RMP meter

Thread Starter

Dritech

Joined Sep 21, 2011
901
Hi all,

Is it possible to do an RPM meter without using a microcontroller? Do you know of any circuit that I can refer to?

Thanks in advance.
 

#12

Joined Nov 30, 2010
18,224
How do you think speedometers and tachometers were done before microprocessors were invented? Do you think we all just sat on a bench and guessed at how fast the locomotive was going? (Whippersnapper!)

Think: Frequency to voltage converter.
 

#12

Joined Nov 30, 2010
18,224
$%^& I'm too slow today. Better that I go back to fixing the lawn sprinklers. Got any circuits that operate a shovel?:D
 

crutschow

Joined Mar 14, 2008
34,283
You can do it digitally with a crystal clock and counters, or you can do it in analog with the suggestions of posts #2 or #5. This is presuming you have some sort of pickoff from the motor to give pulses that are proportional to the motor speed.
 
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