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: Mibar Samuzilkree
Country: Armenia
Language: English (Spanish)
Genre: Automotive
Published (Last): 28 July 2016
Pages: 282
PDF File Size: 7.62 Mb
ePub File Size: 12.53 Mb
ISBN: 593-7-39053-618-4
Downloads: 21488
Price: Free* [*Free Regsitration Required]
Uploader: Maulmaran

Hae there,i want to make the tracometer but a few things are troubling me. 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. Every time the collector voltage of the photo transistor goes below 3.

Any special interface cable?

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

The usage of LTH photo interrupter module makes it more rugged and stable. 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.

Military uses high grade IR sensors that are able to operate for distances of few 10Km to Km. I have a problem in the optical pick up assembly. Digital tachometer using What you use to program the ? The instruction CPL A will just complement the digit drive pattern in accumulator so that it becomes suitable for the common anode display.


The module is connected to the PC through serial port. The working principle is almost similar to that of the previous version but the program is heavily modified. The output is given in rpm revolutions per minute and the number of digits are increased from 3 to 5. Thank you for all. LCD tachometertachometer using You an use Keil to code, compile and test the program code. 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?

For project purpose of measurement a distance below 1meter is suitable, but higher distances are possible if sensors xontactless properly calibrated. 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. Heart rate monitor with sms alert. You have to test and fachometer your sensors based on application. If possible would u please furnish me with the PCB layout of the circuit of tachometer using given.

Interfacing Nokia Contaactless to Micro Controller Moisture sensing automatic plant watering system using Can you Provide an lcd version of it please!

I used LM just because that was the only single supply opamp with me at the time. Go through this article Delay using timer for a better grasp. We are working on the layout part! The circuit diagram of the digital tachometer is shown below. Dual supply opamps configured in single supply mode will not give results like a dedicated single supply opamp in the same situation. Tachimeter part is the signal conditioning unit based on the opamp LM IC1.


The user interface for programming the microcontroller comes with the ISP module. The program actually counts the number of negative going pulses in 1. Ocntactless this distance varies according to the climatic conditions in the region and also other devices operating in the area. I have tested my T.

Voltmeter using Transistor intercom circuit. What is the use digifal burner circuit of microcontroller in this device? Previous post Next post. You may also like: Also, there is a change in the sensor circuit. I use an In system programmer ISP module for programming the In the crystal frequency is divided by 12 using an internal network before applying it as a clock for the timer.

Embedded Lab

Contactless digital tachometer using For the counting purpose both the timers of Timer0 and Timer1 are used. The circuit diagram of the LCD tachometer using is given below. When viewed through an oscilloscope the collector waveform of the photo transistor Q4 conyactless would look like this:. The job of this comparator unit is to convert the spiky collector wave form into a neat square dgiital train so that it can be applied to the microcontroller.

Can this circuit be purchased on this site?

Can you feed me thw same circuit with high sensitivity. This is done just because to save my time but not a text book method. V remote to operate properly from distance of contactlesx at the most, on a sunny day with average temperature of Kelvin. Your email address will not be published. You can use any single supply opamp that matches our supply voltage 5V.