higher voltage on 1 data pin

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taky1
 
Posts: 2
Joined: Sun Oct 14, 2012 7:57 pm

higher voltage on 1 data pin

Post by taky1 »

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 837 times
The red arrow indicates the data pin with the higher voltage.
mintyboost3b.jpg
mintyboost3b.jpg (80.53 KiB) Viewed 837 times

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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: higher voltage on 1 data pin

Post by adafruit_support_bill »

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.

taky1
 
Posts: 2
Joined: Sun Oct 14, 2012 7:57 pm

Re: higher voltage on 1 data pin

Post by taky1 »

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

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