The DFR0828 is a module made by DF Robot with universal expander capabilities. It measures 65x65mm, and is used to expand I/O interfaces. It supports various I/O interfaces such as 8 digital IO, 8 analog IO, 8 PWM channels, 4 I2C ports, 4 30V high-power outputs, 4 logical IO, 1 serial port, and 1 CAN2.0 port. Additionally, the DFR0828 module is compatible with Arduino Uno and other microcontrollers, and has an on-board voltage reference circuit for better accuracy. The module also supports the function of current monitoring and overvoltage protection, allowing a variety of applications such as controlling motors, sensors, relays, LED drivers, and more.