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 result will be a waveform like what shown below at the emitter of the photo transistor. Amazon’s Choice recommends highly rated, well-priced products available to ship immediately. Customers who viewed this item also viewed. In the crystal frequency is divided by 12 using an internal network before applying it as a clock for the timer.

So we get the number of rotations per second of the motor shaft. The interrupt counts the number of times the voltage variation occurs in the resistor in series with the receiver and sends the value to the LCD display every second.

LCD tachometertachometer using This value of voltage will depend upon the intensity of incident IR radiations or in other words, the distance between IR transmitter and receiver. It can measure time interval with better accuracy. AmazonGlobal Ship Orders Internationally. I used LM tachometfr because that was the only single supply opamp with me at the time.


With the advent of modern electronics, the tachometers have changed a lot. Digital tachometer using admin April 20, 39 Comments.

Please make sure that you are posting in the form of a question. Such a setup needs a variable potentiometer to be connected across the supply of the motor and thereby the speed of the motor can be varied to an extent. For this setup and every other setup based on principle of reflection of light the IR LED and the cntactless are placed side-by-side at a distance of mm from each other facing the obstruction which is generally less than 10cm away from the tip of IR LED.

Technical Details

You may also like: I pointed at other non-spinning things and got a wide variety of RPMs. I have a problem in the optical pick up assembly. Can you Provide an lcd version of it please! The solution I came up with was to make a template out of a black piece of cardboard and slide it over the sprocket a picture is attached.

Digital tachometer using arduino plus motor speed control. Circuit diagram and program

Your project is amazing and it works fine. Contactess the speed of the motor again comes back to less than 29 rps, the LED and the buzzer stopped. Interfacing Nokia Display to Micro Controller Moisture sensing automatic plant watering system using What other items do customers buy after viewing this item? The module is connected to the PC through serial port.

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A reflective strip is glued on the rotating object shaft, disc or fan in line with the sensor. These days arduino boards comes with atmega P-PU. Measures the rotational speed with a visible red light beam from a powerful LED. Keep this in mind while selecting the load. Next part is the signal conditioning unit based on the opamp LM IC1.

Design of a Contactless tachometer | Open Access Journals

Alexa Actionable Analytics for the Web. It looks to be made by a different company. There was a problem filtering reviews right now.

Resistor R2 limits the current through the IR diode. Image Unavailable Image not available for Color: Full program for the digital tachometer using arduino is shown below. V remote to operate properly from distance of 5m at the most, on a sunny day with average temperature of Kelvin.

However, for most situations, as long as the little reflective tape is the one and only thing–it works like a champ.

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