Logic level converter 4-channel 3.3V 5V Arduino ESP RPi The 4-channel logic level converter module enables seamless communication between systems operating at different voltages 3.3V and 5V. Thanks to two-way transmission, it works well in I2C, SPI, UART and GPIO interfaces, eliminating voltage compatibility problems. The module is compatible with Arduino, Raspberry Pi, ESP32, STM32 and other microcontrollers, making it ideal do integration of sensors, communication modules and peripheral devices operating at different voltage levels. Product Features: Two-way voltage conversion – support for 3.3V and 5V. 4 independent channels – the ability to convert multiple signals simultaneously. Support for I2C, SPI, UART, GPIO interfaces – compatibility with popular buses. Safe connection of systems with different voltages – protection of microcontrollers against damage. Fast data transmission – no delays or interference. Compact design – ideal do IoT projects and DIY electronics. Compatibility with Arduino, Raspberry Pi, ESP32, STM32 and other microprocessor chips. Technical specification: Number of channels: 4 High side voltage (HV): 5V Low side voltage (LV): 3.3V Supported interfaces: I2C, SPI, UART, GPIO Maximum operating frequency: 400kHz (I2C) Connections: HV, LV, GND, 4x TX/RX Module dimensions: 17 x 11 mm Application: Conversion of logical levels 3.3V 5V – cooperation between systems with different voltages. Connecting sensors and peripheral modules – OLED displays, WiFi, Bluetooth, GPS modules. Control of devices at different voltage levels – integration in automation and IoT systems. Support for communication interfaces – signal conversion in I2C, SPI, UART buses. Expansion of projects Arduino, Raspberry Pi, ESP32 – integration of various components without the risk of damage. Connection: LV Low-voltage power supply (3.3V) HV High-voltage power supply (5V) GND Masa TX/RX (HV1–HV4 / HV1–HV4) Signal lines do conversion The module enables easy and safe connection of systems with different voltages, ensuring stable signal transmission without the risk of damage to the microcontroller. Ideal solution do Arduino, Raspberry Pi, ESP32 and IoT!