28119 Parallax Inc, 28119 Datasheet - Page 104
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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The pulse train generated by pressing 5 on the remote control is shown in Figure 7-11.
You can see that the 10-bit wide data is transmitted LSB (least significant bit) first.
You should see the same data in your Debug Terminal (Figure 7-12). The program first
looks for the start pulse then counts the 10 pulses for each bit. The value of each bit is
listed.
From this we can demodulate the value of the data transmitted. The last four bits don’t
change so they are omitted. What we are left with is an 8-bit value of the demodulated
signal. You could use this to instruct the BASIC Stamp to do different tasks by the
remote control, or to send data between two BASIC Stamps.
Figure 7-12:
Decoding
keypress 5 on
a Sony
remote
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