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This person made the world's smallest Arduino board—it fits on your fingertip

The Moddo Pinch could fit into your tiniest DIY projects.
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Multiple Shift-out Registers on Arduino – part 1

Shift-out: again? Yes, shift-out registers again, now daisy-chained! But let me write down a short foreword. As probably occurs for most of the subjects, especially those related to the Arduino board, ...