Characteristics:
1. Four MOS tubes realize bidirectional conversion of four 3V and 5V levels.
2. The power input has reverse polarity protection, integrates 3.3VLDO and can supply external current not more than 150mA.
3. With the operation indicator light, it is clear at a glance whether it is working or not.
4. Can realize bidirectional conversion of 3V-5V level of UART, IIC, 1-wire, SPI and other bus signals.

How to use it:
1.The level converter is very easy to use.
2.This small bidirectional logic level converter can safely reduce 5V to 3.3V and also boost 3.3V to 5V.
4.It must be powered from two voltage sources (high voltage and low voltage) that your system uses. Take the high voltage (5V) and the low voltage (3.3V) for example.

5V is connected to the HV pin;
3.3V is connected to the HV pin;
Ground from the system connects to the GND pin.

5.You can successfully adjust your high and low voltages and switch back and forth between them safely on the same channel. Each level converter is capable of converting 4 pins on the high side to 4 pins on the low side, with two inputs and two outputs for each side.

Package include:
15 x 4 Channel I2C Logic Level Converter Bi-Directional Module
30 x 6Pin Single Line Pin Header