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need help for debugging my schematics & pcb
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jean bender



Joined: Feb 21, 2010
Posts: 133
Location: france

PostPosted: Wed Jul 25, 2012 5:49 pm    Post subject: need help for debugging my schematics & pcb
Subject description: first time i do it and i don't see what doesn't work...
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Hi all.
I've developped a little noise box on breadboard, made a schematic, and i've already built three units from my schematic...
it's a pretty simple noise boxe, and i thought it would be easy to make a pcb from it.
I did it, but... it doesn't work, nothing.
i give you here my eagle files, if someone can check it and give me a trick... i would be very happy to understand what happens... or if you preffer, why nothing happens once my pcb drilled and populated.
thanks per advance...


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jean bender



Joined: Feb 21, 2010
Posts: 133
Location: france

PostPosted: Thu Jul 26, 2012 2:06 am    Post subject: Reply with quote  Mark this post and the followings unread

ok, forgot my request, i've found the problem : two of the three 4011 osc are miswired, their condensators should be before the pot, and not after.
this works now.

not always easy to debug something when you still discover everything !!

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