Friday I want a Ball Pit Extra


[rmunroe] of the notorious xkcd made his own ball pit. I’m now completely, totally jealous.

[-] sent in this Commadore 64 Guitar Hero project.

[Jock] sent in this uh, marriage of a Wiimote and a rocking horse. It’s actually a great idea if you’ve got a kid and some duct tape handy.

[warthox] sent in this XBox 360 tilt controller project. These have been popping up a bit, but you might like this one. The board is all surface mount, and was routed to make the prototype. I kind-of like the surface pads that were used to mount the wires to avoid doing thru hole mounts.

We’ve been digging the EeePC – [Paul] wrote up his tricks to get Ubuntu working on the thing.

[Jock] sent in this huge set of music hacks. Mostly circuit bent, but they make for interesting reading.

DIY SCUBA tank boost pump (for mixing gases)


No love for that sweet old NES controller? Fine, here’s a bonus hack for you. This home-built boost pump is designed to take in a volume of gas (like oxygen) and compress it with a hydraulic style air powered cylinder to raise the pressure. With the increased pressure, the O2 can be added to a SCUBA tank that contains high pressure air to create what’s known as NITROX. The idea is to increase the percentage of Oxygen in order to reduce Nitrogen absorbtion in the blood – increasing a divers safe time at depth underwater.
The compression cylinder is built entirely of brass with Sirvon seals. The drive cylinder and 2:1 lever produces 3,000 lbs of pressure on the pump cylinder, all from 120psi of pressure from a standard shop air compressor.

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