Sparkfun Electronics RedBot Getting Started page 9

The Line Follower sensor is an add-on for your RedBot that gives your robot the ability to detect
lines or nearby objects. The sensor works by detecting reflected light coming from its own infrared
LED. By measuring the amount of reflected infrared light, it can detect transitions from light to dark
(lines) or even objects directly in front of it.
The sensor has a 3-pin header which connects directly to the RedBot Mainboard via female to
female jumper wires. Use the included RedBot library to detect lines or objects. A mounting hole
lets you easily connect one or more of these to the front or back of your robot chassis.
RedBot Accelerometer
The Accelerometer sensor is an add-on for your RedBot that provides bump and motion detection.
The sensor works by measuring acceleration forces on the x, y, and z axis. By measuring the
amount of acceleration (or lack there of) your robot can get a better understanding of its
movements.
The sensor has a 2x3 unpopulated footprint which connects directly to the RedBot Mainboard via a
female header. You can also solder the sensor directly to the headers on the Mainboard if you wish.
RedBot Whisker Bumper
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