and read the resulting voltage off of a voltage divider with an ADC. But that means using the voltage divider equation, and the difference in voltage between keys can get very small. Dropping the ...

First find the total resistance of the voltage divider. If the thermistor is moved to a freezer its resistance rises to \(40k\Omega\). The resistance of the resistor remains the same. We can ...

The two resistors may have fixed values or one may be an LDR, a thermistor or other input device. The supply voltage is divided in the ratio of the resistances in the voltage divider. For the ...