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bad crystal?
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Please be positive and constructive with your questions and comments.

bad crystal?

by NeoRunner on Fri Feb 03, 2006 2:17 pm

Hello,

I have recently started putting my minty together and encountered an error when checking the crystal frequency. Measuring from the input pin to the PIC I am reading 60 Hz on a scope. I have 20pF caps on each side (C11 and C12) respectively. The crystal according to digikeys site is 18pF, could this be causing my loss of freq by "stalling" the crystal?

Thanks,
NeoR
NeoRunner
 
Posts: 4
Joined: Mon Dec 05, 2005 2:20 pm
Location: Ohio

Update

by NeoRunner on Fri Feb 03, 2006 3:08 pm

I did some more research, the 20pF should not affect the crystal and the crystal itself checks out ok. Any suggestions?
NeoRunner
 
Posts: 4
Joined: Mon Dec 05, 2005 2:20 pm
Location: Ohio

Update 2

by NeoRunner on Fri Feb 03, 2006 6:03 pm

Well I found the 60hz, just a ground issue and flourescent lights. Unfortunately I'm still not seeing a signal from the osciliator. My next worry is that the configuration bits on the PIC. :( Comments, suggestions welcome.
NeoRunner
 
Posts: 4
Joined: Mon Dec 05, 2005 2:20 pm
Location: Ohio

Please be positive and constructive with your questions and comments.