Published on 22 Mar 2014 | over 3 years ago
Salt water battery + Joule thief circuit.
Materials : Copper plate, Aluminum Foil, Kitchen Towel, Warm Salt water, Joule thief circuit
Bigger copper plate & Aluminum Foil is more powerful.
This battery lamp turned on one hour.. but if you replace salt water, it will be lasting until the foil almost erode.
Report video function is under development.