The article also states that it contains a mini-computer but we recognize that as an Arduino Mega (thanks to Miguel over at Areopago 21 for noticing this first and sending in the tip about it).

[Kevin] uses a relay-triggered pump and a water-level sensor, all running on an Arduino Mega plugged into a 1360-point breadboard. He has a lot of common modules. He uses a LED display plugged ...

Learn how to build a mini CNC drawing machine using Arduino in this simple DIY project. This video guides through the process of creating an easy drawing machine at home, perfect for beginners. From ...