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 ).

Author: Melar Mugar
Country: Pakistan
Language: English (Spanish)
Genre: Finance
Published (Last): 23 November 2017
Pages: 431
PDF File Size: 11.21 Mb
ePub File Size: 2.56 Mb
ISBN: 756-9-67122-475-6
Downloads: 77572
Price: Free* [*Free Regsitration Required]
Uploader: Mibar

Dual supply opamps configured in single supply mode will not give results like a dedicated single supply opamp in the same situation.

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

Thank you for all. Your email address will not be published. Can this circuit be purchased on this site? I have tested my T. For sending the light across directly max distance is about 10m or more with a very high sensitivity photo detector and high intensity IR LED.

The output is given in rpm revolutions per minute and the number of digits are increased from 3 to 5.

You may also like: The module is connected to the PC through serial port. Contactless digital tachometer using Only one opamp inside the quad LM is used here and it is wired as a comparator with reference voltage set at 3.


I use an In system programmer ISP module for programming the I have a problem in the optical pick up assembly. Any special interface cable? We are working on the layout part! Heart rate monitor with sms alert. If possible would u please furnish me with the PCB layout of the circuit of tachometer using given.

In the crystal frequency is divided by 12 using an internal network before applying it as a clock for the timer. For the counting purpose both the timers of Timer0 and Timer1 are used. The circuit diagram of the digital tachometer is congactless below.

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

LCD tachometertachometer using C remotes use IR sensors to operate. V remote to operate properly from distance of 5m at the most, on a sunny day with average temperature of Kelvin.

The usage of LTH photo interrupter module makes it more rugged and stable. Go through this dugital Delay using timer for a better grasp. Will be updated on this page. Military uses high grade IR sensors that are able to operate for distances of few 10Km to Km. Hae there,i want to make the tracometer but a few things are dihital me.

You can use any single supply opamp that matches our supply voltage 5V. Dear Sir, Kindly provide C code for better understanding.

Previous post Next post. This is for my study and teaching the txchometer how to srite Thanks a lot for the Originators. Digital tachometer using admin April 20, 39 Comments.

Embedded Lab

I used LM just because that was the only single supply opamp with me at the time. Next part is the signal conditioning unit based on the opamp LM IC1.


Can you Provide an lcd version of it please! For this setup and every other setup based on principle of reflection of light the IR LED and the photo-sensor 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. Leave a Reply Cancel reply Your email address will not be published. You have to test and calibrate your sensors based on application.

The working principle is almost similar to that of the previous version but the program is heavily modified. When viewed through an oscilloscope the collector waveform of the photo transistor Q4 2N would look like this:.

Can you feed me thw same circuit with tachomteer sensitivity. 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. For project purpose of measurement a distance below 1meter is suitable, but higher distances are possible if sensors are properly calibrated.