STM32F405 Express Feather doesn't charge

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pchokron
 
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Joined: Wed Sep 08, 2021 5:37 pm

STM32F405 Express Feather doesn't charge

Post by pchokron »

Hi,

I started a CircuitPython GPS project with the following:
- STM32F405 Express Feather
- 128x64 OLED FeatherWing
- Ultimate GPS FeatherWing
- FeatherWing Tripler

Everything works as expected, after getting a GPS fix, I can read and display position/speed/etc. However, the battery never charges when the USB is connected. The charging LED (next to the USB connector) is always off. A couple of days ago, I saw it light up but it was VERY dim (barely visible). I suspect a problem with the charging circuit on the STM32 feather. I've tried to remove the STM32 feather from the tripler and ONLY connect it to the USB-C and battery. No difference (i.e. no LED, no charging).

The pictures show the setup with and without the battery. The OLED displays the result of the "get_voltage()" function and correctly reports the battery voltage when it is connected (verified independently w/ multimeter).

Any ideas of other things I can try to confirm or rule out a defective charging circuit?

Thanks
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dastels
 
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Joined: Tue Oct 20, 2015 3:22 pm

Re: STM32F405 Express Feather doesn't charge

Post by dastels »

That seems pretty conclusive.

Please email [email protected] with a link to this thread, your order number, and request the replacement of one STM32F405 Feather Express.

Dave

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