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Power generating backpack is a gift from the gadget gods, Uncle Sam
Without a doubt, the military is home to some of the best gadgets. Fortunately for us, the non-lethal stuff often makes it into the hands of consumers after companies finish milking the government of its R&D budget. Case in point: this electricity-generating backup. Designed for the military, the kinetic energy pack is suspended on a rail that generates electricity as you walk. The power generated will charge a standard US Marine-issue lithium ion battery pack or can be directly routed to whatever device you want to charge. The obvious benefit would be limitless power in the field freeing troops from carrying extra batteries on long missions. A power meter on the shoulder strap lets you monitor performance while a three-stage resistance device lets you regulate the power output. A braking mechanism lets you lock down the pack when you want to keep the pack steady. Otherwise, it looks like it'll generate about 8 watts of power while walking or 44 watts of power when running. Do want. See it in action after the break. [Via besportier]
Sanyo builds prototype pedometer that powers itself while you walk
These portable power generating options are a dime a dozen now, but we thought you'd still want to know that Sanyo has invented a device that'll let you turn your health obsession into electricity to power your health obsession -- a vicious cycle if we've ever seen one. It's a pedometer that generates just enough energy (40 microwatts) to keep itself ticking when the swinging motion of its health-nut wearer's body causes tiny parts to move around. Sanyo hopes to use the technology for other low-power devices in the future. As for us, we'd rather remain utterly otiose and let our battery slaves do the work for us, though we can imagine something like this might, with some improvements, prove useful to those villagers who have to walk 12 miles to charge their cell phones. [Warning: read link requires subscription]
Electricity-generating knee brace fails the American Dream
Some researchers at the University of Michigan are clearly misdirected in their goals to harvest energy from a knee brace. The device generates electricity in a method similar to regenerative breaking in a hybrid car, so the attempt is to harvest wasted kinetic energy in your knee from when your leg hits the ground and at other points in your stride. Hopes are to reclaim this energy for use to power gadgetry on your person, or perhaps a prosthetic limb, and the researchers claim it only takes an extra watt of metabolic power for each watt of electricity generated -- compared to 6.4 watts of metabolic for a hand-crank, for instance -- but we'd say that's still one watt too many: if we were meant to use our own calories to power devices, why did God make batteries and solar panels?
