Bi-Directional Logic Level Converter Hookup Guide - SparkFun Learn

Introduction Do you have a 3.3V I2C or SPI sensor that might go up in smoke if connected to a 5V Arduino? Or a 5V device that needs a workaround to be compatible with your 3.3V Raspberry Pi 4, Raspberry Pi Zero, RedBoard Turbo, RedBoard Turbo or Arduino Due? To get over this obstacle you need a device that can shift 3.3V up to 5V or 5V down to 3.3V. This is called logic level shifting. Level shift