Thermistor

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Transistor... Thermistor...

These are found in various places such as:

  • Input current limiting (beginning of switching power supplies)
  • Temperature Sensors (3d printer beds, lithium batteries)
  • Temperature cutoffs (coffee maker)


Tips/Techniques

Checking an Input Current Limiter is Working

Use hot air, and the resistance should increase. This alternatively is a way to detect if what you are looking at is a thermistor. For: Identify this chip.