Hello!
After receiving a few weeks ago my Adafruit Metro M0 Express I wanted to try out yesterday for the first time powering it through the DC jack connector using a 4xAA battery pack. I realized that the board does not power-up at all. Powering it through micro-USB works just fine and I checked that the battery pack works with some Arduino boards I had sitting around. It looks like the connector is dead. I have another 11 boards on order for a course I will be teaching in a few weeks where I wanted to have the student work on some autonomous IoT projects, but now I'm worried I'll have to change plans significantly. Any help with this would be really appreciated.
Thank you!
Metro M0 Express DC jack connector not working
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Please be positive and constructive with your questions and comments.
- ohm314
- Posts: 8
- Joined: Wed Mar 21, 2018 10:15 pm
- manor
- Posts: 11
- Joined: Fri Mar 30, 2018 3:24 pm
Re: Metro M0 Express DC jack connector not working
I can get mine to run from a 9V battery. I think 6.4V-4V is not supposed to work...
Something about a "haircut", as explained here:
https://learn.adafruit.com/ladyadas-lea ... and-supply:
Something about a "haircut", as explained here:
https://learn.adafruit.com/ladyadas-lea ... and-supply:
- ohm314
- Posts: 8
- Joined: Wed Mar 21, 2018 10:15 pm
Re: Metro M0 Express DC jack connector not working
Hi manor,
hmm.. but in the board documentation (https://cdn-learn.adafruit.com/download ... python.pdf) it says:
and by the way, for anyone curious: https://foundations.rhizomeacademy.org/
hmm.. but in the board documentation (https://cdn-learn.adafruit.com/download ... python.pdf) it says:
So, I thought this should work...The DC Jack is a 5.5mm/2.1mm center-positive DC connector, which is the most common available. Provide about 6V - 12V
here to power the Metro. There is no fuse on this connection so you can draw more current, up to 800mA between
the 5V and 3.3V supplies, and 2A from Vin.
and by the way, for anyone curious: https://foundations.rhizomeacademy.org/
- Franklin97355
- Posts: 23910
- Joined: Mon Apr 21, 2008 2:33 pm
Re: Metro M0 Express DC jack connector not working
What batteries are you using and have you measured the voltage they are supplying?
- manor
- Posts: 11
- Joined: Fri Mar 30, 2018 3:24 pm
Re: Metro M0 Express DC jack connector not working
I just sent you a contact request through the association's contact page. Very nice initiative!
- ohm314
- Posts: 8
- Joined: Wed Mar 21, 2018 10:15 pm
Re: Metro M0 Express DC jack connector not working
I use regular alkaline AA batteries and the four are supplying 6.3V together... so.. I think that should be fine..? :)franklin97355 wrote:What batteries are you using and have you measured the voltage they are supplying?
Thanks :) and you got a reply!manor wrote:I just sent you a contact request through the association's contact page. Very nice initiative!
- BryonMiller
- Posts: 222
- Joined: Fri Mar 04, 2016 10:34 am
Re: Metro M0 Express DC jack connector not working
Excuse me for butting in but I just gotta ask - Have you made sure the on-off switch is in the ON position? Mine was delivered with the switch OFF.
- ohm314
- Posts: 8
- Joined: Wed Mar 21, 2018 10:15 pm
Re: Metro M0 Express DC jack connector not working
Oh god.. I feel so incredibly stupid right now.. Will the earth please open up and swallow me!BryonMiller wrote:Excuse me for butting in but I just gotta ask - Have you made sure the on-off switch is in the ON position? Mine was delivered with the switch OFF.
Thank you BryonMiller!
Please be positive and constructive with your questions and comments.