LOGIC LEVEL CONVERTERDESCRIPTION Logic level shifter Bi Directional with 4 channels between high logic and low logic. 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. Logic level shifter Bi Directional with 4 channels between high logic and low logic. Connect a 3. 3V device