HOW TO – Build a five foot tall Jacob’s ladder
Here’s a great new Instructable in the Make group on building a five foot tall Jacob’s ladder from Ewilhelm, he writes “This classic climbing arc completes any mad scientist’s dungeon. Don’t touch the electrodes: they’re at 12 kV! Get a neon sign transformer rated for 9 – 12 kV and 30 mA. Make sure it’s an old style, heavy coil transformer and not solid-state. The solid-state transformers won’t start the arc. I got a Transco 12 kV 30 mA transformer on Ebay for $35. It didn’t have a wall plug, so I wired one on.”… Link.
I asked Scott and Bjoern to write up what they’re up to when I saw the challenge of making a functional music player in 30 minutes, they write “d.tools is a hardware and software system that enables designers to rapidly prototype the bits (the form) and the atoms (the interaction model) of physical user interfaces in concert. d.tools was built to support design thinking rather than implementation tinkering. With d.tools, designers place physical controllers (e.g., buttons, sliders), sensors (e.g., accelerometers), and output devices (e.g., LEDs, LCD screens) directly onto form prototypes, and author their behavior visually in our software workbench.” More info and downloads 
Greg Smith’s kids started a company that makes costumes for Roombas. The company is “myRoomBud” and they’re currently selling a few different variety of Roomba skins. Mooba Cow, Roor the Tiger, Zeb the Zebra and Spotty the Leopard. They’re motto is “If you don’t dress up your Roomba, it’s just a naked vacuum.” [
I think Quanta makes Apple’s Powerbook too, I wonder if they made the 
Paolo writes “Here’s a project developed by the Federal Polytechnic School of Lausanne to build insect robots that are able interact with cockroachs communities.” On the site there are photos, videos, PDF schematics and software to download. 
Chris has a great arcade building how to, he writes – “…the cabinet construction was completed in 24 hours, but it took about three months to get around to the last few bits (like decorating the unit), so don’t complain if after one day you don’t get something that looks like the unit on the left! Please browse through the links at the top and bottom of each page. They will cover the construction diary (in blow-by-blow detail), the finishing of the unit together with a shopping list, prices and then information on the PC inside the unit. Finally you will be able to download some plans we created after building the device, together with some of the graphics that are on the unit.” Thanks Rick! 
Rob writes “One of my co-workers and his brother are somewhat serious about their Christmas lights. They welcomed the introduction of LED lights, because it meant that they could stop adding new electrical panels to their house. Of particular interest to MAKE readers are the technical notes on the sidebar of their site.”