Help with Gemma and Micro-Lipo Charger for a wearable

Wearable electronics: boards, conductive materials, and projects from Adafruit!

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
User avatar
project_zero
 
Posts: 86
Joined: Tue Sep 10, 2013 11:22 pm

Re: Help with Gemma and Micro-Lipo Charger for a wearable

Post by project_zero »

Hi Bill - I emailed support@adafruit about this, but they told me I had to use the forum instead. Here is my message:
SUBJECT: Gemma M0 Dead on Arrival

Hi there,

Last month I purchased an Adafruit Gemma M0 (Order
#3018084-7562566998) for a wearable project that I'm very excited
about - a glowing crown with a built-in rechargeable lipo battery. I
will definitely share pictures with the Adafruit team when I'm done. I
have never used a Gemma before so this was a new experience for me.
For the life of me I couldn't get it to work. I installed all the
required drivers and Adafruit and Arduino libraries for it, but when I
plugged it into my PC, nothing. It wasn't even recognized and I didn't
see a light or hear a beep from my PC. Fortunately I had bought two -
in exasperation I plugged in the second one, and ping, it worked like
a charm.

So I can only conclude that one of my Gemmas was dead. Can I get a
replacement sent to me? I actually plan to place another Adafruit
order so if I could get a code for the Gemma and a shipping code that
would also work. If you want to send me a replacement Gemma separately
that is also ok.
The picture is the same as the setup pictured in this thread. I ended up taking out the totally unresponsive Gemma and putting in the one that wasn't dead. The circuitry didn't change at all.

User avatar
adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

Re: Help with Gemma and Micro-Lipo Charger for a wearable

Post by adafruit_support_bill »

It wasn't even recognized and I didn't see a light or hear a beep from my PC.
Not even the power indicator LED on the Gemma?

Can you post a close-up photo of the front of the Gemma showing the area around the USB jack?

User avatar
project_zero
 
Posts: 86
Joined: Tue Sep 10, 2013 11:22 pm

Re: Help with Gemma and Micro-Lipo Charger for a wearable

Post by project_zero »

Not even the power LED. Absolutely nothing happened when I plugged in this Gemma M0. I troubleshot the USB cable by plugging in an Arduino Metro and flashing code to it. And it is the same cable I ended up using with my second, not-dead Gemma M0. I will post a picture of the dead Gemma M0 when I get home from work.

User avatar
project_zero
 
Posts: 86
Joined: Tue Sep 10, 2013 11:22 pm

Re: Help with Gemma and Micro-Lipo Charger for a wearable

Post by project_zero »

Hi Bill, here is a photo.
F3651830-A4F3-44A9-9640-2FDB18E2B228.jpeg
F3651830-A4F3-44A9-9640-2FDB18E2B228.jpeg (473.88 KiB) Viewed 117 times

User avatar
adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

Re: Help with Gemma and Micro-Lipo Charger for a wearable

Post by adafruit_support_bill »

Thanks for the nice clear photo. I initially suspected a dry solder joint on the USB jack. But they all look OK. Could be a bad contact internal to the jack itself. The power-LED is connected directly to the VBUS pin, so there is not much room for things to go wrong.

Please contact [email protected] and include a link to this thread. They will arrange for a replacement Gemma for you.

Locked
Please be positive and constructive with your questions and comments.

Return to “Wearables”