O'Reilly logo

Arduino Essentials by Francis Perea

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

A computer connected dial thermometer

For this final example, I would like to build a device that displays the current temperature by using a dial and we will use two new components for it:

  • A thermistor or temperature-dependent resistor as a sensor
  • A servomotor as an output device to move the dial needle

Dealing with the thermistor is nothing new as it is just another kind of variable resistor and we will connect it to Arduino by once again creating a voltage divider. There is nothing new here.

Servomotors are a special kind of motors that don't freely spin, but are able to position at a specific angle and stay there instead thanks to a feedback mechanism and additional circuitry included in the motor case, and are depicted in the following image: ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required