Category Archives: biology

Cat Robot’s Secret to Slim Legs? Banish the Motors!

The first thing to notice about [Bijuo]’s cat-sized quadruped robot designs (link is in Korean, Google translation here) is how slim and sleek the legs are. That’s because unlike most legged robots, the limbs themselves don’t contain any motors. Instead, the motors are in the main body, with one driving a half-circle pulley while another moves the limb as a whole. Power is transferred by a cable acting as a tendon and is offset by spring tension in the joints. The result is light, slim legs that lift and move in a remarkable gait.

[Bijuo] credits the Cheetah_Cub project as …read more

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Posted in 3d printed, arduino, Arduino Hacks, bio robot, biology, cat, cat robot, cheetah, cheetah_cub, gait, motors, pulley, robotics, robots hacks, serval | Leave a comment

Micro-Organisms Give Up the Volts in this Biological Battery

Battery cells work by chemical reactions, and the fascinating Hybrid Microbial Fuel Cell design by [Josh Starnes] is no different. True, batteries don’t normally contain life, but the process coughs up useful electrons all the same; 1.7 V per cell in [Josh]’s design, to be precise. His proof of concept consists of eight cells in parallel, enough to give his cell phone a charge via a DC-DC boost converter. He says it’s not known how long this can be expected to last before the voltage drops to an unusable level, but it works!

There are two complementary sides to …read more

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Posted in 2018 Hackaday Prize, 3d printed, battery, biology, Chemistry, chemistry hacks, fuel cell, green hacks, photosynthesis, phytoplankton, plankton, The Hackaday Prize | Leave a comment