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Fan RPM's — Parallax Forums

Fan RPM's

jblavenjblaven Posts: 36
edited 2007-10-30 19:18 in Propeller 1
Hey Guys,

I really like the uOLED-96-Prop, and was wondering if it is possible to monitor the RPM's of an 80mm fan, such as the ones found in a computer.

I am sure this is an easy question, but I tried a search with no luck.

Thanks,

Joe

Comments

  • deSilvadeSilva Posts: 2,967
    edited 2007-10-30 19:18
    It is generally an "open collector" signal, connect the tacho line with a 10k to Vdd. you will see a quite clean squarewave with either 2 or 4 times the RPM, depending on the fan
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