Selasa, September 22, 2009

Penny-Powered LED


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

Tidak ada komentar:

Posting Komentar

Langganan: Posting Komentar (Atom)