28139 Parallax Inc, 28139 Datasheet - Page 18

• 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

Your Turn – Testing the Remote on Other Devices
ACTIVITY #2: CHARACTERIZING THE IR MESSAGES
This activity focuses on measuring the pulses the Boe-Bot's IR detector sends when it
detects messages from the handheld remote. Figure 1-5 shows a timing diagram of the IR
detector's output at the beginning of an IR remote message. The IR detector sends a low
signal while it detects infrared flashing on/off at 38.5 kHz. While the IR detector does
not detect 38.5 kHz infrared, it sends a high signal.
interpreted by the BASIC Stamp module, the durations of these low signals have to be
measured and stored.
Infrared Detection Parts
All parts from the previous activity
(1) Infrared detector
(1) Resistor – 220 Ω (red-red-brown)
(2) Jumper wires
√
√
If you'd like to test it out on your brand of TV/VCR, etc., try following the
instructions in the remote manual to see if you can get it to work.
Before moving on to the next activity: If you followed the instruction in the
previous checkmark, make sure to reprogram the remote to control a SONY TV!
Before the message can be
Figure 1-5
IR Detector
Output for IR
Remote
Message