Arduino Forum

General Category => General Discussion => Topic started by: dprefont on Sep 12, 2017, 10:27 pm

Title: Arduino Nano 3.3v Pin?
Post by: dprefont on Sep 12, 2017, 10:27 pm
What is the purpose of the 3.3v pin on the Nano? I am currently using it to power a Nokia 5110 but I'm uncertain of the mA current limits for the pin. Can someone please help? the AT328 Atmel manual did not help.
Thanks.
Title: Re: Arduino Nano 3.3v Pin?
Post by: Robin2 on Sep 13, 2017, 10:01 am
The specs for the Uno (https://store.arduino.cc/arduino-uno-rev3) say you can draw 50mA from the 3.3v pin but there is no equivalent data for the Nano (https://store.arduino.cc/arduino-nano).

The 3.3v output is not part of the Atmega 328 - it is provided by a separate onboard voltage regulator.

...R
Title: Re: Arduino Nano 3.3v Pin?
Post by: dprefont on Sep 13, 2017, 04:05 pm
Ok, thanks. I'll use a 4050 between the Nano and Nokia 5110, both powered by the 3v Nano pin, and see what happens.