Weapon maker Joerg Sprave is always up for a challenge. When the makers of the game War Robots asked him if he’d build a robot, he obliged them with the world’s deadliest vacuum cleaner – which carries and fires a Glock. Never yell at this robot for missing a spot!
Giaco Whatever has an extensive history of making dangerous items. So leave it to him to transform a normally safe kid’s NERF gun into a deadly weapon, thanks to the pressure generated liquid nitrogen expanding inside the gun at room temperature. Kablam at 22:16.
Make: author Caleb Kraft came across this nifty plaything by Mike’s Electric Stuff, which uses sensors and a cylindrical grid of LEDs that simulate falling snow or sand as it’s flipped end-over-end. Mike needs to turn this thing into a toy you can buy. He’d sell thousands.
Got a broken washing machine and some woodworking skills? Then check out Scrap Wood City’s clip in which he shows how to convert the metal tub from a washing machine into the body for a fretless acoustic contrabass. It’s only got two strings, but it still sounds cool.
A while back, The Backyard Scientist built a massive mousetrap and used it to smash things. He decided to take all of the energy stored up in that giant spring and use it to drive an axle. Unfortunately, it seems as if its power should be measured in mousepower, not horsepower.
YouTuber Roadie fabricated a nifty motorized skateboarding rig that allows its rider to glide efforlessly (if not exactly quickly) along railroad tracks. Needless to say, don’t try this idea at home unless you’re 100% certain the rails are abandoned like the ones shown here.
MadGyver shows off a fun little project – an Arduino-based glove which can detect gestures, and uses the inputs to control the speed of a strobe light, which when aimed a moving object makes it look like it controls the speed and direction of time. Build details on Instructables.
One of the more entertaining robotic groups we’ve heard was built by FT Mechatronics, whose electronic band consists of a variety of stepper motors, solenoids, hard drives, oscilloscopes, a robot xylophone, nixie tubes, and a tesla coil. Here, it plays Hello by OMFG.
Instructables contributor Mikeasaurus shows off his ridiculously dangerous looking creation, a skateboard which leaves a fiery trail in its wake. It drips out a small amount of fuel triggered by a foot-controlled switch, and ignites it with an electric sparker. Full build log here.
Future Interfaces Group shows off Electrick, an intriguing way to convert virtually any sort of object into a touch-sensitive surface using conductive materials or sprays, and connecting an array of electrodes. It’s not as precise as a touchscreen, but it can sense X/Y positions.
Turns off you don’t need to be the US Navy to build a railgun. YouTuber Ziggy Zee shows off his backyard railgun, which he mounted to an old RoboteX remote-controlled platform. This killer beast fires up to 35,000 joules of electricity, laying to waste anything in its path.
Backyard engineer Peter Sripol turned a NERF rifle into a souped-up airsoft gun with a fairly large barrel. Then he loaded the gun with all sorts of improvised projectiles, such as AA batteries, 6″ nails, and fireworks. This guy’s going to be just fine in the apocalypse.
Peter Sripol and his pals like to fly r/c airplanes, but he tried something a bit different for his latest flyer by building a plane that uses two spinning KFC buckets to get airborne, courtesy of the Magnus Effect. Flight KFC185 hits the skies around the 11-minute mark.
Oliver Wilshen and Niall Quinn aka Signal-to-Noise modded an old Roland DXY pen plotter, covering its bed with strips of magnetic tape, and replacing its pen with a playback head. The result – a strange device that can play back bits of audio based on x/y coordinates.