0

QT PY Short
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

QT PY Short

by EasternStandard on Mon Aug 02, 2021 4:25 pm

Hello I received an email from the support staff at adafruit that I need to post my issue here about my QT PY SAMD21 microcontroller. My order number is 2596192-2091787249 for reference.

Upon taking my QT PY out of the bag and plugging it into a USB connector to my computer the board would not power on. After trying several cables and computers the board would still not power up. Bringing the device to our benchtop we discovered that there was a short between the 3V and GND line on our board. We then confirmed this short with another power supply that was giving us an error code for the short. This issue appears to be present on both of the boards we have ordered.

Thank you for your time and I look forward to hearing back.

EasternStandard
 
Posts: 2
Joined: Mon Aug 02, 2021 4:20 pm

Re: QT PY Short

by adafruit_support_mike on Mon Aug 02, 2021 9:59 pm

Hmm.. could you post a photo showing the test you did please? 800x600 images usually work best.

All the boards we make have to pass a series of functional tests before they’re approved for sale, but the symptoms you described could indicate a problem somewhere in the test system.

adafruit_support_mike
 
Posts: 63679
Joined: Thu Feb 11, 2010 2:51 pm

Re: QT PY Short

by EasternStandard on Tue Aug 03, 2021 9:32 am

Hello,

Attached is a photo of one of our USB power monitors indicating a power fault and we tested the short using a our DMM looking for continuity across the 3V and GND pins.

Thank you,
Josh
Attachments
20210803_092710.jpg
20210803_092710.jpg (948.34 KiB) Viewed 81 times

EasternStandard
 
Posts: 2
Joined: Mon Aug 02, 2021 4:20 pm

Re: QT PY Short

by adafruit_support_mike on Tue Aug 03, 2021 4:47 pm

Thank you. I’ll pass that on to our QA team.

Send a note containig a link to this page and your order number to support@adafruit.com. The folks there will get you a replacement QtPy.

adafruit_support_mike
 
Posts: 63679
Joined: Thu Feb 11, 2010 2:51 pm

Please be positive and constructive with your questions and comments.