Ever wanted to learn DIY programming on the Arduino, but aren't interested in trawling through stacks of dusty technical manuals? Then pay attention: artist Jody Culkin has produced a paneled primer that explains electrical engineering from Ohms all the way through to building your own dimmer switch. Friendly, informative and most importantly, brief, by the time you've finished it, you'll be dashing down to IKEA to build your own Luxo Jr.