5 Pieces 4 Channel Bidirectional Logic Level Shift Converter 3.3V-5V This is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V simultaneously It allows you to set high and low voltages and perform safe level shifting in both directions on the same channel Converts 4 pins on the high side to 4 pins on the low side, with two inputs and two outputs provided for each side Features 4-channel bidirectional logic level shifting between high and low logic levels Compatible with breadboard, can be directly used in breadboard applications Specifications: High voltage example: 5V, low voltage example: 3.3V HV connects to 5V power supply LV connects to 3.3V power supply GND connects to power ground LVx: input/output for 3.3V TTL HVx: input/output for 5V TTL Bidirectional conversion between LVx and HVx Compact module size: 1.3cm x 1.5cm Equipped with 2 rows of 6 pins Also compatible with 2.8V and 1.8V devices Connect high voltage (e.g., 5V) to the HV pin and low voltage (e.g., 3.3V) to the LV pin