Urgent Help Needed: DC Motor Speed (in RPM) Control Using Arduino

[aojos]

by the way, I use this formula in measuring the RPM. I do not use any sensor but I use the DC Gear Motor Encoder itself with 12V and 24 ppr with arduino

With the provided schematic above, I am wondering is it correct or weird that the measurement of RPM is in thousand?

[johnerrington]

@aojos

I am unsure whether this issue stems from a problem in the accurate simulation on proteus, or the code logic or if there might be an issue with the pins or connections in my setup.

So are you using REAL hardware, or just simulating?

@aojos

I use the DC Gear Motor Encoder itself with 12V and 24 ppr with arduino

finally we are getting SOME useful information.

you are counting pulses in a 1 second ""timeInterval", using an interrupt.
So rps = pps /24 and rpm = 60 * pps /24

@aojos

is it correct or weird that the measurement of RPM is in thousand?

Well that depends how fast your motor is turning.

I'd put a serial print in calculateRPM() to show the values.