122-28176 Parallax Inc, 122-28176 Datasheet - Page 100

• Manufacturer Part Number: 122-28176
• Description: GUIDE STUDENT PROCESS CONTROL
• Manufacturer: Parallax Inc

Specifications of 122-28176

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Propeller Education (PE) Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Based on the value that provides the best response, which resistor would you use for a
digital switch? Figure 4-6 shows the results of our test with the 100 kΩ value. Note as
the distance is reduced (X-axis), the voltage at R
point, there is insufficient angle for reflection and voltage rises once again.
Challenge 4-1: Determining Distances with Different Materials
Figure 4-6 Opto-Reflector Response with 100 kΩ RC
√
Using the 1 MΩ R
surface finishes. At what distance from the opto-reflective switch is a voltage of
1.5 V reached? Complete Table 4-1. Be sure to include the test reflector (white
paper) used in this activity as a reference.
C
value, test at least 5 surfaces, including different colors and
C
decreases (Y-Axis). But after a certain