Short circuit issue on EmonTx2.2 board

We find a short circuit problem on two EmonTx2.2 boards.  Does anyone meet the same problem.  the test image see in the attached files

[Edited to list the files - Moderator]

Robert Wall's picture

Re: Short circuit issue on EmonTx2.2 board

There is supposed to be a short circuit between the points you are measuring in photo 4 and photo 5. Both points are connected to the ground plane.

What your meter indicates in Photo 1 will depend on the voltage it uses to measure the resistance. What you are doing is powering the emonTx and so it will draw current which will show as a resistance reading.

Have you checked both sides of the PCB carefully for solder splashes and whiskers? Your soldering looks good from what I can see from the photos, but they are not sharp and I cannot see the details.

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