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Published 20 hours ago • verified publisher icon Xinyuan-LilyGO

Battery boost convertor possibly failed. High pitch noise and modem not starting on battery

Open deeja opened this issue 11 months ago • 1 comments

I have 2 boards (A7670SA and A7670G) that are making a high pitch noise when running off battery. When running off battery,

  1. there is a noise,
  2. the modem doesn't power on, but the ESP module seems to work.

When running off USB,

  1. no noise
  2. modem works

These boards have been running for a few months off solar. Is there anything I can do to fix this?

deeja avatar Mar 25 '24 08:03 deeja

What voltage do you mean when the battery is exhausted? The circuit uses a DCDC boost converter. The whistling should come from the inductor. It should be that the battery voltage is no longer enough for the booster to work.

lewisxhe avatar Apr 06 '24 08:04 lewisxhe

This issue is stale because it has been open for 30 days with no activity.

github-actions[bot] avatar May 07 '24 02:05 github-actions[bot]

Thanks for updating. The project I'm working on is somewhat on hold. I will do some tests and see what voltage they are cutting out at. I think it might be related to the antenna too, but I will need to check when I have some time

deeja avatar May 10 '24 22:05 deeja