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Current issue

ELEKTRO 3/2019 was released on March 11th 2019. Its digital version will be available on March 11th 2019.

Topic: Amper 2019 – 271 International trade fair for electrical engineering

Main Article
Smart Cities (part 8)

SVĚTLO (Light) 2/2019 was released on March 15th 2019. Its digital version will be available immediately.

Architectural and scenic lighting
The architectural lighting of Bečov nad Teplou castle
Lighting design in a nutshell – Part 41
The analyse of light picture a little more theoretic

Day light
Biggest mistakes in day lighting design of buildings

New robot without motor or batteries

16.05.2018 | Caltech | www.caltech.edu

Engineers at Caltech and ETH Zurich have developed robots capable of self-propulsion without using any motors, servos, or power supply. Instead, these first-of-their-kind devices paddle through water as the material they are constructed from deforms with temperature changes.

The new propulsion system relies on strips of a flexible polymer that is curled when cold and stretches out when warm. The polymer is positioned to activate a switch inside the robot's body, that is in turn attached to a paddle that rows it forward like a rowboat.

New robot without motor or battery

The switch is made from a bistable element, which is a component that can be stable in two distinct geometries. In this case, it is built from strips of an elastic material that, when pushed on by the polymer, snaps from one position to another.

Read more at Caltech

Image Credit: Tian Chen a Osama R. Bilal

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