higher voltage on 1 data pin

by taky1 on Sat Nov 10, 2012 1:31 pm

I am getting a reading of 1.95V on one of the data pins and 4.65V on the other. The power pin is 5.07V. I do not see bridging on the any of the solder joints. I believe the data pin with the higher voltage is the R3/R4. I tested with brand new energizer AA batteries and the battery in my multimeter is also good. I will be using this with an iphone 4.

Thanks in advance.

I apologize for the picture quality.
mintyboost1.jpg
mintyboost1.jpg (139.83 KiB) Viewed 514 times

The red arrow indicates the data pin with the higher voltage.
mintyboost3b.jpg
mintyboost3b.jpg (80.53 KiB) Viewed 514 times
taky1
 
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Re: higher voltage on 1 data pin

by adafruit_support_bill on Sat Nov 10, 2012 2:33 pm

Check the soldering on R3. It is not clear in the photo, but it looks as if the lead closest to the USB connector is not fully soldered. That would explain the higher voltage.
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Re: higher voltage on 1 data pin

by taky1 on Sat Nov 10, 2012 3:54 pm

Thank you very much!!! That was the cause. I am now getting 1.95V on both data pins.
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