Pulse Width Modulation Tutorial

Pulse Width Modulation tutorial



Introduction to PWM
The theory behind pulse width modulation
and its working.


8051 PWM Example
Implementation of PWM on normal 8051
using timers, along with sample code.


AVR PWM Example
Using timers of AT90S8515 in 8-bit PWM
mode with non-inverting o/p, with sample code.

... Read Compelte post
Posted on Mon Feb 18 2008, 08:55 PM

An 8051 Based Temperature Controlled Fan project

PWM is Pulse width modulation.. it helps you to control the output voltage by varying the width of a square wave pulse..

A Brief Description:

|¯¯|__|¯¯|__|¯¯|__ --->
 A square wave

|¯¯¯¯¯¯|______
<-Ton->
<-Tof->
.
<---Ttotal--->


Ttotal = ton+toff

Duty cycle d = Ton/Ttotal

if Vin is the input voltage and Vo is the o/p voltage.. then

Vo = d x Vin
where d is the duty cycle..
now if we ... Read Compelte post
Other Tags: pulse width modulation   PWM   8051 PWM code   
Posted by ajay_bhargav on Mon Aug 20 2007, 12:45 PM

An 8051 Based Temperature Controlled Fan project

I think there is some problem with the attachment of file.. i need to check that..
By the time.. please try to paste the code..

here is a sample PWM code.. check it..
... Read Compelte post
Posted by ajay_bhargav on Thu Aug 30 2007, 01:05 PM

Conversation

Sat Jan 18 2020, 07:24 AM
Charles Halfey
Kind Regards,
Tue Jan 14 2020, 07:08 AM
shubham kharade
when i am trying to simulate the program in Proteus 8 professional, I am getting some errors as cannot find module file dhtxx.md can u help me
Tue Dec 17 2019, 01:44 PM
Devangi
hello..i am programming industrial timer using 8051 with 24lc64 eeprom. i have query in storing the 3 diff value in eeprom with enter button. can anyone share c code ?
Tue Dec 17 2019, 10:30 AM
Andrius
Hello. Can anyone share the code in Bascon and scheme in Proteus?
Thu Nov 21 2019, 12:30 PM
raj2555
how to interface 8051 microcontroller with NRF24L01+ module
ExperimenterUK
Sat Oct 12 2019, 10:23 PM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 10:18 AM
Bhadra Sajikumar
i am doing a countdown timer with 8051 for my project, unfortunately our professor had to take a leave of absence before he could teach us most of it.. can someone explain the .asm code of it for me?
Mon Sep 23 2019, 07:37 AM
Nathaniel
I am doing a project for my schools wireless security system with cameras,sensors and spot lights using 8051 micro controller, could you help me out with the design and its source code.
Wed Sep 18 2019, 08:48 PM
Caryn Kover
Thank you for your time,
ExperimenterUK
Mon Aug 05 2019, 07:09 PM
@Ismail ..post in forum, give details

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usb5962
Sat Jan 11 2020, 10:42 AM
elt
Tue Jan 07 2020, 06:53 PM
mg3914697
Tue Jan 07 2020, 12:42 PM
afds43
Sun Dec 29 2019, 05:54 AM
Rupeshpatil
Fri Dec 27 2019, 06:14 PM
pyxus
Sat Dec 14 2019, 12:31 PM
Istika
Thu Dec 12 2019, 12:04 PM
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Sun Dec 08 2019, 09:16 AM

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Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Jan 17 2020, 10:24 PM
We will need the circuit diagram.A Proteus simulat...
Billz Avatar
Posted By Billz
Sat Jan 11 2020, 05:43 PM
hi everyone please attached files are my c code fo...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Jan 07 2020, 08:18 PM
Not a stupid question.Setting up "Eclipse" can be...
elt Avatar
Posted By elt
Tue Jan 07 2020, 07:06 PM
So i have just began learning programming micros a...
Billz Avatar
Posted By Billz
Mon Jan 06 2020, 09:22 PM
I think it would be better if you guys try to come...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon Jan 06 2020, 12:22 AM
Can you post a circuit diagram and any code you ha...
Billz Avatar
Posted By Billz
Sun Jan 05 2020, 08:17 PM
Need help regarding C code (specifically for PIC 1...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon Dec 30 2019, 06:42 PM
Can you give more details of your problem.
Rupeshpatil Avatar
Posted By Rupeshpatil
Fri Dec 27 2019, 06:21 PM
How to copy program my old microcontroller to new ...
ilylily07 Avatar
Posted By ilylily07
Thu Dec 12 2019, 02:26 PM
wil do.thank you for your advice!