3V Arduino options

Using Arduino Microcontrollers
1

Hi,

I have an Arduino Mega board to test 3V devices. Which is the simplest way to connect those 3V devices to the Arduino Mega (it works at 5V) without burning them? I saw the Adafruit Trinket works at 3V, could be an option? Since I need many input/outputs (around 50), Arduino Mega is the most suitable in terms of input/outputs pins.

What do you suggest me to do?

Thanks.

2
3

REM14:
What do you suggest me to do?

Dump the Meaga an use a Arduino DUE.

Same layout and pin numbers as the Mega and operates at a far more modern device friendly 3.3V.