The Arduino Prototyping Shield makes it easy for you to design custom circuits for your next Arduino project._x000d_You can solder parts to the prototyping area to create your project, or use it with a small solderless breadboard (not included) to quickly test circuit ideas without having to solder. It’s got extra connections for all of the Arduino I/O pins, and it’s got space to mount through-hole and surface mount integrated circuits if you need to as well. It’s a convenient way to make your custom circuit and Arduino into a single module._x000d_Hundreds of thousands of Arduino boards are already fueling people’s creativity all over the world, everyday. Join us now, Arduino is you!_x000d_Summary Requires and Arduino board (not included) Arduino 1.0 pinout Large 0.1″ prototyping area Reset button 14 pin SMD footprint (50 mils pitch) 20 pin Trough Hole footprint (100 mils pitch) SPI header long and easy-to-solder ground / 5V rails The 1.0 standard pinout consist in 4 additional pins: 2 of them placed near the AREF pin, that are used for TWI communication, and the other 2 are placed near the RESET pin. The IOREF pin is used to adapt the shield to the board on which is mounted. The last one is not connected and is reserved for future uses.