[SOLVED] LED ON/OFF based on PWM using PIC

[prmurthy]

@prmurthy

I just wanted to make sure of your application in your own words. I'm afraid you have not understood the concept of pwm. Please take a look at this pwm fundamentals.

I surely accept this. I already told that may be I have not understood the PWM properly. No Doubt about this. I really mean it.

First of all, what pwm is that - it is not an on/off control.

Here is one basic question that is dependent on heater typically AC. Do they use PWM for reducing the voltage for various temperatures ??.

Now you would have understood your mistake in the above sentence - by varying the duty cycle, you do not vary the time period but the time during which the switch is on.
For ex, For the time period of 1s
50% duty cycle => Ton = 0.5s and Toff = 0.5s
25% duty cycle => Ton = 0.25s and Toff = 0.75s

Yes, I agree and I am sorry for bothering you all which I really do not study correctly. I am once again thankfull to all of you and I am sorry for any kind of mis-speach.

Thankyou all