Ardupilot: Arduino Based UAV Autopilot


A short while back, [Chris Anderson] released an Arduino based autopilot. It rings in fairly cheap and being open source, you can tweak away. To add more functionality, he’s releasing a dual core version. Thanks to the second processor, it no longer requires an external hardware co-pilot. It uses an on-board GPS and features an ATtiny based fail safe. It’s still under development, but he’s made the design files available.

Another Helping Hand For The Work Bench


We like clever work bench accessories; especially the kind that make our projects that much easier. [rstraugh] put up his version of the ubiquitous helping hands: thirdhand++. The arms are made from modular coolant tubing that’s made for machine tools. With the basic arms in place, he created several attachments – like this PCB holder, a LCD holder, the usual alligator clips and even an oscilloscope probe holder.

External CD-ROM Turned Class A Headphone Amp


[Gio] sent in this slick Class A headphone amp. An old CD-ROM case was gutted to hold the goods. The design is fairly simple. Cost can be kept fairly low although the capacitors can add up if you’re a fanatic about quality. If you’ve ever lost any of your headphone gear to sticky fingers, you know that having it blending in to the background can be a great feature.

Create Your Own HDR Images


Hack-A-Day friend [Nathan] showed us some of his results creating his own High Dynamic Range images. Three normal Low Dynamic Range photos. One is under exposed, one is normal and the third is over exposed to capture the information needed. Then all three are used to create a single HDR image. Technically, the HDR image contains too much information to properly display, but even this limited version looks damn impressive.

You’ll need a tripod, a camera that allows you to adjust your exposure value and a decent CPU to do the processing. (This pic took a couple of minutes to render on a quad core cpu) You can check out the full HDR photo here and one of the original frames here. For the software side, you can use pfstools on the command line or QtpfsGUI for the graphics side – both are free and open source. [Nathan] suggests a camera with bracket mode and a remote shutter release for best results. If you’re all about theory, you can grab a white paper on the process here.

Wide Angle Lens For The ATC2K Video Camera


We just ordered up a new ATC3K video camera from Oregon Scientific for some, uh projects. (No, not our new porn site.) If you’ve got one of the older ATC2K cams, you can mod it a bit to avoid dropping another C-note on the new model. [Carlos] wrote up his mod to remove and replace the original narrow lens with a wide angle fisheye lens. The install requires some significant effort and some case modding – probably not a good idea if the waterproof feature is dear to you.