RasPiO® Duino Arduino Compatible Add on Board for the Raspberry Pi...

RasPiO-Duino-Arduino-Compatible-Add-on-Board-for-the-Raspberry-Pi-3-3B-Zero-RasPiO-Duino-The-RasPiO-Duino-is-a-small-plug-on-board-that-has-functionality-similar-to-that-of-an-Arduino-but-is-programmable-from-the-Raspberry-Pi-Once-it-has-been-programmed-it-can-be-removed-from-the-Pi-and-used-on-its-own-or-can-be-used-interactively-with-the-Pi-There-is-a-72-point-prototyping-area-and-the-Pi-s-GPIO-ports-are-also-broken-out-onto-the-Duino-br-br-All-the-ports-on-the-Duino-are-cle

Price: 2.74 from Rapid Online Rapid Electronics Ltd.