In this chapter you will
Learn how to connect a resistive touchscreen to your Arduino
Discover the values that can be returned from the touchscreen
Create a simple on/off touch switch
Create an on/off touch switch with a dimmer-style control
We see touchscreens everywhere today: smartphones, tablets, and portable video-game systems. So why not use a touchscreen to accept input from a user?
Touchscreens can be quite expensive, but we’ll use an inexpensive model available from SparkFun (part numbers LCD-08977 and BOB-09170), originally designed for the Nintendo DS game console.
This touchscreen, which measures about 2 by 2 3/4 inches, is shown mounted on a breadboard in Figure 10-1.