The CJMCU 4 Channel Bidirectional I2C Logic Level Converter is a compact module that safely translates I2C signals between devices operating at different logic voltages. It supports 5V to 3.3V, and can also accommodate 1.8V and 2.8V devices, providing flexible power conversion on demand. Each channel provides bidirectional voltage translation, allowing the same SDA and SCL lines to switch between voltage domains automatically. Four side to four low side channels for multiple I2C devices Simple to use: power from your system HV and LV supplies (for example 5V to HV and 3.3V to LV) Safe interfacing that protects devices from voltage mismatch Compact, breadboardfriendly form factor suitable for hobby and embedded projects Broad compatibility with common I2C sensors, EEPROMs, displays, and microcontrollers Usage tips: Connect HV to the higher voltage supply and LV to the lower voltage supply to suit your system Use for sensors and peripherals that operate at 1.8V, 2.8V, 3.3V, or 5V on the same I2C bus Use scenarios: Read a 3.3V I2C sensor with a 5V Arduino or microcontroller Integrate a 1.8V or 2.8V peripheral into a 5V I2C bus Add multiple I2C devices such as OLED displays or memory chips on a single 4channel bus