electromagnetic harvesting device by dennis siegel
electromagnetic harvesting device by dennis siegel electromagnetic harvesting device by dennis siegel
jan 14, 2013

electromagnetic harvesting device by dennis siegel

‘electromagnetic harvesting device’ by dennis siegeldetecting electromagnetic fields with higher frequencies



the omnipresence of electromagnetic fields is implied just by simple current flow. we are surrounded by electric charges which are produced for information transfer or as a byproduct. being capacitive, these fields can be harvested with coils and high frequency diodes.


in response, bremen-based designer dennis siegel built special devices that are able to tap into several electromagnetic fields to exploit them, where the energy is stored in typical batteries. users can then retain the charges from the power supply of a coffee machine, a cell phone or the catenary of a train by holding the harvester directly into the electromagnetic field whose strength is indicated by a LED on the top of the object.




harvesting the electromagnetic field of the cell phone



there are two types of devices for different electromagnetic fields: a smaller harvester that is suitable for lower frequencies below 100Hz which can be found in the general mains (50/60Hz, 16,7Hz) and a larger variation that is suitable for lower and higher frequencies like radio broadcast (~100MHz), GSM (900/1800MHz) up to bluetooth and WLAN (2,4GHz).



 ‘electromagnetic harvesting’



detecting the electromagnetic field of a power line


harvesting the electromagnetic field of a ticket validator


harvesting the electromagnetic field of a coffee machine


harvesting the electromagnetic field of a copy machine


farming at a substation


the smaller harvester


the larger harvester



designboom has received this project from our ‘DIY submissions‘ feature, where we welcome our readers to submit their own work for publication. see more project submissions from our readers here

  • I am curious about how long it would take to charge a standard AA battery using this device..

    morgan says:
  • It takes around 24 hours to charge a standard AA battery, found this out by going onto his website and reading his post about this.

    Rowdy says:
  • where to buy? how much?

    cody says:
  • Siegel must know about the conservation of energy. If he really wants to “harvest” electricity from power lines, he should just connect wires to them. It is no worse than pulling down the fields, increasing losses in the lines. It’s actually even worse to use his “harvester” due to conversion losses in his device. Do you really want a nearby stranger powering their inefficient battery charger with your cellphone battery?

    Bob says:
  • I want a harvester…can I make one or can I buy one?

    jean says:
  • this technology can be used ito charge mobile phones. He will be the richest guy in the world.

    adam says:
  • Max power? 0.1mA? 🙂

    elec says:
  • How to Make It ? Can you tell me?

    Nabeel Ahmed Farooqui says:
  • gimme gimme

    your mum says:

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