
Car
Wireless Adapter
eBox II
4
Hardware

• Radio Shack RC Car Chassis and motors
• eBox II Runs WindowsCE
• Linksys Wireless Gaming Adapter WiFi connection
• Wireless Access Point
• PIC 16F676
• LM123 5V, 3A Voltage Regulator
• 2 TC4429 MOSFETs for servo motor
• 8.4V, 3000mAh NiMh battery

5
The Chassis
6
Windows CE Software

• Server App
• Read incoming packets
• Interpret commands and remap to the 6 bit control
  bit
• Send 6 bit control signal to the PIC over the
  Parallel port
• 3 speeds of forwards, 3 speeds of backwards,
  right, left, center, stop, and trim adjustments

• Client App
• Read Keyboard Commands
• If arrow keys adjust the speed and direction of
  the car
• If /- adjust trim to re-center the car
• Send commands to the Server App on port 1337

7
Client Software
8
Microcontroller

• Received a 6 bit control signal
• Sent a Pulse Width Modulated 5V signal to RC
  Cars H-Bridge for forwards/backwards movement
• Read the potentiometer encoded servo motor
• Adjust trim
• Control the servo motor for turning

9
Final Gantt Chart
10
Things we would of liked to do

• Write a custom Windows CE driver to allow webcam
  usage.
• Use a faster microcontroller for a better PWM
  signal, smoothing out movement.
• Relocated some of the weight for better balance.
• Allow access to the LAWN for long-range use.

11
Questions/Comments

• ?