Adafruit (PID 395) TXB0108 8-channel Bi-directional Logic Level Converter TXB0108 8-channel Bi-directional Logic Level Converter Ready to use breakout board Includes headers Ideal for interfacing 5V micro controller like Arduino to 3.3V i2c and SPI sensors. It also works with 3.3V to 1.8V, 1.8V to 1.2V Some soldering required