Make Flickr photo pool member gl3n writes with his penny-powered LED from MAKE 07 – “After finding out that you can make a 1.5 volt battery out of 13 dimes, 13 pennies, 13 paperclips, some salt water and an ice cube tray, of course we had to try it. It works! “ – Link.
From the pages of MAKE:
- Penny-Powered LED – Power an LED with some salty water and $1.21. Page 17 – MAKE 07. Subscribers–read this article now in your digital edition!