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2 Way Blue:

Name: IIC I2C level conversion module 5-3v system compatible

Model: ICC I2C
Power supply :5V-3V
AVCC connect to 5V system power
ASCL connect to 5V system SCL
ASDA connect to 5V system SDA
AGND connect to 5V system GND
BVCC connect to 3V system power
BSCL connect to 3V system SCL
BSDA connect to 3V systems SDA

BGND connect to 3V system GND
2 Way Red:



2 channels of high-voltage and low-voltage logic logic bidirectional translation
2,2-channel high-voltage logic low voltage logic converted into a one-way conversion
3, the module small, 1.5cm X 1.5cm
4, the module is compatible with the bread plate, can be directly plugged into the breadboard use
Instructions for use: [high voltage is 5V low voltage of 3.3V for example]
HV 5V supply
LV 3.3V power supply connection
GND with negative power, two power commons
RXI input 5v TTL, in RXO 3.3v TTL output
TXI input and output 3.3V TTL, TXO input and output 5V TTL, TXI and TXO bi Huzhuan


4 Way Blue:


If you’ve ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. bi-directional logic level converter is a small device that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time. This level converter also works with 2.8V and 1.8V devices. What really separates this Logic level converter from our previous versions is that you can successfully set your high and low voltages and step up and down between them safely on the same channel. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side.

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.

Dimensions:0.63 x 0.52″ (16.05 x 13.33mm)


  • Schematic
  • Eagle Files
  • Datasheet (BSS138)
  • Hookup Guide
  • GitHub
  • Product Video
8 Way Blue:
Conversion level range: 1.8V-6V

Module size: 28mm X 27.5mm

Instructions:( for example 3.3V, 5V system conversion)VCCA connect to 3.3V power supply
VCCB connected to 5V power supply
GND negative one, two power supply common ground
Ax input 3.3V TTL level,Bx will output 5V TTL level
Ax input 5V TTL level,Bx will output 3.3V TTL level


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