M5Stamp Cs3, USB powered Over-voltage warning

HappyUser

Hello,
As the title explains, M5Stamp Cs3 powered by USB from my laptop.
I noticed that the device is very hot.
I get this warning:
13:23:24.460 -> OVER-VOLTAGE WARNNING
13:23:24.460 -> OVER-VOLTAGE POWER DOWN

Suggestions how to deal with this?
Thanks

teastain

@happyuser What do you mean by M5Stamp Cs3? is it Stamp C3 or Stamp S3?
If it is 5V USB powered then it must be the load that it drives that is overheating the body.
Could you be more specific?

Cheers

HappyUser

Thanks,
more specific, indeed Stamp C3. And maybe the connected M5Stamp SIM7080C module draws a to high current from the 3.3 volt output on the Stamp C3. I am going t change that anyways, I am just testing.

felmue

Hello @HappyUser

according to the schematic the Stamp CatM has its own DC/DC converter from 5 V to 3.3 V so it should not draw any current from the 3.3 V output of the M5StampC3.

How exactly did you wire up the two?

Thanks
Felix

HappyUser

In this testing environment I wired it to the 3.3 volt output of the Stamp. Not the best solution, ha ha, given the power the SIM7080 module needs. I am now converting it to powering the SIM7080 module with separate 5 volt line.
That should do the trick.