Tell us about yourself!
A Fan'n Pan is a great way to remove dust and particulate from the air. put a box fan pointing down at a pan/ tub of water (drop of jet dry doesn't hurt) at the exhaust end or get elaborate an vent into another tub with a fan aimed at the waters surface.
Electrolysis rust removal - motorbike fuel tank
To say it is stealing money out of someones pocket is ridiculous.
Solar Collector Bench Power Station and Sound System
Supercapacitor Programmable Attiny LED flashlight
Wine Bottle Capacitors
High Power LED Driver Circuits
High Quality (and Safe) Copper Plating