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adalogger 32u4 soldering damage?
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adalogger 32u4 soldering damage?

by Hobo_Jobo on Fri May 27, 2022 5:59 pm

Hi, I've been playing around with the mini GPS pa1010d and had finally decided to wire my project more permanently.
I did have the Stemma QT breakout cable, but the end of the pins snapped, so I decided to just solder directly as per the Arduino I2C diagrams for the PA1010d

Here's the problem...
When soldering the 3.3v pin on the 32u4, I slipped and the soldering iron touched the board.

I cant see any visible damage, but I'm now only getting 0.54v from the 3.3v pin, regardless of if the board is USB or LiPo powered.

Is there any other reason why this could happen???

Hobo_Jobo
 
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Re: adalogger 32u4 soldering damage?

by dastels on Fri May 27, 2022 7:12 pm

It's possible. Can you post a clear closeup of that area of the board?

Dave

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Re: adalogger 32u4 soldering damage?

by Hobo_Jobo on Sat May 28, 2022 2:42 am

Thanks Dave, here's the front and back of the board.
Attachments
feather 32u4(2).jpg
feather 32u4(2).jpg (358.47 KiB) Viewed 109 times
feather 32u4(1).jpg
feather 32u4(1).jpg (413.44 KiB) Viewed 109 times

Hobo_Jobo
 
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Re: adalogger 32u4 soldering damage?

by dastels on Sat May 28, 2022 11:30 am

Great photos! Thanks.

It looks a little messy and I'm wondering if there is some stray solder around the pads.

Also, those aren't very good looking solder joints. See how they are round and ball-like? They should look more like circuit tents. See https://learn.adafruit.com/adafruit-guide-excellent-soldering and https://learn.adafruit.com/collins-lab-soldering.

Dave

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Please be positive and constructive with your questions and comments.