- Tue Jun 02, 2015 3:16 pm
#182430
I have an Arduino Pro Mini 328 5v/16Mhz which I want to use with the MPU-9150 breakout (9DOF IMU). I've set up a proto board with the IMU using the LD1117V33 voltage regulator with a 3.3v output and a bi-directional logic level converter.
I am able to test the IMU by attaching it to my regular Arduino Uno R3, no problem. I use the dedicated SDA/SCL lines and digital pin 2 for the interrupt signal. Everything is fine.
I was looking over the schematic for the Pro Mini which uses the A4/A5 pins for the I2C connection. The schematic shows two "optional" pullup resistors for I2C lines. Do I need those resistors? If so, what value should they be? The schematic implies they should be inserted in-line with the logic level converter pins. Is that correct?
Thanx,
I am able to test the IMU by attaching it to my regular Arduino Uno R3, no problem. I use the dedicated SDA/SCL lines and digital pin 2 for the interrupt signal. Everything is fine.
I was looking over the schematic for the Pro Mini which uses the A4/A5 pins for the I2C connection. The schematic shows two "optional" pullup resistors for I2C lines. Do I need those resistors? If so, what value should they be? The schematic implies they should be inserted in-line with the logic level converter pins. Is that correct?
Thanx,