Iron Man Inspired Repulsor Beam Blaster V1.0

Homebrew repulsor beam blaster  that’s designed to produce extremely intense burst of light that can be used to repulse your archnemesis, girlfriend /wife and pet cat.

UPDATE: This hack's featured on  Hack A Day!!, and Gizmodo and Engadget and Slashgear and TechCrunch. Many thanks to the folks there, and to everyone that took the trouble to visit.

WARNING: The build involves high voltage and intense light so please take the necessary precautions. And please be warned that , walking around with one of this strapped to your hand may seriously jeopardize your chances with the opposite sex. 




The repulsor is essentially two circuits that are switched ON/OFF using a DPST switch.

DIY Antenna - Gray Hoverman Antenna For UHF TV Reception

My build of the Single Bay Gray Hoverman UHF TV Antenna (SBGH) for nearby to fringe Over-The-Air (OTA) terrestrial reception range of 0 to 100 km. There are two variants of the SBGH. The one with 6-Pair Collinear Rod Reflectors and in my case here, the one with the Split-Screen Reflector.

Some History

The antenna was originally created by Doyt R. Hoverman, who also did the early work on the Hoverman antenna.

He was granted US patents in 1959 and 1964, which expired in 1979 and 1984 respectively.
In early 2008 the DIY Antenna community started toying with the possibility of experimenting with the old Hoverman antenna design. Aided by computer antenna modeling software and encouragement from fellow antenna enthusiasts, an ad hoc research and development team came together.

The original Hoverman design was reconfigured in many ways resulting in a design that has achieved an extraordinary leap in UHF Television Antenna reception performance that rivals or beat most of today's commercially available UHF Television antennas. The Gray Hoverman Antenna was born.


Split Screen Reflector Single Bay Gray Hoverman Antenna

My wooden framed version, based on the DigitalHome design. With all the material at hand, it took me a good 3 hours to complete.

The schematics, made with SketchUp

My wooden frame Split Screen Reflector SBGH in all it’s glory. Joints are best glued together. Pardon the staple gun joints which will undoubtedly affect the performance of the antenna, albeit marginally.

Steel wire mesh as the screen reflector and solid-core Galvanized Steel antenna element. Wherever possible, glue is used to hold things together, note the watermark traces it leaves on the wood. Use of metal fasteners (nails, screws, staples) should be minimized if not avoided.  

Soldered center feed point 

300 ohm twin lead connection. Attach this to the back of the TV of course.

Split Screen Reflector SBGH Performance Reference

Net Gain of the Full Screen VS Split Screen VS Collinear Rods SBGH. Note the significant Gain between Channel 14 – 54. Source

SBGH PolarPlot-Vsource Exact(SplitScreen)
The front lobe and the symmetrical minor lobes of the antenna (resulting from the center feed point). Source

Will be posting some test results when I could find the time, cheers.