All about thermistors for measuring and controlling temperature, including how to use the thermistor that's in an automobile coolant temperature sensor. I talk about the difference between Positive Temperature Coefficient (PTC) thermistors and Negative Temperature Coefficient (NTC) thermistors. I talk briefly about my experiment to test if cold water boils faster than hot water and then talk about the effect of the thermistor's
changing resistance on the electrical current running through a PC fan, to turn the fan on and off. I go over the electrical circuit for it in detail, incuding the homemade power supply, thermistor, PC fan and wiring.

This video has correct English captions. Click on the CC button at the bottom of the video to see them.

To watch "Does Cold or Hot Water Boil Faster?", see here:
http://youtu.be/8Kak8EHAQyw

To watch how to power a compact fluorescent light using AA batteries, see "How to Make Joule Thief Light a CFL - Jeanna's Light":
http://youtu.be/FkLET8MhRbU

Toe watch "Make Solar Cell Transistor Powered Calculator using 2N3055", see here:
http://youtu.be/2bUc8RqSFXs

For more about my homemade power supply, see my webpage:
http://rimstar.org/equip/24v_pwr_supply.htm

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http://rimstar.org

A Darker Heart - music by audionautix.com