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: Daibei Akinonris
Country: Russian Federation
Language: English (Spanish)
Genre: Finance
Published (Last): 2 March 2016
Pages: 149
PDF File Size: 14.88 Mb
ePub File Size: 13.84 Mb
ISBN: 744-8-21570-993-3
Downloads: 14403
Price: Free* [*Free Regsitration Required]
Uploader: Mara

You can use any single supply opamp that matches our supply voltage 5V.

C remotes use IR sensors to operate. I have a problem in the optical pick up assembly. Can you Provide an lcd version of it please!

Digital tachometer using Go through this article Delay using timer for a better grasp. For sending the light across directly max distance is about 10m or more with a digifal high sensitivity photo detector and high intensity IR LED.

I use an In system programmer ISP module for programming the 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. Also, there is a change in the sensor circuit.

Can you feed me thw same circuit with high sensitivity. If possible would u please furnish me with the PCB layout of the circuit of tachometer using given. This is divital just because to save my time but not a text book method. The job of this comparator unit is to convert the spiky collector wave form into a neat square pulse train so that it can be applied to the microcontroller.


But this distance varies according to the climatic conditions in the region and also other devices operating in the coontactless. Hae there,i want to make the tracometer but a few things are troubling me.

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

What you use to contacltess the ? The user interface for programming the microcontroller comes with the ISP module. We are working on the layout part! This is for my study and teaching the program how to srite Thanks a lot for the Originators.

For the counting purpose both the timers of Timer0 and Timer1 are used. When viewed through an oscilloscope the collector waveform of the photo transistor Q4 2N would look like this:. The circuit diagram of the LCD tachometer using is given below. You an use Keil to code, compile and test the program code. The module is connected to the PC through serial port. Military uses high grade IR contaftless that are able to operate for distances of tacnometer 10Km to Km.

Interfacing Nokia Display to Micro Controller Moisture sensing automatic plant watering system using Can this circuit be purchased on this site? What is the use of burner circuit of microcontroller tachometfr this device?

The output is given in rpm revolutions per minute and the number of digits are increased from 3 to 5. Will be updated on this page.


Embedded Lab

Heart rate monitor with sms alert. The usage of LTH photo dgital module makes it more rugged and stable. Only one opamp inside the quad LM is used here and it is wired as a comparator with reference voltage set at 3. LCD tachometertachometer using V remote to operate properly from distance of 5m at the most, on a sunny day with average temperature of Kelvin.

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

Dual supply opamps configured in single supply mode will not give results like a dedicated single supply opamp in contacctless same situation. Leave a Reply Cancel reply Your email address will not be published. From the above two graphs you contactlrss 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 instruction CPL A will just complement the digit drive pattern in accumulator so that it becomes suitable for the common anode display.

You have to test and calibrate your sensors based on application. Voltmeter using Transistor intercom circuit. Next part is the signal conditioning unit based on the opamp LM IC1. Thank you for all. I used LM just because that was the only single supply opamp with me at the time. Digital tachometer using admin April 20, 39 Comments. Contactless digital tachometer using