AVR-Chat

What happens if you disconnect the output of your sensor from the MCU board. Then, look at the ultrasonic output with your scope. Is the pulse there or not there? It may be that the problem is entirely in the sensor! 


Jim Wagner 

----- Original Message -----
From: "Elham B" <elhamb88@ymail.com> 
To: AVR-Chat@yahoogroups.com 
Sent: Wednesday, October 10, 2012 12:49:25 PM 
Subject: Re: [AVR-Chat] noise problem 






an ultrasonic module connected to interrupt, 
i upload the attachment into the photos,,, 
in this circuit dc motor connected to micro,,if output of ultrasonic pull down the INT1 ,dc motor running...but the interrupt is 
getting interrupted unintentionally by the noise 
what's happening??? 

________________________________ 
From: Jim Wagner < wagnejam99@comcast.net > 
To: AVR-Chat@yahoogroups.com 
Sent: Wednesday, October 10, 2012 8:58 AM 
Subject: Re: [AVR-Chat] noise problem 

There is not enough information to provide any help. 

What is PD3 connected to? 

Why do you have an interrupt for PD3? 

What do you mean by "operating uncaused"? Every action must have a cause! 

What do you mean by "driving a dc motor in the interrupt"? (I assume you mean driving instead of deriving). 

Jim Wagner 
Oregon Research Electronics 

On Oct 9, 2012, at 12:50 PM, Elham B wrote: 

> noise!!! 
> my project is with micro avr,atmega32. 
> pinD.3 , external interrupt ,operating uncaused!! 
> because of noise!! 
> I deriving a dc motor in the interrupt , 
> i using capacitors in every where that was nesseccery for solving this problem... 
> pleesssee help meeeee :-( 
> what can i do???? 
> 
> 

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