Problem on atm328p Lora board

By pbecchi at 2018-04-09 • 0 collector • 1530 pageviews

Connecting a brand already charged Turnigy battery(3.5 v)may have damaged the Mcp73831 chip. Now the board work only if connect to an Fri adapter. This is because 3.5 volts is to low battery voltage?

Unfortunately I have repeated the operation and on another board I have same failure!

Now I have to board the work only with external supply ! I also want to know if there is a safe mode for connecting disconnecting lipo batteries!

Please I need an urgent replay!

2 Replies | Last update 2018-06-22
2018-04-10   #1

After investigation it appear that is the diod Mbr120 that it is burn out! The Mcp73831 is still working, I will replace the diod with a stronger one. May be has been burnout by a peak of current at startup.

2018-04-19   #2

Hi, the didoe should be 1N5819, up to 1A. Good to know it is fixed. 

We will work for the low power, will see what we can do best to low the power.

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