✍ Use this module to connect two devices of different digital voltage levels that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time.

✍ 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.

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▼ Features
Pinout labeled on modules
I2C signal capable
Breadboard compatible
Convert pins on the high side to pins on the low side or vice versa
Power from two voltage sources (high and low); high voltage goes to the HV pin and low voltage to the LV pin
Input Voltage: 3.3 ~ 5V

Mutual transform between 5V TTL and 3.3V TTL
Four channels of logic and high voltage low voltage logic can two-way transform
Portable and lightness, with 2 rows 6 pin contact pins
Level Converter- 4 ChannelCompatible with the bread plate, can be used directly put on the breadboard
4 Channel Module (great for I2C or SPI) and will work with all microcontrollers, Arduino, Raspberry Pi, Intel Edison, NXP Mbed
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For example High voltage: 5V, low voltage: 3.3V
HV connect 5V power supply
LV connect 3.3V power supply
GND connect negative, two power supply commons
LVx input and output are 3.3V TTL, HVx input and output are 5V TTL, LVx and TVx bidirectional transfers.