economia urbana


How to build an electric telegraph in the wilderness, using nothing modern except information. by elisaltarina
enero 31, 2012, 9:04 pm
Filed under: Uncategorized

Via Scoop.itAgronautas

Immaculate Telegraphy was an experiment to build electronic communication from scratch in the wilderness. In summer of 2009, I set out in the mountains of western Montana without any modern tools or materials except information, and constructed a working electric telegraph from materials found on the ground. The experiment showed that electronic communication could have been constructed at any point in history given the right information.
Via immaculatetelegraphy.tumblr.com



personal powerPlant by elisaltarina
enero 31, 2012, 8:34 pm
Filed under: Uncategorized

Via Scoop.itAgronautas

The personal powerPlant is a portable device that harnesses electricity through a solar cell and hand crank generator, into a NiMH battery. The device also includes a visual multimeter that monitors the amount of energy stored. The personal powerPlant can be used to power applications up to 8V at 70 mA.
Via www.instructables.com