Communicate between a development board and other components, such as sensors and actuators, that use digital signals at a different voltage. Connect your high-voltage power source and devices to one side and your low-voltage power source and devices to the other. These converters have four independent communication channels, each of which connects high-voltage devices to low-voltage devices. All channels are bidirectional, converting voltage from high to low and low to high, so they support protocols such as I²C that send data in both directions on a single wire. They’re often used between a 5V DC device and a 3.3V DC device, but will work with any voltages within the listed range. For fast prototyping, solder on headers and plug them directly into a breadboard. For a permanent connection, solder on wires.