Arduino Measurements in Science: Advanced Techniques and Data Projects by Richard J. Smythe

Author:Richard J. Smythe
Language: eng
Format: epub
ISBN: 9781484267813
Publisher: Apress

Position of Potentiometer

Active range

Min to Max

Fully CCW

2 to 2-½

54 to 64 mm

1 turn CW

2 to 2-

54 to 64 mm

2 turns CW

2 to 2¾

54 to 70 mm

3 turns CW

2¼ to 2¾

58 to 70 mm

4 turns CW

2½ to 3

58 to 64 mm

5 turns CW

2 to 3¼

67 to 82 mm

6 turns CW

2 to 3½

72 to 89 mm

7 turns CW

3 to 4

80 to 102 mm

8 turns CW

3 to 4½

85 to 114 mm

9 turns CW

5¼ to 8¾

133 to 214 mm

10 turns CW

7 to ∞

175 to ∞

Observations

When the Arduino sketch in Listing 6-3 runs, only two ADC values are observed. At the approximate minimum values tabulated in Table 6-4, the digital values streamed to the serial monitor switch between 1023 and 12 or 13. The IRDET-01 is acting like a digital sensor at the minimum proximity distance set by the distance potentiometer.

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