Contents

Acknowledgments

Introduction

Evil Genius Project Descriptions and Ratings

1 Coil Gun

What You Will Need

Assembly

Test Firing

Theory

Summary

2 Trebuchet

What You Will Need

Assembly

Fire!

Tuning the Trebuchet

Theory

Summary

3 Ping-Pong Ball Minigun

What You Will Need

Assembly

Theory

Summary

4 Mini Laser Turret

What You Will Need

Assembly

Ideas

Theory

Summary

5 Balloon-Popping Laser Gun

Assembly

The Ray Gun

The Balloon Popper

Can Shooter

Theory

Summary

6 Touch-Activated Laser Sight

What You Will Need

Assembling the Sight

Testing and Calibration

Theory

Summary

7 Laser-Grid Intruder Alarm

What You Will Need

Assembly

Testing

Installation

Theory

Summary

8 Persistence-of-Vision Display

Arduino

Persistence-of-Vision Display

Motor Controller

Platform

Putting It All Together

Changing the Message

Theory

Summary

9 Covert Radio Bug

The Bug

Assembly

Using the Bug

A Bug Detector

Assembly

Theory

Summary

10 Laser Voice Transmitter

The Receiver

Assembly of the Receiver

The Laser Transmitter

Assembly of the Transmitter

Using the Project

Theory

Summary

11 Flash Bomb

What You Will Need

Assembly

Using the Project

Theory

Summary

12 High-Brightness LED Strobe

What You Will Need

Assembly

Theory

Summary

13 Levitation Machine

What You Will Need

Assembly

Theory

Summary

14 Light-Seeking Microbot

What You Will Need

Assembly (Robot)

Assembly (Charger)

Theory

Summary

15 Surveillance Robot

Assembly

Assembling the Motor Drivers

Assembling It All

Theory

Summary

Appendix: Electronics Construction Primer

Circuits

Components

Tools

Summary

Index