RFM95 could be destroyed by full 18650.

hallard / Mini-LoRa

Arduino Mini Lora Battery/Sensors Board

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RFM95 could be destroyed by full 18650. #4

Closed mvdswaluw closed 5 years ago

mvdswaluw commented 5 years ago

Hello,

a freshly charged 18650 could destroy your RFM95 in this design. The charged battery will give 4.2V, while the absolute max voltage of the RFM95 is 3.9V. This could be solved by adding a power regulator on the PCB triggered by the TPL5510 like in on the "trigboard", or low-budget by adding a diode to get some mV drop for the RFM95 VCC.

hallard commented 5 years ago

Absolutely, That's why the 18650 charged battery is not in the BOM file, only 3.6V battery.