Pulse width modulation Items tagged with Pulse width modulation

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.
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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... Read Compelte post

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... Read Compelte post

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..
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