User Manual

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Lesson 24 Tracking Sensor
Introduction
A tracking sensor (as shown below) has the same principle with an obstacle avoidance
sensor but has small transmitting power.
Components
- 1 * SunFounder Uno board
- 1 * USB data cable
- 1 * Tracking sensor module
- Several jumper wires
Experimental Principle
When the infrared transmitter emits rays to a piece of paper, if the rays shine on a white
surface, they will be reflected and received by the receiver, and pin S will output low level;
If the rays encounter black lines, they will be absorbed, thus the receiver gets nothing, and
pin S will output high level.
In this experiment, we will use an obstacle avoidance sensor module and an LED attached
to pin 13 of the SunFounder Uno board to build a simple circuit to make a tracking light.
Since an LED has been attached to pin 13, connect the pin out to D8 of the SunFounder Uno
board. When the tracking sensor detects reflection signals (white), the LED will be on.
Otherwise, it will be off (black line).
Experimental Procedures
Step 1: Build the circuit
Tracking Sensor Module SunFounder Uno
S -------------------------------------------- D8
- ------------------------------------------- GND
+ ------------------------------------------- 5V
SunFounder