28119 Parallax Inc, 28119 Datasheet - Page 96

• 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

If you move your hand up and down in front of the emitter and receiver, you may see a
rapidly varying signal like the one shown in Figure 7-7. This happens when only a
portion of the 38.5 kHz signal is being reflected off your hand.
Figure 7-7:
Hand waving
causing
sporadic
detection by the
receiver