More EL chemistry: Luminescent ink
[Jeri Ellsworth] continues her experiments with electroluminescence, this time she’s making EL ink. The ink she’s looking for is Zinc Sulfate in a solution. The process she chose is to re-dope some...
View ArticleMayor is a hacker and wants to use DIY parking meters
The Mayor of Silverton, Oregon is a hacker and wants to use roll-your-own hardware in the town’s parking meters. It’s not that he thinks he can do a better job than companies selling modern meters...
View ArticlePenny and Paper Clip Heat Sinks
A bunch of audio heads over at the Head-Fi forum were discussing handy and quick heat sinking methods, leading to much speculation and conjecture. This finally prompted [tangentsoft] to take matters in...
View ArticleDIY 9V Battery
Volta’s pile — the first battery — was little more than silver and zinc discs separated by paper soaked in salt water. A classic classroom experiment is to build a pile from copper pennies, tin foil,...
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