MaiTech I2C 03100573 Level Shifting Module / 5-3V System Compatible Arduino Sensor Module - Blue
I2C level shifting module 5-3V System Compatible; AVCC connects to 5V system supply; ASCL connects to 5V systems SCL; ASDA connects to 5V systems SDA; AGND connects to 5V system GND; BVCC connects 3V system power; BSCL connects 3V systems SCL; BSDA connects 3V systems SDA; BGND connects 3V system GND.