Many RTC modules are designed to operate at 5V, the Raspberry Pi operates at 3.3V; this is where this practical module comes in. It operates at 3.3 V, which is perfect for adding an RTC to your Raspberry Pi. Features: Direct connection to the GPIO header Miniature size Operating voltage of 3.3V I2C Pinout interface (the square solder pad is pin 1): VCC SDA SCL North Carolina GND
