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pic 18f2580 wake up from weak analog signal

 
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lubom



Joined: 20 Apr 2006
Posts: 6

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pic 18f2580 wake up from weak analog signal
PostPosted: Tue Feb 26, 2008 3:29 am     Reply with quote
Hi,
Can anyone help me with idea how to wake up pic from very weak analog signal - between 10 and 20 mV peak on analog input pin?
I was thinking of using comparator interrupt?

Best regards,
lubom
kolio



Joined: 06 Feb 2008
Posts: 26

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PostPosted: Tue Feb 26, 2008 4:43 am     Reply with quote
It is possible, but you should tell more about DC and AC characteristics of the signal. There are different solutions for detection with comparator (assuming built-in one) depending on the signal's nature.
kysmet Wink
lubom



Joined: 20 Apr 2006
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PostPosted: Tue Feb 26, 2008 9:25 am     Reply with quote
it is stable 1V signal and it becomes 1.025V for about 0.1 sec.
Mersi Smile
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