Penny-Powered LED
Matthew Ruschmann | Make Vol. 07- 2006 | Pdf | 1 pgs | 1 mb
Power an LED with some salty water and $1.21
Wednesday, September 16, 2009
Penny-Powered LED
Penny-Powered LED
Matthew Ruschmann | Make Vol. 07- 2006 | Pdf | 1 pgs | 1 mb
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