jayendra mishra

Important changes to forums and questions

All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.

8 years, 3 months ago.

can this device support 9v dc power supply from vDD?

nucleo l15

Question relating to:

Last updated: 20 Apr 2021
Affordable and flexible platform to ease prototyping using a STM32L152RET6 microcontroller.

Mr. Andy, is there any amperage limit too. I mean is it harmful for the micro chip to run on 1A power supply at 9v?

posted by jayendra mishra 05 Jan 2016

1 Answer

Andy A
8 years, 3 months ago.

From the page linked to in your question:

Flexible board power supply: USB VBUS or external source (3.3 V, 5 V, 7 - 12 V)

9 is between 7 and 12 so yes it will run from 9V.

Accepted Answer

Mr. Andy, is there any amperage limit too. I mean is it harmful for the micro chip to run on 1A power supply at 9v?

posted by jayendra mishra 05 Jan 2016

That's not how electricity works. A 9V 1A power supply doesn't always supply 1A no matter what, it can supply up to 1A before the voltage starts to drop below 9V. How much current is taken depends entierly upon what you connect.

posted by Andy A 05 Jan 2016