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Jens Frank
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Viel Erfolg allen Läufern!
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Die in der Show schon häufiger angesprochene YN360 ist jetzt beim Sponsor zu bestellen. Auf der Suche nach Anwendungsbeispielen bin ich aber bisher gescheitert. Auf Flickr gibt es ein paar wenige mit YN360 getaggte Bilder, aber dort wird die Leuchte nur zum Lightpainting genutzt. Hat jemand schon Bilder gesehen, die mit der Leuchte ausgeleuchtet wurden?

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Winter kommt in die Stadt
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OpenAir in Frankfurt Griesheim - #trotzwetter #livinglegends
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Militärhistorische Sammlung, Tornado, F18.
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25.07.15
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Eichwäldchenfest , Stadtteilverbesserung
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+Niele Popiele#lostscrunchies
Von meiner Nichte, die gerade in Australien unterwegs ist
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Elon Musk introduced the Tesla Powerwall and the larger Tesla Powerpack yesterday, suggesting that it's possible to power the world using batteries. But is there enough Lithium for the 2 billion Powerpacks that are needed to do this?

Musk actually didn't say that Tesla is using Lithium for the Powerpack, but it's a safe assumption. If Tesla would have invented anything better, they would have told.

Literature says that a battery has about 0.3g of Lithium per Ah. The 100 kWh Powerpack has 27'777 Ah (a Lithium-ion cell has 3.6V). With 0.3g/Ah this is 8.3kg of Lithium per Powerpack. That's 16.7 million  tons of Lithium for 2 billion Powerpacks.

The U.S. Geological Survey estimates the world's reserve on Lithium to be about 13.5 million tons.

To answer Elon Musk's question "Is this within the abilities of humanity to do?": No, it's not. 
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