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Noisy voltage

 
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Eugeneo



Joined: 30 Aug 2005
Posts: 155
Location: Calgary, AB

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Noisy voltage
PostPosted: Fri Jul 28, 2006 5:20 am     Reply with quote
Can +-150mv ripple at 5 volts cause a pic behave erratically.
rnielsen



Joined: 23 Sep 2003
Posts: 852
Location: Utah

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PostPosted: Fri Jul 28, 2006 8:47 am     Reply with quote
It depends on what your Brownout is set to. It's possible that you have a very fast spike, that you might not be seeing, that is causing the problem. Get it cleaned up as much as possible. A noisy power supply is not an electronic circuit's best friend. If Brownout is not enabled then the ripple should not affect it that much. Most PIC's should be able to operate properly at 4.2v. There's several things that could cause erratic behavior, specifically the code. Cool

Ronald
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