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124 CHAPTER 4 ■ SENSORS
Figure 4-11. The Lynxmotion Bumper Switch Assembly Kit
The second type is a single line detector, shown in Figure 4-12. You can use this sensor to
read white or black. It also has an adjustable potentiometer that lets you determine its sensitivity.
Figure 4-12. The Lynxmotion Single Line Detector
The third is the Sharp IR GP2D15 proximity sensor (see Figure 4-13). This is a great sensor,
and can detect whether something exists at a specified distance from your robot. You can adjust
this sensor to measure from 4 inches to about 24 inches to get an on-off reading.
