Fabrication. Eco Gadgets: DIY Battery Made From Recycled Aluminum Can - Ecofriend. Eco Gadgets: DIY battery made from recycled aluminum can Eco Factor: Portable battery made from old aluminum can, saltwater and charcoal. The billions of batteries discarded every year pose a serious threat to the environment and to the scarce freshwater reserves, which provide potable water to billions of people. Rechargeable batteries do reduce the scare but not as much as environmentalists would really love. Instructables user “Egbertfitzwilly” has posted a nice DIY which allows you to make a battery at home using commonly available materials. The battery uses a casing made from a recycled aluminum can, electrodes of copper and an electrolyte made from burnt charcoal and a saltwater soaked sponge.
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Introduction to Machine Tools. This document will introduce some of the basics of machine tool use for prototype fabrication. There are graphics and sections of video that can be accessed throughout the document. After brief explanations of some machining operations there will be hypertext links to short (about 30 second) video clips. All links in italics access video. The links at the head of the documents allow one to jump forward to desired subject matter. Shop Safety Metal Cutting Physics Measurement Part Layout Band Saw Belt Sander Drill Press (and tapping holes) Lathe Milling Machine Grinding and Buffing Working with Sheet Metal.
Practical Machinist - Largest Manufacturing Technology Forum on the Web. China’s Factories Look to Revamp Business Models. Machining.