It’s an Arduino shield that adds a Linux SoC, WiFi, Ethernet, and USB Host to any Arduino board from the Uno, to the Duemilanove and Mega. It is basically identical to the Arduino Yun ...

A new Arduino compatible audio development board ... on a small format breadboard friendly device, and includes audio inputs and audio outputs, a low-noise microphone array, integrated test ...

The ‘under’ in Undershield comes from this shield being mounted underneath the Arduino, unlike every other shield on the planet. Doing so allows use of a standard 0.100″-spaced prototype PCB ...

The Arduino development ... projects. The shield also enables users to adjust graphics according to device orientation or audio commands, and even use computer vision as input.

I just received my RC522 RFID reader and made this simple Arduino access control system that uses the reader, a buzzer for the alarm and a relay shield for the security system. The relay can be used ...