Browse 506 open source reference designs tagged "i2c", including schematics, PCB layouts, and bills of materials sourced from public GitHub repositories.
Minimal adapter board for converting keyboard i2c oled pins to ffc/fpc ribbon cable for keyboards such as crkbd or kyria
Open-source hardware and software for a satellite with a custom on-board computer to interface over I2C, SPI, and UART with a flash chip, IMU, barometer, camera, and thermal sensors. Built to fit within a 1U form factor.
Digital watch using the ATtiny85 MCU. The MCU communicates with DS1307 real-time-clock (RTC) over I2C. Also used TM1637 for displaying the clock.