27403 Parallax Inc, 27403 Datasheet - Page 122

• Manufacturer Part Number: 27403
• Description: GUIDE APP ROBOTCS W/SUMOBOT V1.0
• Manufacturer: Parallax Inc

Specifications of 27403

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SumoBot®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Figure 3-16 Sensors and Indicators Built on the Breadboard
Building and Testing the Side-Mounted IR Object Detector Circuits
Figure 3-17 shows schematics of the side mounted IR LED and IR receiver pairs that
comprise the left and right side object detectors. These detectors have the essentially the
same components as the ones connected to the X8/X9 headers. A 470 Ω resistor has
been added to the IR receiver outputs to prevent problems that can occur if you
accidentally try to send a signal to P0 or P1. P0 and P1 should always be inputs,
receiving signals from the IR receiver output pins.
Parts Required
(2) IR LEDs
(2) IR LED standoffs
(2) IR LED light shields
(2) IR detectors
(2) Resistors - 470 Ω (yellow-violet-brown)
(2) Resistors - 220 Ω (red-red-brown)
(7) Jumper wires
IR Object Detector
√
(Left Side)
Build the circuit shown in Figure 3-17 with the help of the wiring diagram in
Figure 3-18.
IR Object Detector
(Right Side)