RPM sensor

Hello all,
I am new in Arduino and have a plan to get the RPM signal via inductive sensor (any sensor that does not have very much high accuracy. I prefer a cheep sensor rather expensive ones) and send it to PC. My intention is to have access to this RPM and sync it later with vibration signal.

I have checked some tutorial in youtube but I am looking for more advises if anyone has done it practically. As an example how much is the total cost approximately and how long does it take that a newbie user handle it.

Thanks in advanced,
Sm

What sort of speed range of RPM are you hoping to measure and to what level of accuracy?
You say using an inductive sensor but this might need something putting on the shaft that may unbalance it at high speed.
Google "arduino tachometer" to see possible ideas.

Riva:
What sort of speed range of RPM are you hoping to measure and to what level of accuracy?
You say using an inductive sensor but this might need something putting on the shaft that may unbalance it at high speed.
Google "arduino tachometer" to see possible ideas.

Hello Riva,
Thanks for the answer. I believe somewhere +-7 RPM is enough accuracy.
About unbalance most of the industrial machines such as generators, compressors, etc have targets on their shafts symmetrically to prevent unbalance.

Thanks
Regards,
Sm

We need to know what the physical layout of what you want to measure is. A shaft? A gear? A slot?

This makes a lot of difference to what we recommend.

Weedpharma