[ladyada] ran acrossthis excellent hack by [phillip]. Apparently there's a clock, data, 5v and ground connection available in most modern video connections. (He even notes HDMI cable pins) He wrote some drivers and can now control i2c hardware directly from the PC Mac. [Ladyada] notes that most laptops use an i2c bus for extra sensors as well. For now, the code only works on Mac OS X.
We haven't made a regular habit of watching BoingBoing TV, but lately they've been covering topics we've been interested in... not the dolphin pr0n. In yesterday's episode they talked to Jacob Applebaum from the EFF about the cold boot encryption attack. The attack involves dumping the contents of memory to a storage device by power cycling the system. Cooling the memory chip with compressed air helps preserve the integrity of the data. The attacker can then search the data to find encryption keys protecting the contents of the hard drive. A fool proof solution to mitigate this attack hasn't been developed yet. You can read more about cold boot attacks at the Center for Information Technology Policy. The BoingBoing TV episode, bizarre editing and all, can be downloaded directly here.
Charter Communications seems to be pulling some sort of crap with their DNS servers. While working on a new project our friend Billy Hoffman, discovered that Charter was reporting absolutely every domain as resolving. They do offer a solution by providing an opt-out cookie, which isn't useful at all if you're not using a web browser... and I'm guessing most of Charter's subscribers aren't looking for a bastardized version of the net. We've seen recently that messing with DNS like this can actually open up new security holes.
[Jared] sent in this optical tachometer by [Mike Freeman]. The write-up and code requires a free registration, but if you've got a use for it, it's probably worth the hassle. The zip archive includes a nice writeup in PDF format, and the code needed for the pic controller. The tach was built specifically for model helicopters. The user looks through the viewfinder and adjusts the pot on the side until the spinning helicopter blade visually stops turning.
Yes, even we were getting tired of that Indiana Jones marathon on TV. So, we ventured online to find something entirely too geeky for a Sunday afternoon. The Future of the Internet and How to Stop It is a presentation Harvard Law School professor Jonathan Zittrain gave at Princeton near the end of March.
He begins by covering early 20th century "sterile" technology like tabulation machines that were rented by the census bureau. The machines didn't encourage any sort of innovation. Next he talks about "generative" technology like the internet and modern OSes where anyone can build whatever they want. The final step is the more recent move to what he calls "tethered" technology. These are the systems with upgradeable firmware where devices can ship with unfinished features and remove features after the consumer has already purchased the device. He uses the iPhone as an example of this walled garden that could hurt innovation. Watch the video for his thoughts on this new world and how he thinks it could be fixed.
[Pziz] wrote in with one of his projects. He created a linux kernel driver for the PIC 18F*55* series based on some available development tools. Continue reading for his (slightly edited) writeup.
A Dynomometer measures actual horsepower and torque output at the wheels of a vehicle. Aside from racing, it's long been the way to test out engine modifications. [Steve] built his own. It uses a Basic stamp for data acquistion, and a custom machined drum for the physical interface.
Been looking for some extra range for your R/C projects? [Tron]'s managed to control his planes from 9.8Km using this kit at 868Mhz. I don't know if I'd have the patience to fly the plane for that long, but this beats the pants off of just about everyone else home R/C gear.
[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.
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.
I was starting to wonder when [Bruce] would send in this years final projects from the Electrical and Computer Engineering students at Cornell University. The first project looks like a great one for the green geek - a controllable power usage monitoring power outlet. The music geeks should dig midi trumpet interface, but the car geeks might have problems keeping away from the soldering iron after they see the CAN bus SD card data acquisition system. There are plenty more, so go check em out.
[sudija] wrote up a nice instructable on adding bluetooth audio output to a tomtom gps unit. It's not too technically advanced, but you'll have to add an audio jack if your gps lacks one. This looks like a great way to turn a cheaper unit into something suitable for a motorcycle rig.
[Ned] sent in his USB temperature sensor. This little guy has a PIC controller, FTDI usb serial interface and a dallas temperature sensor. He managed to keep the cost very low - including the PCB.
Despite the resemblance to an alien robot that might rebuild your house from scratch, this is actually the first mod for a solar yard lamp that I've seen. By adding a brighter LED, a couple of tubes, a laser printed transparency and a lens, you end with with a relatively inexpensive image projector that can project custom graphics from odd locations. [via]
[Ryan] sent in [Bill]'s project to build his own JAMMA arcade game console. It's actually a take off from one of [Ben Heck]'s how-tos, but I thought it might interest people who think that they can't pull off any of the projects we feature on their own. We definitely like to show off some original, complex hacks, but success stories can be just as inspiring.
