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Description: The level converter is very easy to use. 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 Small module with 1.3cm X 1.5cm With 2 rows of 6 pin Compatible with breadboard, can be directly use in breadboard Usage: For example: High voltage is 5V, low voltage is 3.3V HV connect with 5V power supply LV connect with 3.3V power supply GND connect the power negative pole LVx input/output 3.3V TTL HVx input/output 5V TTL Bi-Directional transform between LVx and TVx Package Includes: 1 x Bi-Directional transform module 2 x rows of pins