Hobbyist builds wrist-mounted, laser-sighted crossbow
A lot of people think crossbows are pretty cool. Lasers, miniaturized things, and wearable devices also tend to rate pretty high on the neat-o-meter. It goes to follow, therefore, that a small wrist-mounted laser-sighted crossbow should have a lot of admirers. Well, laser hobbyist Patrick Priebe built just such a device, and his video of it in action has already racked up over 100,000 hits in just
Ultrasensitive underwater microphone inspired by orca ears
Stanford researcher Onur Kilic, who was the lead author on a paper describing the orca-inspired hydrophone (Photo: L.A. Cicero) Given how poorly light and radio signals are able to travel underwater, sound is still the best medium for wireless undersea communications. Conventional underwater microphones - or hydrophones - have their limitations, however. One of their main problems is that the deep
The use-once flying video camera
The Firefly is a new disposable camera fired from a grenade launcher designed for those unfortunate moments a soldier encounters once in a while when you need to see what’s ahead, but don’t have a UAV to tell you. The Firefly is a miniature projectile weighing 145g and launched from a standard-issue M203 grenade launcher attached to an M16 assault rifle. It’s a use-once video camera with a life-sp
Your own helicopter for under US$20,000
September 21, 2005 Flying is not a sport generally associated with those people who are light of wallet – which makes the Mosquito Ultralight helicopter something of a rarity. The entire kit for the Mosquito can be purchased for US$20,000 and if you think the minimalist Mosquito leaves you a bit vulnerable, there’s the fully enclosed Mosquito XE and XEL which can be purchased for US$23,000 apeice.
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