0

Unable to charge DT71
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Unable to charge DT71

by cneuman27 on Fri Jul 23, 2021 11:33 am

Hi...

Recently ordered and received the Miniware DT71 Mini Digital Tweezers, and I am unable to charge it. I've tried several 5V adapters with no success. The LED will light on the test arms but never goes off to indicate a full charge, and the controller will not power on, even after 8 hours.

It seems that I have a defective unit (bad battery?). If there are other steps I should take to fix or troubleshoot this, please let me know.

Thanx much

cneuman27
 
Posts: 5
Joined: Mon Jan 25, 2021 4:00 pm

Re: Unable to charge DT71

by mikeysklar on Fri Jul 23, 2021 6:43 pm

Thank you for the detailed description of what you are seeing.

I take it that you cannot tell what firmware version it is running since the unit fails to power up? This is normally how you would check:

B83AD008-5D36-47D1-A2E4-D080521F577E.jpeg
B83AD008-5D36-47D1-A2E4-D080521F577E.jpeg (563.94 KiB) Viewed 101 times


If you wish to try a firmware update before we get into doing a return that would be helpful.

Firmware Update Page:

http://minidso.com/forum.php?mod=viewthread&tid=4244

Manual:

https://cdn-shop.adafruit.com/product-f ... +V1.05.pdf

mikeysklar
 
Posts: 5494
Joined: Mon Aug 01, 2016 8:10 pm

Re: Unable to charge DT71

by cneuman27 on Fri Jul 23, 2021 6:53 pm

Thanx for the quick response!

Yep - tried updating the firmware. Unfortunately, you are correct, I cannot verify the version because the controller won't boot with the arms attached.

Attaching the controller to the charging cable - gives the following voltage info:

DFU: 3.53
5.090 V

Let me know next steps please...

Thanx

cneuman27
 
Posts: 5
Joined: Mon Jan 25, 2021 4:00 pm

Re: Unable to charge DT71

by mikeysklar on Mon Jul 26, 2021 1:57 pm

If you could try the firmware upgrade process to version 1.08 that would be great.

Download the latest release here and drop the file onto the DT71 mounted device from a desktop machine. I think this will quickly tell us if you have a bad battery or just a controller that thinks you have a failed battery.

Latest FW:
http://www.minidso.com/forumdownload/DT71APP108.zip

Instructions pg. 15 of Manual v1.08:
http://www.minidso.com/forumdownload/DT ... 0V1.08.pdf

B9AB83AF-E827-4DDD-A595-D7B9384253A2.jpeg
B9AB83AF-E827-4DDD-A595-D7B9384253A2.jpeg (480.56 KiB) Viewed 77 times

mikeysklar
 
Posts: 5494
Joined: Mon Aug 01, 2016 8:10 pm

Re: Unable to charge DT71

by cneuman27 on Mon Jul 26, 2021 3:03 pm

I'm sorry, I guess I wasn't clear in my last post.

I did flash the firmware with 1.08 (twice now) - it appears to go thru (the file changes to *.RDY). However, the arms are still not powering up the controller. When I attempt to charge the arms, the LED never goes off to indicate a full charge (as stated in the documentation). Not sure how the firmware would affect that, as the controller is not connected during the
charging process.

Please advise as to next steps..

Thanks

Chris

cneuman27
 
Posts: 5
Joined: Mon Jan 25, 2021 4:00 pm

Re: Unable to charge DT71

by mikeysklar on Mon Jul 26, 2021 4:29 pm

Hi Chris,

Sorry to have asked you a second time about the firmware upgrade.

Have you also tried pressing the "hidden touch" button for modes (long press) and menu options (single tap). This is to be done while plugged in.

9BE7D2BE-6439-48B9-A3F2-9BB81CA12831.jpeg
9BE7D2BE-6439-48B9-A3F2-9BB81CA12831.jpeg (517.45 KiB) Viewed 74 times

mikeysklar
 
Posts: 5494
Joined: Mon Aug 01, 2016 8:10 pm

Re: Unable to charge DT71

by cneuman27 on Mon Jul 26, 2021 5:29 pm

Hi

Yes. I have tried to press the hidden touch button (while plugged into the arms). No response from the controller.

Chris

cneuman27
 
Posts: 5
Joined: Mon Jan 25, 2021 4:00 pm

Re: Unable to charge DT71

by mikeysklar on Mon Jul 26, 2021 7:39 pm

Gotcha. Let's swap this out.

Please send an e-mail to support@adafruit.com requesting a return/replacement for this DT71. Include your original order# and the link to this forum post.

mikeysklar
 
Posts: 5494
Joined: Mon Aug 01, 2016 8:10 pm

Re: Unable to charge DT71

by cneuman27 on Tue Jul 27, 2021 8:10 am

Thanx. Wil do

cneuman27
 
Posts: 5
Joined: Mon Jan 25, 2021 4:00 pm

Please be positive and constructive with your questions and comments.