The Arduino Sensor Shield allows you to connect various modules such as sensors, servos, relays, buttons, potentiometers, etc. on your Arduino Uno. Each pin has a corresponding VCC and GND pin to easily connect a module and power it.
External support
An extremely useful future is that this shield accepts external power for power-demanding devices, such as servos and motors. Next to the power input is a jumper used to choose between internal power (from your Arduino) and external power.
technical specifications
PIN13 LED Driver
Digital I/O ports D0-D13
Analog IO ports A0-A5
Reset button
Power in
Power LED
LCD Parallel Interface
LCD serial interface
UART interface
SD interface
Bluetooth interface