Can you power a 3.3 led with an arduino 5v output? - Electrical Engineering Stack Exchange
I have a led that can handle 10 milliamps at 3.3v. Can I use a voltage divider and a plus resistor to power it from an arduino nano 5v digital pin? Maybe something like this. simulate this circuit &
DIY Arduino Power Supply Shield with 3.3v, 5v and
Esp8266 Safely Pull 5V To GND On GPIO Electrical, 59% OFF
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Is there any way to have an Arduino Uno pin output 3.3V instead of 5V when it is high (looking for a non PWM solution)? - Quora
How much milliamps of current can the 5v and 3.3v pins of an Arduino Uno deliver? - Quora
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How to power an Arduino board using a 3.3v pin if the minimum voltage required to power an Uno board is 7v - Quora
Esp8266 Safely Pull 5V To GND On GPIO Electrical, 59% OFF