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Pulse Width modulation

An 8051 Based Temperature Controlled Fan project

Forum -> Project Help

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:

CODE:

|¯¯|__|¯¯|__|¯¯|__ ---> 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 cycl...[more]

pulse width modulation PWM 8051 PWM code

Posted by Ajay Bhargav on Monday 20 August 2007 - 05:45:25

RS232 Simulation?

Forum -> Project Help

actually speed of DC motor changes when you change the voltage of motor... and in digital world this is done with the help of Pulse width modulation.
So i think you should see this for learning about PWM.
I have no idea whether x86 processors have timers or not.. if not then it will be difficult to generate PWM, or you have to make use of some external thing to generate PWM.
Please go through this to...[more]

pulse width modulation PWM

Posted by Ajay Bhargav on Wednesday 16 January 2008 - 22:30:53

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.
...[more]

pulse width modulation 8051 pwm code avr pwm example code implement pwm 8051 pulse width modulation 8051

Posted on Monday 18 February 2008 - 12:55:43

An 8051 Based Temperature Controlled Fan project

Forum -> Project Help

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..

CODE:

org 0H

sjmp start

org 0BH

TIMER_0_INTERRUPT:

   JB F0, HIGH_DONE    ; If F0 is set then we just finished the high section of the

LOW_DONE:              ...[more]

PWM pulse width modulation 8051 PWM code PWM sample code

Posted by Ajay Bhargav on Thursday 30 August 2007 - 06:05:26

Designing Embedded Hardware

Forum -> 8051

Book Description
Embedded computer systems literally surround us: they're in our cell phones, PDAs, cars, TVs, refrigerators, heating systems, and more. In fact, embedded systems are one of the most rapidly growing segments of the computer industry today. Along with the growing list of devices for which embedded computer systems are appropriate, interest is growing among programmers, hobbyists, and...[more]

Designing Embedded Hardware ebook book I2C SPI USB infrared communication Motorola 68000-series CAN and Ethernet networking motor control Pulse Width modulation

Posted by elector on Tuesday 07 November 2006 - 05:12:31

Designing Embedded Hardware

Forum -> Microcontroller, Microprocesor and Embedded

Designing Embedded Hardware
By John Catsoulis

* Publisher: O'Reilly Media, Inc.
* Number Of Pages: 396
* Publication Date: 2005-05-16
* Sales Rank: 244756
* ISBN / ASIN: 0596007558
* EAN: 9780596007553
* Binding: Paperback
* Manufacturer: O'Reilly Media, Inc.
* Studio: O'Reilly Media, Inc. More...Book Description:

Embedded computer systems literally surround us: they're in our cell phones, PDAs, cars, TVs, r...[more]