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Minimal Voltage Supply
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Minimal Voltage Supply

by _mirk on Wed May 19, 2021 5:15 am

Can the Fona 3g run on 3.0 Volts? I only found the recommended minimal Voltage, in the Datasheet, which would be 3.3 Volts, but my LiPo Battery would run from 3.7 to 3.0 Volts.

_mirk
 
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Re: Minimal Voltage Supply

by blnkjns on Wed May 19, 2021 12:53 pm

Most GSM modules are taylored for battery use, either LiPo or LiIon. Both are roughly 3,7 V with some margin, little higher totally full, around 4V, little lower when near empty. I think you already want to stop draining the battery before it goes as low as 3.0 V.

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Re: Minimal Voltage Supply

by rskup on Wed May 19, 2021 2:19 pm

Hi Mirk, are you concerned that if the LIPO gets below 3.3 volts you might ruin the FONA 3G? I've run my LIPO battery too low a couple times and the FONA just got "flaky" and soon afterwards shut off, then ran fine again after charging the battery.

If by chance you're wondering can the board work using 3 volt logic, then yes, my FONA 3G is paired to an Adafruit Feather (#2771) and works just fine.

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Re: Minimal Voltage Supply

by blnkjns on Wed May 19, 2021 2:33 pm

3V is perfect for feathers and M0/M4's etc, but it might be too low for the cellular antenna. But you can never ruin it with a too low voltage. It will return to normal operation when the voltage gets high again.

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