Catalog > Internet of Things (IOT) Related Products > More Platforms Uno R3 Extension 328 Protoshield Uno R3 Extension 328 Protoshield with Mini Breadboard CMU ARDU PROTO SHIELD+BREADBOARD PROTOSHIELD PROTOTYPE EXPANSION BOARD WITH MINI BREAD BOARD FOR ARDUINO UNO/ DUEMILANOVE Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview The ProtoShield is prototype expansion board with 2 LEDs and 2 button, which can be used directly and more convenience. All the pins and power have been lead out. It is very suitable for building prototype circuit with Arduino. Features ProtoShield for Arduino DuemilanoveTo build prototype circuitDirectly soldering components on boardConnecting through the mini breadboard