I am trying to understand the meaning of a 3.3v or 5v IC but I don't know how to use the right keyword in search engine to find the explaining article so I'll explain...
We know Arduino UNO R3 as example have 5v and 3.3v power out pins so I could use to to supply the Sensors or other components in circuit but sometime I read "this sensor is 5v only" or "3.3v only", what does that mean? Does that mean you should power the sensor with five volt or the 5 volt for IO pins of sensor and if the sensor 3.3v does that mean this value for IO pins of data like 3.3v that means Logic 1 and if 0V that's mean Logic 0 and the same things for 5V.
I read Arduino Mega difference than Arduino Duo because Duo is 3.3v only, I hope to fine some explaination of how to solve problem like this if we want to run 3.3v sensor on 5V MCU or 5V sensor on 3.3V MCU . Do I need level shifting ?
Second question Seeedstudio say their sensor "Grove - IMU 9DOF v2.0" is Working Voltage: 5V
the schematic for board design
show use of 5V to 3.3v voltage regulator for input of chip while the chip used is InvenSense MPU-9250 when I check the Voltage - Supply for Chip in Digi key I found it 2.4 V ~ 3.6 V, can someone explain if that this 3.3v for IO pins for data because it use I2C as data bus or what?
Thanks for everyone shearing his knowledge in this site,