Arduino breakout and prototyping boards arduino a000077 the arduino prototyping shield rev3 makes it easy to design custom circuits for your next arduino project parts can be soldered to the prototyping area to create a project or it may be used with a small solderless breadboard not included to quickly test circuit ideas without having to solder the board has extra connections for all of the arduino io pins and space to mount through hole and surface mount integrated circuits to pro