Little Bird
4 Channel Bi-Directional Level Converter
$4.10
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4-Channel Bi-Directional Logic Level Converter Easily connect devices operating at different voltage levels with this 4-Channel Bi-Directional Logic Level C...
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4-Channel Bi-Directional Logic Level Converter
Easily connect devices operating at different voltage levels with this 4-Channel Bi-Directional Logic Level Converter. Designed for safe and reliable voltage translation, it allows 3.3V and 5V devices to communicate without risking damage to sensitive electronics.
Featuring four BSS138 MOSFETs with onboard 10K pull-up resistors, this compact module supports bi-directional level shifting from as low as 1.8V on the low-voltage side up to 10V on the high-voltage side. While optimised for I2C communication, it also works perfectly with SPI, UART/TTL serial, and many other digital interfaces.
Fully assembled and tested, the board provides four independent converter channels and includes two 6-pin header strips for easy integration into your projects.
Features
- Safely connects 3.3V devices to 5V and higher voltage systems
- Bi-directional voltage translation for both input and output signals
- Operates from 1.8V to 10V
- Four independent level-shifting channels
- Uses 4 × BSS138 MOSFETs with 10K pull-up resistors
- Ideal for I2C, SPI, UART/TTL serial, and other digital interfaces
- Fully assembled and tested PCB
- Compact and easy to integrate into prototypes and finished projects
Package Includes
- 1 × 4-Channel Bi-Directional Logic Level Converter Module
A must-have module for Arduino, Raspberry Pi, ESP32, STM32, and other mixed-voltage electronics projects.
Jargon buster
Plain-language definitions for the technical terms used above.
- ESP32
- ESP32 is a family of low-cost microcontroller chips and modules from Espressif with built-in WiFi and Bluetooth. They support programmable firmware and over-the-air updates, and are commonly programmed with toolchains such as the Arduino core and ESP-IDF.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- STM32
- STM32 is a family of microcontroller chips commonly used in embedded electronics. Knowing a product uses an STM32 can help when looking at firmware updates, pin connections, or low-level serial control options.
- TTL serial
- A simple serial data connection that uses microcontroller logic-level voltages (typically 3.3 V or 5 V) rather than the higher, inverted voltages of computer RS-232. When a device lists TTL serial, it can usually wire straight to a microcontroller's UART pins or to a USB-to-TTL serial adapter, but it needs a level converter before connecting to a true RS-232 port.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
