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4 years ago.
Power supply for NUCLEO-F303K8
I'm trying to understand how to properly supply the NUCLEO-F303K8 board. I don't fully understand a lot of electric theory and I'm scratching my head about what to do.
At which voltage can I run it? And how flexible is that value?
I'll make a practical example for clarity. I want to power the board through a 3.7V LiPo rechargeable battery and I read on the manual that the device can run on either 3.3V or 5V depending on where the supply is received. Fine, but... Can I still use that intermediate 3.7V value? What power mode will I use to input it: 3.3V or 5V?
The alternative would be to use a 4.8V NiMH rechargeable battery pack, but the LiPo solution is more compact and even cheaper all considered.
Thanks for your help
4 years ago.
Any time the voltage is higher than the maximum rating you will have a problem. That said you can not feed a 3.7 volt power supply like your battery into the 3.3V input as it will damage the processor. So what to do? You will have to feed the power into the 5V external input. The particular 5V to 3.3V converter on the Nucleo board can take a low voltage and keep running but it may not work for as many hours as you maybe would like.