Keith Good Books

Zap it!
Zap it!

By Keith Good

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Introduces the basics behind the operation of various battery-powered electrical devices and provides instructions for making some simple devices that use different kinds of circuits and switches.

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Gear Up!
Gear Up!

By Keith Good

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Introduces the workings of various kinds of simple machinery with moving parts, such as pulleys, levers, gears, cams, and conveyor belts and provides instructions for building these machines out of...

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Build It
Build It

By Keith Good

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Shape it!
Shape it!

By Keith Good

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Includes instructions for a variety of projects made with molding materials and encourages readers to create their own designs.

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Design Challenge
Design Challenge

By Keith Good

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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