Dear
I have a question about how to connect the accelerometer MMA8452Q working with 3,3V the arduino 2560 that works with 5v, using the I2C protocol.
I've been reading and some materials that speak, it is necessary to disable the pull-up resistors of the library "Wire" and then connect the arduino MMA8452Q linking their SCA and SCL, and MMA8452Q connect the 3.3 V output of 3, 3V arduino and then add pull-up resistors external doors SCA and SCL but linking to 3.3 V?
I wonder if this approach is right, if someone has an example (schematic and source code using the library "Wire").