3.3 v digital sensor

I have 2 sensors that work at 3.3 v can i connect them to the digital pins would they work? I noticed arduino uno has a 3.3 V pin but the values will be read correctly by the digital pins? Do i need to make some adjustments ?


Outputs from a 3.3v device have a high enough voltage that they read properly on a 5v Arduino.

However, if the sensor needs an output signal from the arduino to set it up or prompt a read then you will need to change the 5V output to a 3V3 signal for your sensor. Exactly what the best way of doing this is dependent on the actual sensor requirements.