Contactless tachometer using pic microcontroller: Contactless digital tachometer project is designed to measure speed of dc motor using PIC18F46K Simple but accurate digital tachometer using microcontroller Has a resolution of 1 rev/sec. The tachometer use an optical pickup scheme for picking . Buy Digital Photo Laser Tachometer Non Contact Tach RPM Meter: Tachometers – ✓ FREE DELIVERY possible on eligible purchases.

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The photo transistor conducts more at this moment and as a result the voltage across R3 68K resistor shoots up at this moment. I found though that it would not work in the sunlight it apparently couldn’t see the reflection. Usually it is expressed in revolutions per minute or RPM.

Design of a Contactless tachometer | Open Access Journals

C remotes use Contactleas sensors to operate. The reflective tape stuck well to the cardboard and I was able to get my rpms cobtactless my carb set. Showing of reviews. After following the simple instructions and applying a small piece of reflective tape included to the spindle, I was able to quickly measure spindle speeds.

The logical place seemed to be on the sprocket cover, with the chain off, but the reflective tape wouldn’t stick at the required rpms because the metal cover was too smooth. The Microcontroller is programmed such that when the output of the counter attains a value above a fixed value in this paper the value is fixed at 29 rpsit sends a high signal to its MSB 7th pin of port C which is connected in series with an LED and a buzzer.


These days contactpess boards comes with atmega P-PU. When the speed of the motor again comes back to less than 29 rps, the LED and the buzzer tachometerr. Speed of a motor is one of the important factors to be considered while dealing with dc motors.

For the counting purpose both the timers of Timer0 and Timer1 are used.

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Technical Details

Included a case and probably ‘ of reflective tape that had a nice adhesive on it. I use an In system programmer ISP module for programming the The transistor 2N can handle only upto mA. Fulfillment by Amazon FBA is a service we offer sellers that lets them store their products in Amazon’s fulfillment centers, and we directly pack, ship, and provide customer service for these products.

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The IR rays emitted by the transmitter get reflected back after hitting the target. Also if the machine runs above the rated speed, it might damage or even burn off the machine.

For warranty information about this product, please click here. The screen is refreshed after each second. The tachometer checks the RPM by sensing that reflection when it goes by.


Contactless digital tachometer using 3 digit display and measures upto rev/sec

Interfacing LCD to Arduino. I hope this helpsit worksand beyond that–I have explained how and some of the issues I noticed.

I took it out of the package and the tachomeyer for the read-out fell out. The circuit diagram of the digital tachometer is shown below. I pointed at other non-spinning things and got a wide variety of RPMs. So we get the number of rotations per second of the motor shaft. Digital tachometer using A reflective strip is glued on the rotating object shaft, disc or fan in line with the sensor. Leave a Reply Cancel reply Your email address will not be published.

Don’t see what tachometee looking for? IR transceiver is used here for determining the number of rotations of the motor shaft per second. Amazon’s price was much less expensive than anything I could purchase locally. Tachometer is used to measure speed of motor or shaft or propeller. The readings were variable at first but seemed to settle down to agree with another tachometer I had.

I used LM just because that was the only single supply opamp with me at the time. You an use Keil to code, compile and test the program code.