27220 Parallax Inc, 27220 Datasheet - Page 129
27220
Manufacturer Part Number
27220
Description
BOOK STAMPWORKS
Manufacturer
Parallax Inc
Datasheet
1.27220.pdf
(230 pages)
Specifications of 27220
Accessory Type
Booklet
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
For Use With/related Products
StampWorks
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Not applicable / Not applicable
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EXPERIMENT #20: INFRARED OBJECT DETECTION
This experiment demonstrates an interesting side-effect of using FREQOUT without
the audio filter circuit of Experiment #18; the effect allows us to modulate an
Infrared (IR) LED for use with an IR detector.
Look It Up: PBASIC Elements to Know
Bit (variable type)
•
Building the Circuit
The StampWorks parts kit includes an IR LED (clear) and a 38.5 kHz detector. In
order to prevent “spill” from the LED, it should be placed in a protective shield as
shown in the diagram above.
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