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Setting Up
Follow these steps to attach the Parallax Line Follower module to the BOE-Bot (see Figure 1):
1. Clear any program currently in the BASIC Stamp of your BOE-Bot. All pins should be made
inputs (Dirs = 0).
2. Disconnect the power source from your BOE-Bot.
3. With the Line Follower module sensors facing up, place a 4/40 screw into one of the mounting
holes.
4. Holding the screw in place with a finger, turn the module over. Place a nylon washer over the
screw, then thread a 1" hex stand-off onto the screw. Tighten finger-tight.
5. Repeat steps 3 and 4 for the second mounting hole.
6. Carefully place the BOE-Bot on a work surface with the bottom side up.
7. Place the Line Follower module onto the bottom of the BOE-Bot so that the mounting posts are
facing forward as the BOE-Bot faces. This will allow the module to rest on the BOE-Bot servo
motors and the mounting posts to mate with slots at the front of the BOE-Bot chassis.
8. Holding the Line Follower module in place with your hand, turn the BOE-Bot over. You should
see the Line Follower stand-offs through the mounting slots in the BOE-Bot chassis. Use the
other two 4/40 screws to secure the Line Follower Module to the BOE-Bot.
9. Holding the BOE-Bot in your hand, turn it over so the bottom side faces up. Hold the ribbon
cable in your other hand so that the connector sockets are facing away from you and that the red
stripe is on the left.
10. Carefully align the top ribbon connector with the header on the Line Follower module. Press the
connector onto the Line Follower header.
11. Make a 90 degree bend to the right in the ribbon cable by folding it under itself. This will allow
the ribbon cable to pass behind the BOE-Bot drive wheel.
12. Place the BOE-Bot on a work surface, top side up.
13. Insert the 2x10 dual-row male-male header into the BOE-Bot AppMod socket.
14. Make a 90 degree bend to the left in the ribbon cable by gently folding it under itself. Carefully
align the ribbon cable connector with the header in the AppMod socket. Press the ribbon
connector onto the header.
15. You may wish to secure the ribbon cable to the side of the robot with a piece of double-sided
foam tape.
16. Reconnect power to your BOE-Bot. The Line Follower module is now ready for testing.
Example code with programming explanations are shown on the following pages. Source code for each of
these projects is available for download from www.parallaxinc.com/linefollower.
Figure 1: The Mounted Line Follower Module
Parallax, Inc. • Parallax Line Follower (#29115) • 12/2001
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