28139 Parallax Inc, 28139 Datasheet - Page 188
28139
Manufacturer Part Number
28139
Description
KIT REMOTE IR FOR BOE-BOT W/TEXT
Manufacturer
Parallax Inc
Specifications of 28139
Accessory Type
IR Remote
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Boe-Bot®
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
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Figure B-1 IR Transmit and Receive Circuits
Developing the IR Communion Protocol
All it takes to transmit infrared with the BASIC Stamp 2 is an IR LED, a resistor, and the
FREQOUT
will transmit the 38 kHz signal in time increments of 1 ms. With this in mind,
won't work for the 2.4, 1.2, and 0.6 ms time increments required to transmit the SONY
TV protocol signals.
Since the protocol we are developing in this activity is for communication between
BASIC Stamp modules, the sensible solution is to chose pulse durations that last, 3, 2, or
1 ms and assign them as the start, binary-1 and binary-0 pulses. Also, since the BASIC
Stamp variable sizes are bit, nibble, byte and word, the number of data bits transmitted
command. The one hitch to the
See Appendix C if you want to emulate SONY remote functions with a BASIC Stamp.
Appendix C introduces a different circuit along with programming techniques you can use to
transmit 38 kHz IR signals that last fractions of milliseconds, including 2.4, 1.2, and 0.6 ms.
FREQOUT
command is that the BASIC Stamp
FREQOUT
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