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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Technical Details

A reflective strip is glued on the rotating object shaft, disc or fan in line with the sensor. Also, there is a change in the sensor circuit.

Amazon Advertising Find, attract, and conttactless customers. I’ve used better photo tachs in the past, and they read similarly, so this one seemed fine, and the ratios I measured all made sense. The transistor 2N can handle only upto mA. Another timer resets the counter after each second.

Design of a Contactless tachometer

The arduino interrupt is configured to be rising edge triggered. There was a problem completing your request. You can use any single supply opamp that matches our supply voltage 5V. Controlling the speed of motor.

Interfacing LCD to Arduino. For sending the light across tafhometer max distance is about 10m or more with a very high sensitivity photo detector and high intensity IR LED. Customers who viewed this item also viewed. Product information Technical Details. Transistor Q1 is used for driving the motor.


The circuit diagram of the digital tachometer is shown below. Tachometer using arduino praveen January 13, 10 Comments.

: Digital Photo Laser Tachometer Non Contact Tach RPM Meter: Automotive

The setup provides a LED and a buzzer to make warning or indication of some fixed rated speed of the motor. The result will be a square wave at pin 9 whose duty cycle is proportional to the value written using the analogWrite function. We are working on the layout part! My cintactless attempt to use it was on a weed eater–I was just curious and wanted to try it. Buy the selected items together This item: In real time applications an IR transceiver module can be used instead of the transmitter receiver pair.

Then this value is written to the PWM pin 9 using the anlogWrite function. Customers also shopped for. In wood and metal working it can be used to accurately measure the speed of a lathe or milling machine.

I returned this unit without any hassle as the laser dot was cut off at the upper side of the round laser dot by percent. Conactless usage of LTH photo interrupter module makes it more rugged and stable. Go through this article Delay using timer for a better grasp.


Amazon Inspire Digital Educational Resources. The screen is refreshed after each second. 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.

Receiver coverts this received radiations to a corresponding electric current. Super cheap, but great value! Showing of reviews.

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When the speed of the motor is above a fixed value, a buzzer is alarmed and an LED indication is given. East Dane Designer Men’s Fashion.

The tachometer checks the RPM by sensing that reflection when it goes by. The value is displayed on the LCD display. Tachometer is used to measure speed of motor or shaft or propeller. This device allowed me to place RPMs on my controls to know exactly how fast I am turning. Related article at PubmedScholar Google. Included a case and probably ‘ of reflective tape that had a nice adhesive on it.

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