Adventures in Arduino

YOU’VE COME A long way, and now you’ve reached your final adventure—the biggest yet! In this adventure, you are going to combine digital input, digital output, analogue input and analogue output to create a marble maze game like the one in Figure 9-1. Inspired by retro pinball machines, your game knows when you’ve scored points and tells you if you’ve achieved a new high score. It counts down to when the next game begins and keeps track of the time remaining in the game. It even has its own sound effects!

Figure 9-1 A completed big adventure marble maze game

The game brings together a lot of the different skills you’ve learned from the earlier adventures, but there are a couple of other things for you to learn before you can build your game. The first is how to use a piezo as a sensor. You’ve already used a piezo as a speaker but it is a multitalented component and you can also use it to sense vibrations, which is a vital skill for your marble maze game!

What You Need

You need the following items for your marble maze game. The electronic components that you need are shown in Figure 9-2:

• A computer
• An Arduino Uno
• A USB cable
• A breadboard
• Some jumper wires
• 6 piezos
• 6 1MΩ resistor
• 1 red LED
• 1 yellow LED
• 1 green LED
• 3 220Ω resistors
• 1 panel mount push-to-make button
• 1 tactile ...