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

It probably wouldn’t work. In real time applications an IR transceiver module can be used instead of the transmitter receiver pair. 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.

Resistor R2 limits the current through the IR diode. IR transceiver is used here for determining the number of rotations of the motor shaft per second.

This requires that you have some little reflective areathey provide you with a little reflective tape–and you put a small piece on the whatever. The optimum voltage at the wiper of R5 is between 0. Highly accurate, digital laser photo tachometer.

These days arduino boards comes with atmega P-PU. Top Reviews Most recent Top Reviews.


Design of a Contactless tachometer | Open Access Journals

Amazon Advertising Find, attract, and engage customers. See questions and answers. Next part is the signal conditioning unit based on the opamp LM IC1.

I have tested my T. Amazon Renewed Refurbished products with a warranty.

The readings were variable at first but seemed to settle down to agree with another tachometer I had. This device is built on a microcontroller – ATmega16, speed is detected using the IR transmitter and receiver pair, readings are displayed using a 16×2 LCD display and the speed limit is indicated by an LED and a buzzer.

I used frequently in the shop to check speed of equipment. Every time the collector voltage of the photo transistor goes below 3. The tachometer checks the RPM by sensing that reflection when it goes by.

Emitter of the photo transistor is connected to the Interrupt 0 digital pin 2 of the arduino. Timer 1 is configured as an 8 bit auto reload counter for registering the number of incoming zero going pulses and Timer0 is configured as a 16 bit timer which generate the necessary 1 second time span for the Timer1 to count.

Design of a Contactless tachometer

What is the use of burner circuit of microcontroller in this device? For the price, its a steal because lab grade or highly accurate tachometers are VERY expensive.


Usually it is expressed in revolutions per minute or RPM. Speed of a motor is one of the important factors to be considered while dealing with dc motors. You may also like: If possible would u please furnish me with the PCB layout of the circuit of tachometer using cintactless. When the speed of the motor became more than 29 rps, the LED glowed and the buzzer alarmed. Currently, item can be shipped only within the U. The transistor 2N can handle only upto mA. Earlier tachometers purely ccontactless where the revolution is transferred to the tachometer through mechanical coupling cable or shaftthe rpm is determined using a gear mechanism and it is displayed on a dial.

Keep this in mind while selecting the load. The setup provides a LED and a buzzer to make warning or indication of some fixed rated speed of conatctless motor. Dual supply opamps configured in single supply mode will not give results like a dedicated single supply opamp in the same situation.

Withoutabox Submit to Film Festivals. Tachometer using arduino praveen January 13, 10 Comments.