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Principles of Linearizing the Thermistor.

Thermistor Resistance vs. Deg F.

Tonight we are going to take our first steps toward making that scary looking exponential curve of the thermistor resistance into something we can use. The plot show in the first picture is the one we created in “Our First Look at Thermistor details” and was created by simply

Continue reading Principles of Linearizing the Thermistor.

Exponentials and Logarithms

Time constant vs. time.

In the last post, Our First Look at Thermistor details, I talked a little about the exponential increase in resistance as the thermistor was exposed to cold temperatures. Since then I realized we have not talked in detail what an exponential means. Also there is more than one base number

Continue reading Exponentials and Logarithms

Our First Look at Thermistor details.

Thermistor Resistance vs. Deg F.

Today we are going to take our first look at a real thermistor and start looking at the problems we will have trying to work with it. The thermistor I have chosen to work with is a 10KΩ at 25 deg C (room temperature) thermistor. It is a reasonable

Continue reading Our First Look at Thermistor details.

Linear scaling with offset.

A line represented with one of the standard formulas

The thermistor circuit we will be working with will require us to do a lot of scaling and manipulation. We will have to try to make a curvy thing becomes as straight as possible. As I thought about that, I realized I never really talked

Continue reading Linear scaling with offset.

Temperature Sensors for data recording.

Because this site is called Create And Make the goal is to work to projects that give us the excuse to learn some new things. The excuse to learn about Op-Amps was to develop a temperature measuring device. We are still going down that path. Today is a general sort of post where I don’t

Continue reading Temperature Sensors for data recording.