Search found 11 matches

Thanks buddy. Laughing

I'm not trying ADC at the moment and my concentration is timer thing. I think I need the Tick approx 60* per second. I need your help to understand the calculation.
setup_tim ...

Hi Mike, answer of your questions:

1. Yes, I get the expected brightness
2. Yes, brightness is varying by the value of delay_ms (0-10ms).

However, adding ADC option changes the whole thing...i. ...

Thanks once again.

Actually my HW and code both works without the Timer INT. But I would like to implemen Timer INT since I'll be using an ADC to change the delay.

Working code (without Timer IN ...

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I've slept since then and suggest you simply post your new code, leaving the original post intact.
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Thanks Mike. I'll follow that next time.

I'm expecting that Triac will be fired after t ...

Thank you, Ttelmah. I changed the code as per your suggestion.
Kindly see above your post. Do you think the concept is right?

Because you want to adjust how long _after_ the zero cross, you fire the TRIAC.....
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So is it that...I can fire the triac through Timer INT without firing in while loop?
Sorry, I'm asking so m ...

Wonderful. Thanks Ttelmah. I really got it. Smile

as is the on time is only about 1 part in 2000 for a 50hz mains freq.

@asmboy: This is why I was asking about the max ON time.

By the way, I saw ...

Thanks Jay.
I used an LED in series with the opto and that really helped. Smile

I learnt the concept a bit now though still I have a few questions. Ttelmah suggested a 5uS delay (in while loop) to t ...

@Mike:
Sorry I forgot to answer your question. I was just experimenting triac firing at zero from PIC. I added some delay (on/off) to make the light on/off visible. But I understand now, my thinking ...

Many thanks buddy for your responses. I'm actually trying to learn about Triac firing by the PIC.

Here is the actual schematic. I hope zero crossing is ok. By the way, I forgot to draw the crystal ...

Hi:

I'm new to PIC MCU.

I'm doing an experiment with the PIC16F6886 to trigger a Triac to switch (ON/OFF) an AC lamp. But the triac is not correctly triggering. Actually triac is triggered at ze ...