I designed a shield that powers Arduino Uno with 5V trough Vin pin. For testing purposes I need to connect Uno to PC, and shield to 12V, but shield has a 5V regulator that powers Arduino Uno.. Will I damage anything if I connect Uno to PC with USB cable (that also has 5V supply)?

external 5V at Vin pin, and USB connection - UNO board

system February 27, 2011, 6:56am 6

Yes, I made a mistake, but If I change it like this:

Topic		Replies	Views
external 5V at +5V pin, and USB connection Project Guidance	13	8210	May 5, 2021
Soooo confused General Electronics	14	1609	May 6, 2021
concerns over using USB and an independent power supply at same time General Electronics	11	5584	May 6, 2021
Want to use external PSU to power UNO - is it Vin pin? General Electronics	10	1336	May 6, 2021
Arduino Uno Power Question Project Guidance	9	4878	May 5, 2021