• en Static electricity could charge our electronics.

  • Unhappy with the life of your smartphone battery? Thought so. Help could be on the way from one of the most common, yet poorly understood, forms of power generation: static electricity.


    (Image credit: Schlueter/Getty)

    “Nearly everyone has zapped their finger on a doorknob or seen child’s hair stick to a balloon. To incorporate this energy into our electronics, we must better understand the driving forces behind it,” says James Chen, PhD, assistant professor in the Department of Mechanical and Aerospace Engineering in the School of Engineering and Applied Sciences at the University at Buffalo.

    Chen is a co-author of a study in the December issue of the Journal of Electrostatics that suggests the cause of this hair-raising phenomenon is tiny structural changes that occur at the surface of materials when they come into contact with each other.

    The finding could ultimately help technology companies create more sustainable and longer-lasting power sources for small electronic devices.

    Supported by a $400,000 National Science Foundation grant, Chen and Zayd Leseman, PhD, associate professor of mechanical and nuclear engineering at Kansas State University, are conducting research on the triboelectric effect, a phenomenon wherein one material becomes electrically charged after it contacts a different material through friction.

    The triboelectric effect has been known since ancient times, but the tools for understanding and applying it have only become available recently due to the advent of nanotechnology.

    “The idea our study presents directly answers this ancient mystery, and it has the potential to unify the existing theory. The numerical results are consistent with the published experimental observations,” says Chen.

    The research Chen and Leseman conduct is a mix of disciplines, including contact mechanics, solid mechanics, materials science, electrical engineering and manufacturing. With computer models and physical experiments, they are engineering triboelectric nanogenerators (TENGs), which are capable of controlling and harvesting static electricity.

    “The friction between your fingers and your smartphone screen. The friction between your wrist and smartwatch. Even the friction between your shoe and the ground. These are great potential sources of energy that we can to tap into,” Chen says. “Ultimately, this research can increase our economic security and help society by reducing our need for conventional sources of power.”

    As part of the grant, Chen has worked with UB undergraduate students, as well as high school students at the Health Sciences Charter School in Buffalo, to promote science, technology, engineering and math (STEM) education.

    Source: http://www.buffalo.edu/news/releases/2019/01/024.html

    #Sustainability #Engineering #Science #World #Future

    5 on April 25, 2019

    Cool item! Unfortunately a hand crank won’t generate enough energy to charge a phone or other devices, also I think it isn’t “healthy” for a battery to get charged with this process since energy value input is not the same at every moment. Perhaps the solenoid engine should be more efficient and smaller.

    But I am sure science will figure out a way to make more use of the “triboelectric effect” in the near future. Also with all of the wifi / wlan signals in our enviroment it should be interesting to harvest electricity with new materials. It made me chuckle when I read in the listing that they “do not ship to Germany”!

    on April 28, 2019

    Of course I remember, I’ve had to use my grandfather’s bicycle (similar to the one pictured) quite often during primary school when the bus didn’t came or when the weather was good. But yes, the dynamo engine radiates some special kind of light! It was enjoyable to the eyes.

    on April 28, 2019

    I still love that warm yellow light 

    on April 28, 2019

    do you remember the dynamo light on the bicycles? it was the only option we had when I was a kid

    Find many great new & used options and get the best deals for Vintage Miller Bicycle Generator Head Light Taillight Chrome Britain Free Ship at the best online prices at eBay! Free shipping for many products!

     

    on April 27, 2019

    There are some great ideas out there and I do think hand crank engines, or push generators have still some potential.

    New Sacramento gym turns to people power

    on April 25, 2019

    there are cheap outdoor radios and flashlights with built-in crank, or push generator. and they have the right circuits to regulate the constant current and voltage.

    Static electricity is a great idea but it will take a while to achieve the performance

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    0 on April 25, 2019

    this one is tempting

    Hand crank, 60V, 20Hz, box marked Vers. 5805-12-130-7804 1 Stuck Kurbelinduktor”. ( Kurbelinduktor ) Field Phone Hand Generator. They feature a folding crank handle. Original German Army. Make sure you follow these guidelines.

     

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  • Still in early days, Blockchain is rich with possibility.

  • Digital security expert Dan Boneh offers a primer on blockchain, the much-talked-about foundation for Bitcoin and other next-gen apps. While cryptocurrencies Bitcoin and Ethereum gather the lion’s share of headlines, few know that these “killer apps” are just the first generation of products based on a relatively new ledger-like technology called blockchain.

    Founder of the Center for Blockchain Research at Stanford, Dan Boneh says that blockchain is generating a swell of excitement among coders and computer scientists not witnessed since the earliest days of the internet. While the true killer apps are still to come, Boneh says it is never too early to contemplate what blockchain is, where things might be headed and what the consequences might be on a personal, financial and societal level.

    From cryptokitties to mining bitcoin, host Russ Altman and guest cybersecurity expert Dan Boneh explore the state of blockchain as we know it. You can listen to their “Future of Everything” podcast here: https://soundcloud.com/user-458541487/blockchain-and-cryptocurrency-with-guest-dan-boneh

    #IoT #Security #Future #Blockchain #Industry

    0 on March 16, 2019

    it’s more about sharing and verifying the data. I believe it will be a common tech pretty soon. maybe already is

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