28119 Parallax Inc, 28119 Datasheet - Page 95

• Manufacturer Part Number: 28119
• Description: KIT UNDERSTANDING SIGNALS
• Manufacturer: Parallax Inc

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

GOTO START
DETECTED:
If the IR signal makes it to the detector, the BASIC Stamp will report it to you in the
Debug Terminal. This method can be used to detect objects. If, for whatever reason, the
IR signal does not make it to the detector, the BASIC Stamp tells the Debug Terminal to
display:
Now when you place your hand in front of the IR LED, you will see this in the Debug
Terminal:
The IR signal is reflecting off your hand and back to the IR detector. Note that when this
message is visible in the Debug Terminal, the signals are moving in the Plot Area. When
you remove your hand, the signals freeze. This is because your hand is not there to
reflect the infrared light, so the Channel 2 signal is high and does not fall to the 2 V
trigger level.
IF IR_DETECT = 0 THEN DETECTED
DEBUG HOME, "IR DETECTOR OUTPUT IS HIGH, NOT DETECTED"
DEBUG HOME, "IR DETECTOR OUTPUT IS LOW,
GOTO START
IR DETECTOR OUTPUT IS HIGH, NOT DETECTED
IR DETECTOR OUTPUT IS LOW,
DETECTED
DETECTED"