POWERING UP STM32 NUCLEO L011K4

[rilso]

hi i have a  STM32 NUCLEO L011K4 working perfectly, i’m looking for ways where if i could power it up from external power source example battery through pins

 

[ahsrabrifat]

Yes, the NUCLEO-L011K4 can be powered through its header pins:

• For a 7-12 V battery/source, connect positive to Vin and negative to GND. The onboard regulator will generate the required voltages.
• For a regulated 5 V source, connect it to the +5V pin and GND. Keep it within approximately 4.75-5.25 V.
• A single 3.7 V Li-ion/LiPo battery cannot reliably power Vin; use a 5 V boost converter instead.
• Avoid powering it simultaneously from USB and an external source. If USB is needed for debugging, apply external power first and then connect USB.

Direct 3.3 V injection is possible, but it bypasses the regulator and requires board solder-bridge changes, so I would avoid it unless you follow the Nucleo-32 manual carefully.

This STM32 board-design tutorial also provides a useful explanation of regulating an external 5 V source down to the 3.3 V required by an STM32.

[rilso]

i tried supplying 5v using a regulator and then when check for the V on 5V and GND, i received 1.27v-1.37v

Same goes for 7-12v , source power of 8v to VIN, and GND, it receive 2.28V is this normal?
 or could there be an issue with the board/power path? Also, should I be measuring the voltage on some other pins?

Also what is the best way to indicate if the stm32 is receiving power and working properly?

Thanks

[rilso]

​@ahsrabrifat could this be because it has been short?

 

Earlier it was receiving 3.3v when a regulated 5v source was provided?

 

Thanks