SEN-13582 Datasheet by SparkFun Electronics

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SparkFun Line Follower Array
SEN-13582 RoHS
Description: The SparkFun Line Follower Array is a long board consisting of eight IR sensors that
have been configured to read as digital bits! We have designed the SparkFun Line Follower Arrays
to follow a dark line of about ¾ inch width or smaller (spray paint or electrical tape) on a light
background. Each array features visible LEDs that point upward when the board is attached
(properly) so you can see what the robot sees, brightness control right on the board, and an I2C
interface for reading and power control. Here at SparkFun, the RedBot Shadow Chassis was used
as a test platform but really this was designed as an add-on for almost any bot.
The line follower functions by taking an 8-bit reading of reflectance for use with following lines or
reading dark/light patterns and can see from about ¼ to ¾ inches away. The IR brightness control
and indicator can be adjusted with the on-board potentiometer and is capable of showing you the
strength of the IR LEDs. Illumination can be turned on and off with software to conserve power, or
left on all the time for faster readings. The SparkFun Line Follower Array requires 5V of power with a
supply current range of 25-185mA with strobing disabled and 16-160mA with it enabled. Additionally
we have added six mounting holes to the line follower with the two inner holes designed to fit our
Shadow Chassis while the other four are general purpose.
Note: As you know our Sun emits quite a bit of infrared light, making the SparkFun Line Follower
Array much less effective in direct sunlight. Plan your projects accordingly!
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8 sensor eyes (QRE1113, like in our line sensor breakout)
I2C interface
Adjust IR brightness on the fly with a knob
Switch IR on and off with software
Switch visual indicators on and off with software
Invert dark/light sight with software
Based on the SX1509 I/O expander

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