SwitchDoc Labs Quad Power Management (QPM) I2C Board for Raspberry Pi and Arduino Quad Power Management I2C Board - Switch on and off batteries, power supplies and solar panels Supports Arduino (5.0V I2C) and Raspberry Pi (3.3V I2C). Each channel can be switched independently I2C Control with a bonus of 4 additional GPIO Pins (either 5V or 3.3V) Software drivers provided for Arduino and Raspberry Pi Full Documentation and Software for Raspberry Pi and Arduino on www.switchdoc.com