Laser-guided Ghost Climber

Step 3 Parts and materials

I used the following materials to construct my laser-guided ghost climber:

• Arduino Duemilanove board (ATmega328P)
• USB cable
• Two Class 2 laser pointers
• Two 6V servomotors
• Two 10 kilohm linear rotary potentiometers (i.e. not a logarithmic rotary potentiometer*)
• Two 10 kilohm resistors
• Four 150 ohm resistors
• Three LEDs (red, green and yellow)
• Three pushbuttons
• Piezo buzzer from Arduino kit
• Four AAA batteries
• Battery holder for four AAA batteries
• 9V battery
• 9V battery adapter for Arduino (optional - see here for details on how to make one)
• One double pole, single throw switch
• Plenty of insulated wire
• A few hundred 10mm staples (see Step 6)
• Assorted scrap wood
• Five wooden tongue depressors
• Three old CDs
• Solder
• Wood glue
• Superglue
• Electrical insulation tape
• Plasticine

These tools came in useful:

• Soldering iron
• Jigsaw
• Orbital sander or sandpaper
• Craft knife

I'm sure that you can change some of the items on this list to suit your own needs.

*I will refer to these components as potentiometers throughout this Instructable because that is how they are usually listed in catalogues of components. In actual fact, I will be using these as rheostats rather than potentiometers.