Olimex-PROTO-SHIELD-Arduino-Style-Prototyping-Shield-Olimex-PROTO-SHIELD-The-Olimex-Proto-Shield-is-an-Arduino-footprint-prototyping-board-kit-is-supplied-with-stackable-headers-for-later-installation-Two-buttons-&-two-LEDs-are-already-installed-The-board-has-plated-through-holes-for-the-headers-plus-PTH-&-pads-for-other-components-&-connectors-including-up-to-30-way-1-27mm-0-05in-&-0-65mm-0-025in-smd-ICs-Olimex-PROTO-SHIELD-Arduino-Style-Prototyping-Shield