Any circuit or module to detect fan speed identification to micro controller??

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wounder
Posts: 1
Joined: Mon Feb 25, 2019 5:29 pm

Any circuit or module to detect fan speed identification to micro controller??

Post by wounder » Mon Feb 25, 2019 5:33 pm

Dear connection

I have a circuit for monitoring fan regulator speed change using ADC (as shown).
here iam using current sensor module for speed change identification..
but the problem is

-current sensor output ranges between small voltage so measurement take so difficult
-even in case input supply voltage (230v ) varies its effect the output of current sensor ..
so it hard to detect the speed changes .

could you please suggest some circuits or module to detect the fan speed changes , it should be identified by the micro controller

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