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* Update README.md
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#Thermistor
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# Thermistor
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This class makes it simple for an imp to read an NTC (“Negative Temperature Coefficient”) thermistor and determine the temperature. Thermistors are essentially temperature-dependent resistors. To use as a thermometer, a thermistor is used as half of a resistive divider, where the voltage across the full divider is known. The imp then reads the voltage at the center of the divider to determine the ratio of resistance of the thermistor and the bias resistor (also the nominal resistance of the thermistor), [from which the temperature can be derived](http://en.wikipedia.org/wiki/Thermistor).
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#Thermistor Examples
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# Thermistor Examples #
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Two example uses for the thermistor class are included:
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* Simple Thermistor Example: shows how to connect and read a thermistor at a set interval, posting the values to Xively to produce a graph.
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* Battery Thermistor Example: shows how to produce the same results as the simple example, but while running on a battery. This example includes a few hardware changes to use energy more conscientiously.
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* **Simple Thermistor** shows how to connect and read a thermistor at a set interval, posting the values to Xively to produce a graph.
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* **Battery Thermistor** shows how to produce the same results as the simple example, but while running on a battery. This example includes a few hardware changes to use energy more conscientiously.
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