27404 Parallax Inc, 27404 Datasheet - Page 145

• Manufacturer Part Number: 27404
• Description: COMPETITION RING FOR SUMOBOT
• Manufacturer: Parallax Inc

Specifications of 27404

• Accessory Type: Hobby and Education
• 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

Exercises
11. What factors should you keep in mind when selecting a frequency for a given
12. What label designates the header with the front-left QTI sensor?
13. What connections does the SumoBot board make to the header with the front-left
14. How does the BASIC Stamp turn the power to a QTI on and off?
15. How many components are on the QTI sensor?
16. What water analogy was used for the infrared transistor inside the QRD1114?
17. Does the QRD1114 need a 38.5 kHz infrared signal?
18. Regarding Figure 3-11 on page 99, why does V
19. Regarding Figure 3-11 on page 99, what does each of the three downward curves
20. How does voltage decay relate to the amount of infrared a surface reflects? Use
21. What are the measurement units of
22. What code block can you use to improve the accuracy of the pulse-decay trick?
23. With the pulse-decay trick, are the QTIs active-high or active low?
24. How do the circuits from the side-mounted IR object detectors differ from the
25. How much more memory does it take to use a sensors variable to store all the
1. Write a routine that counts the number of IR interferences detected in a minute.
2. Write a routine that tests the IR receiver's frequency response at increments of
3. Calculate the value threshold will store in QtiSelfCalibrate.bs2 if the white
4. Expand the band of frequencies examined by TestFrequencyResponse.bs2 from
5. Modify TestFrontQtiLineSensors.bs2 so that it notifies you if tilt is detected.
6. Calculate the time it would take 3 QTIs to each take measurements that average
7. Modify the Your Turn program from Activity #7 so that it displays a 1 in
SumoBot ring?
QTI Sensor that you don't have to build on a breadboard?
infrared transistor receives more IR?
indicate?
black and white as examples.
2?
front-mounted ones?
individual sensor bits?
250 instead of 500.
measurement is 100 and the black measurement is 2000.
36 kHz ≤ f ≤ 42 kHz to 33 kHz ≤ f ≤ 45 kHz
RCTIME
sensors.BIT7
measurements of 2500.
if all IR detectors simultaneously detect an object.
RCTIME
and
0
PULSOUT
decay more quickly when the
in the BASIC Stamp