Simple but accurate digital tachometer using microcontroller Has a resolution of 1 rev/sec. The tachometer use an optical pickup scheme for picking . Today, we are going to make a digital tachometer based on a PIC This tachometer can measure speeds up to RPM with the resolution . Sir, I want the code for the Contactless Digital Tachometer using PIC16FA. Abstract: This paper proposes a hardware design of an. “Digital Contact-less Tachometer” based on IR sensor for measuring the Revolutions Per Minute (RPM ).

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The output is given in rpm revolutions contactlsss minute and the number of digits are increased from 3 to 5. Thank you for all. Go through this article Delay using timer for a better grasp. You may also like: Military uses high grade IR sensors that are able to operate for distances of few 10Km to Km.

How to make a contact-less digital tachometer using IR-light reflection technique – Embedded Lab

The program actually counts the number of negative going pulses in 1. Hae there,i want to make the tracometer but a few things are troubling me. Previous post Next post. The instruction Diigtal A will just complement the digit drive pattern in accumulator so that it becomes suitable for the common anode display.


Digital tachometer using admin April 20, 39 Comments. Can this circuit be purchased on this site?

Embedded Lab

In the crystal frequency is divided by 12 using an internal network before applying it as a clock for the timer. We digitaal working on the layout part!

I have tested my T. Also, there is a change in the sensor circuit. I use an In system programmer ISP module for programming the I have a problem in the optical pick up assembly.

Dear Sir, Kindly provide C code for better understanding. Leave a Reply Cancel reply Your email address will not be published. The module is connected to the PC through serial port.

Dual supply opamps configured in single supply mode will not give results like a dedicated single supply opamp in the same situation. Heart rate monitor with sms alert. For project purpose contaxtless measurement a distance below 1meter tavhometer suitable, but higher distances are possible if sensors are properly calibrated.

What you use to program the hachometer I want to ask whether the mechanism in this project counts the pulses for 60 seconds and then display it if so then how to configure to delay time for 60 sec and at the same time count the pulses in that duration?

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

Tachomdter circuit diagram of the digital tachometer is shown below. From the above two graphs you can see that the negative going edge of the waveform indicates the passage of the reflective patch across the sensor and that means one revolution.


The user interface for programming the microcontroller comes with the ISP module.

Your email address will not be published. This is for my study and teaching the program how to srite Thanks a lot for the Originators.

Timer 1 is configured as an 8 bit auto reload counter for registering the number of incoming zero going pulses and Timer0 digita configured as a 16 bit timer which generate the necessary 1 second time span for the Timer1 to count.

Only one opamp inside the quad LM is used here and it is wired as a comparator with reference voltage set at 3. Can you feed me thw same circuit with high sensitivity. digitap

Every time the collector voltage of the photo transistor goes below 3. Next part is the signal conditioning unit based on the opamp LM IC1.

The job of this comparator unit is to convert the spiky collector wave form into a neat square pulse train so that it digltal be applied to the microcontroller. Digital tachometer using