28119 Parallax Inc, 28119 Datasheet - Page 105
28119
Manufacturer Part Number
28119
Description
KIT UNDERSTANDING SIGNALS
Manufacturer
Parallax Inc
Datasheet
1.28119.pdf
(137 pages)
Specifications of 28119
Lead Free Status
Contains lead
Accessory Type
Oscilloscope
Interface Type
USB
For Use With/related Products
BASIC Stamp® 2 and Board of Education
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Summary
This chapter demonstrated several uses for IR, including common circuits and methods
used in robotics for object detection. The OPTAscope was triggered using an external
trigger connected to a BASIC Stamp I/O pin. This ensured the signal would be captured
at the proper time without relying on the receiver’s pin. The Autoscale feature was
introduced to automatically center the signal within the Plot Area. Additionally, the
chapter provided code and a visual demonstration of decoding handheld infrared remote
controls by demonstrating their waveforms.
Exercises
Further Investigation
“Infrared Emitting Diode & 40 kHz Infrared Detector” Stamp™ Weekend
Application Kit Parallax, Inc., 2001
"Experiments from Optical Engineering and Robotics for a Pre-Engineering
Program”, Dr. S.K. Ramesh, Dr. Michael Fujita and Mr. Andrew Lindsay, of CSU
Sacramento.
1. Describe how you could trigger the infrared object detection circuit without
2. When experimenting with handheld infrared remote controls, press subsequent
relying on the external trigger.
buttons and note how the signal changes. Describe the pattern of the binary
results.
This downloadable Application Note includes detailed examples of infrared
decoding and object detection. It is filed under Miscellaneous in the Accessory
Docs menu on the Downloads page at www.parallax.com.
This article was presented at the IEEE Frontiers in Education Conference
October 10-13, 2001 in Reno, Nevada. It provides examples of how these
concepts can be utilized in engineering instruction. It is available from the
Articles by Outside Authors menu on the Downloads page at www.parallax.com.
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