They are launching version 3 of their LittleArm robotic arm, and the progression from version 1 is an interesting study in simplification and parts count reduction without sacrificing functionality.

The team calls the robot arm Mantis, and it was designed to offer a lightweight, affordable, and accessible haptic force feedback device. Haptic feedback aims to simulate the sense of touch.

Using servos and aluminium mounting hardware purchased from eBay, [Stanley] build a simple robot arm. He then hooked an HMC5883L magnetometer to the robotic arm.