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Noise with Atmega8l circuit
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saeed1980



Joined: 25 Oct 2009
Posts: 2
Post25 Oct 2009 17:01   

Noise with Atmega8l circuit
Hi,

I have a circuit for control an AC Motor with relays. but Noise in this circuit sometimes cause to do wrong subrutine in microcontroller. How can I get rid of Noice.

I installed capacitors before and after 7805.
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nandhu015



Joined: 11 Feb 2006
Posts: 640
Helped: 46
Location: Tamilnadu, India
Post25 Oct 2009 18:55   

Noise with Atmega8l circuit
Does your relay coils have free wheeling diodes? This may also cause mall functioning

Your Schematic will help us to help you

Nandhu
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saeed1980



Joined: 25 Oct 2009
Posts: 2
Post26 Oct 2009 15:43   

Re: Noise with Atmega8l circuit
Thank you for your answer.

Yes I used 1N4148 for this issue.is it ok or should i use 1N4007?

I draw a simple schematic in Paint, (sorry, I know it is funny). Please find attachment.

Sorry, but you need login in to view this attachment
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