[Romado12187] just posted a walkthrough of his mechanical dry erase board project on Instructables. It was on display in the Microsoft booth last weekend at Maker Faire. Unlike [sprite_tm]’s version we covered earlier, this one is built more like a traditional pin plotter. The construction was done entirely in [Romado12187]’s dorm room and uses plywood and PVC pipes for the majority of the frame. The mechanical components were purchased from SDP/SI and the controller hardware are Phidgets. He included a joystick, but it also has a C# command line program for control. [Romado12187]’s write up also has a lot of improvements to help make your first attempt better than his; buying a premounted board and being very exact in calculating motor power are recommended. Catch a video of the plotter in action after the jump.
Month: May 2008
Hack Your Prius With Prius Batteries

Adding extra battery capacity to hybrids is becoming pretty common, but this one is better than the average lead acid trunk fest. The pack was built from three prius NiMH packs picked up from salvage yards. These batteries can’t simply be bolted together, but with some research and effort you can save some nickel from the junk yards and cut your fuel bill.
Maker Faire 2008: Electric Motorcycles

Builder [Justin Gray] brought a pair of electric motorcycles to Maker Faire last weekend. Pictured above is the R84, which has 28 LiFePo cells and an 84v AC induction drive providing 54HP. All of that is stuffed in a 2000 Yamaha R1 frame. You can buy it now for $14,000.
GPL Vs. Skype Back In Court

UPDATE: Skype has withdrawn their appeal and accepted the original judgment.
Tomorrow the High District Court of Munich will hear Skype argue against the validity of the GPL. Last June, the court issued an injunction against Skype for selling the SMC WSKP 100, a Linux-based WiFi VoIP phone. After the initial GPL violation, a flier with the URL for the source was added to the package. The GPL wasn’t provided and the court found this insufficient for fulfilling the requirements of the GPL. Skype is appealing and claims that the GPL as a whole violates anti-trust regulation. The case against Skype was brought by OpenMoko‘s original system architect, Harald Welte, as part of his work for gpl-violations.org.
Teach Your Robots To Cook

The nitty gritty details are a little bit hidden, but [Sylvain]’s work is awesome enough that I just don’t care. He’s been doing research on robot learning with some tasty results. After all, who doesn’t want a robot to make breakfast for em? He’s taken the time to publish some source code, so robot made breakfast isn’t that far out of reach. mmmm.
Maker Faire 2008: SWARM

SWARM is a large scale kinetic art project. The electrically powered spheres move by shifting the batteries around the center axle. By tilting the central ring, th orb can steer as well. The SWARM members are currently radio controlled, but the plan is for them to eventually receive commands from a mother node. More information about the orbs’ design is available on the project wiki. A video of the wobbly buggers in motion is embedded after the break.
Maker Faire 2008: Stribe Music Controller

We saw a lot of interesting gear at Maker Faire last weekend and thought we’d highlight some of those projects this week. [Josh Boughey]’s Stribe was originally inspired by the monome 40h. It features of 16 columns of 64 LEDs for a total of 1024 individually addressable lights. Even with all those LEDs, PWM control means it can run off of USB power. 8 spectrasymbol softpots are used between the columns for user input. It’s really quite an amazing feat for being [josh]’s first board design. All of the circuit designs and firmware are available. Check out Flickr for more photos from this weekend.
