Papercraft flash reflector

We never use the flash on our point-and-shoot. It has a way of washing out every image we take. But [Joey] has a different solution to the problem. He shows us how to make a papercraft flash reflector that will still light up your subject without washing out everything in the foreground.

[Joey] is perfectly aware that at first glance it would seem you need to have a reflective forehead for this to work. But the reflector is actually set up to aim the flash toward the ceiling. Since most ceilings are white this will reflect the light back into the room, dispersing it at the same time. His write-up includes a link to a PDF of the pattern. After cutting it out, one side is coated in black electrical tape, the other is left white to reflect the light. The design includes a tab that slides into the hot shoe of his Nikon DSLR to position it in front of the pop-up flash.

FabLab helps the developing world set up long-distance wireless Ethernet

The wooden frame seen above hosts a parabolic reflector making up one side of a wireless network link. This is a Fab Lab project called FabFi which uses common networking hardware to setup long-distance wireless Ethernet connections. It’s a bit hard to tell in the image above, but the reflector focuses radio waves on the antennae of a router we’re quite familiar with, the Linksys WRT54G. It’s held upside-down in an enclosure meant to protect it from the elements. The node above manages to complete a connection spanning 2.41 miles!

One of the core values of the project is to develop hardware that is easy to build with limited resources, then to make that knowledge freely available. Anyone who has the ability to download and print out the 2D design file can build a reflector for themselves. As we’ve seen in other projects, paper stencils and hand tools can handle this job with no need for a laser-cutter (which was used for the prototype). WRT54G routers are inexpensive and the project uses the open source firmware OpenWRT. They can be run from 12VDC power which means a car battery works when mains power is not an option. The system has been running in Afghanistan for two years and hardware failure is still in the low single-digits.

[Thanks das_coach]