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Automating Manufacturing Systems - Process Control and ...

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continuous sensors - 23.43<br />

2. A high precision potentiometer has an accuracy of +/- 0.1% <strong>and</strong> can rotate 300degrees <strong>and</strong> is<br />

used as a voltage divider with a of 0V <strong>and</strong> 5V. The output voltage is being read by an A/D converter<br />

with a 0V to 10V input range. How many bits does the A/D converter need to accommodate<br />

the accuracy of the potentiometer?<br />

3. The table of position <strong>and</strong> voltage values below were measured for an inexpensive potentiometer.<br />

Write a C subroutine that will accept a voltage value <strong>and</strong> interpolate the position value.<br />

theta (deg)<br />

V<br />

0<br />

67<br />

145<br />

195<br />

213<br />

296<br />

315<br />

0.1<br />

0.6<br />

1.6<br />

2.4<br />

3.4<br />

4.2<br />

5.0

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