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The Arduino has been used for many purposes, and “shields” are available to make many common tasks easier. However, [Nick] wanted a stackable motor driver shield, so he build one himself!.

A new Arduino compatible audio development board will soon be launching via the Crowd Supply website offering an open source design for audio and digital signal processing (DSP) applications.

OMC has launched a fibre optic transceiver shield for Arduino Uno, designed to work with PMMA (polymer) optical cables up to 25m long, plus demonstration software ...

are only loosely related to the 0V and 5V on the Arduino. Opto-isolation is the obvious answer (until TI’s non-opto-isolators are easier to get) to remove ground voltage variations, and that got me ...