QTI line follower appkit documentation v2.0

4. Attach a QTI sensor to the other end of each threaded standoff, using a 3/8-inch screw. The

sensors should be facing downwards, and the 3-pin headers on each sensor should be pointing

towards the back of the chassis.

5. If necessary, slightly loosen the 7/8-inch screws and adjust the position of the QTI sensors so

that they are closely positioned edge to edge.

6. Tighten all connections securely.

Building the Sensing Circuits

Each QTI B pin is tied to Vss (ground) and each W pin is connected to Vdd (5 V). R pin connects to a

BASIC Stamp I/O pin:

 Far right to P4

 Mid right to P5

 Mid left to P6

 Mid right to P7

√ Use the schematic and the wiring diagram below to build the circuits for the three-pin headers.

Although there are many ways this circuit can be built, the setup shown below is useful because

it's thrifty with breadboard real-estate. Also, if you are using a HomeWork Board with your Boe-

Bot, it won’t interfere with the servo connections.