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| Taken from MH Education |
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| Results |
Today, we did a lab that involved a thermistor. The focus of the lab was to use voltage division in order to increase the voltage by 0.5V by heating the thermistor from 25°C to about 37°C using the heat from our hand. We accomplished this task by adding a 12k resistor in series with the thermistor. The 12k resistor was actually measured to be 11.85k Ω. We were able to find the range of resistance that would work by using voltage division and setting it equal to 0.5 because we wanted the voltage to at least increase by 0.5V when measuring the voltage with a multimeter. We also found that the closer the resistor value is to the resistance values we got from our calculations, the better the voltage would increase by 0.5V.
Above a video of the voltage increasing by applying heat to the resistor. (NOTE: this is not the resistor used to increase the voltage by 0.5)
Summary:
Most of the day consisted of working on the lab and discussing nodal analysis. The lab involved using voltage division in order to increase the voltage at a specific amount using a thermistor that would decrease in resistance when heated. Nodal analysis is the method of determining the potential difference between nodes on a circuit. The main purpose of nodal analysis is to simplify the amount of equations needed in order to find current or voltage in a given electrical circuit that would otherwise be tedious using Kirchhoff's loop rule.
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