Ground problem !

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madreza

madreza

Well-known member
Joined
Mar 8, 2005
Messages
364
Location
Paris, France
Hi guys !
I ve copied a PCB , and as a beginer , I 'm having problems !

my biggest problem being the ground
when I measure resistance between 2 ground point on the original , I get something around 0.7ohms ( as on my bare pcb )
but while I solder everything I get 6.8Mohms !!!!
what's wrong in there ?

Thanks helping me out :D
 
I am very sorry, but the glass ball is having a vacation.  :)

In other words: what's the board? What's the schematic?

We can't even imagine what the problem could be without any info.

Maybe you could post some pics?
 
madreza said:
Hi guys !
I ve copied a PCB , and as a beginer , I 'm having problems !

my biggest problem being the ground
when I measure resistance between 2 ground point on the original , I get something around 0.7ohms ( as on my bare pcb )
but while I solder everything I get 6.8Mohms !!!!
what's wrong in there ?

Thanks helping me out :D
Click to expand...
The process of soldering should not cause the open circuit.  Did you measure it before soldering.

With the ohmmeter, place one probe at one end of the ground run... and probe along the run until it stops conducting.

JR
 

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