Complete tutorial :-

How to make Arduino based digital Tachometer or RPM counter

This video is about how to make simple Arduino based Tachometer.
Watch full video for step by step tutorial to know how to make a Tachometer(RPM Meter)

Working principle:-
IR Sensor get penetrate by motion of motor shaft, signal are transfer from IR Senor module to Arduino.
This signal are processed in Arduino according to code loaded on it.Then Arduino transfer signals to LCD Screen to display RPM

Circuit drawing :- https://goo.gl/UePHiN
Arduino code download link :- http://www.mediafire.com/file/qb57bnuww0us465/tachometer-using-arduino.ino

Detail instructions at : –
http://electricdiylab.com/how-to-make-arduino-based-digital-tachometer-simple-diy-tutorial/

IR Sensor Arduino
VCC—————-5V
GND—————-GND
OUT—————–2(digital pin no. 2)

16X2 LCD Arduino
VSS—————— GND
VCC—————– +5V
VEE—————— POT
RS——————– 12
R/W—————– GND
E——————— 11
DB0—————-
DB1—————-
DB2—————-
DB3—————-
DB4—————— 6
DB5—————— 5
DB6—————— 4
DB7—————- 3
LED+————— +5V
LED—————– GND

Material required

1) IR Sensor module :- http://amzn.to/2mOUVyw
2) LCD Screen :- http://amzn.to/2lxF1bp
3) Arduino Nano :- http://amzn.to/2mcLXIg
4) Zero PCB :- http://amzn.to/2lxw4Ps
5) Header pins :- http://amzn.to/2lxtoRS
6) 9V Battery

Thanks for Watching
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48 Comments

  1. Can someone explain this : rpm=(rev/time)*60.000 ? Why 60.000 . On other sites/videos I;ve seen 30.000 or even 20.000 . Does it have to do with how many white bars are on the circle ( how many times the interrupt functions does ++ in 360 degree turn ) ? Because im using a low voltage to power my motor and it shows +5000 rpm, which is weird cuz its not spinnning that fast and im only using one white line .

  2. Is there an ardino board that can transfer the RPM info (and plus other data from possibly other sensors) to a smart phone..? For example via bluetooth

  3. When building boards , what are the acceptable power /voltage requirements for capacitors, resisters etc as far as wattage and tolerance

  4. Good video but I made this thing and my opinion is that this system is NOT very stable and gives fluctuating results. . The most of the sensors don’t work,so you must use the correct sensor and good refective material!

  5. Thanks it works great, but I have one problem over 32,000RPM it readings change to negative and counts down.

  6. I wanted to ask you why the code you provided doesn't work? I use Arduino Nano but with other sketches I had no problems. Is it necessary to add libraries for this project here? If so, how do you proceed? Thank you.

  7. You cant use this outside it ll detect the infrared from the sun unless and until you lower the sensitvity of the ir detector or you cover the the sensor receiver.

  8. in ur code rpm = rev/time*60000, what is 60000? please tell me, thanks

  9. Hello
    very interested in this account turn, I want to know if there is pcb for the electronic circuit or if there is way to download it.
    thank you for your answers cordially

  10. How the rpm is getting calculated.. I didnt understand the formula in your code plz explain

  11. I make the whole tachometer and upload the program.But LED not shows the name tachometer and rpm..Please suggest the solution

  12. Hi,
    I implement a tachometer Arduino (nano) with an Infrared sensor. I want to add a stopwatch program to the tachometer program. I want by pressing the button the time to start and by second pressing the time to stop and by third pressing the time is to reset. But since the tachometer program uses a "millis" function i cannot use the millis for the stopwatch. I need help for finishing the program.
    I upload the tachometer and the stopwatch programs.

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