Alarm System: Contacts (Window & Door Switches)

Alarm Contacts- Contact switches are magnetic switches used to protect doors and windows for the most part. There are three main styles that are used by most alarm companies. They are recessed contacts, surface mount contacts and roller-ball contacts. Recessed contacts are hidden in the window tracks and door jams so that they can not…

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The Brain and Muscles

When discussing how the brain works you want to make sure to cover the communication between the brain and the muscle structure. Think of the brain as a giant computer. All the signals have to come from the brain to control the muscles and other functions of the body. Then again there is a communication…

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Metalworking: Transforming Our World

Tools, for centuries, have made humans very unique on planet Earth. No organisms that we know of have been able to match the skill level humans have achieved regarding tool building and other creations. Metals have been used for centuries for that purpose. The field of studying the physical and chemical behavior of metallic elements…

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Understanding Compact Fluorescent Lighting (CLFs)

Compact Fluorescent Lighting (CFL) has been so successful in replacing the traditional light bulbs (incandescent) and fit in existing light fixtures to produce more energy-efficient lighting. Edward Hammer developed the spiral shaped bulb to try to pack in enough tube yet allow enough space between the coils to decrease blockage of light. Today, Hammer’s spiral…

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