4 Channel logic level converter
Safely steps down 5V signals to 3.3V and steps up 3.3V to 5V at the same time
Converter also works with 2.8V and 1.8V devices
The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using.
High voltage (5V for example) to the HV pin, low voltage (3.3V for example) to LV, and ground from the system to the GND pin.