Download e-book for kindle: A Field Guide to Household Technology by Ed Sobey

By Ed Sobey

ISBN-10: 1556526709

ISBN-13: 9781556526701

Illustrating how a hearth alarm detects smoke and what the “plasma” is in a plasma reveal tv, this attention-grabbing guide explains how daily loved ones units functionality and function. greater than a hundred and eighty diversified loved ones applied sciences are lined, together with instruments certain to condo constructions and houseboats. units are grouped in accordance with their "habitats"—the front room, kin room, den, bed room, kitchen, rest room, and basement—and function a detailed description of what the machine does and the way it really works, in addition to a photo for simple identity. With invaluable sidebars describing comparable technical matters, corresponding to why an inexpensive dimmer change can intrude with radio reception, this guide for curious readers presents rigorously certain descriptions and the background at the back of a few of the older family applied sciences like toasters and taps to more moderen applied sciences like movement detectors, TiVo, and satellite tv for pc radio.

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Clocks that plug into the wall count the number of cycles of the 60-cycle-per-second electric current, which is regulated at the electrical power generating plant. Most clocks don’t have an internal power backup, so when they lose power they “forget” what time it is. Reconnecting them to power causes them to revert to the dreaded 12:00. There are several methods for displaying the time. Some clocks have numbers painted on individual panels that rotate. Most digital clocks use seven-component LEDs (light emitting diodes) or a sevensegment LCD (liquid crystal display).

For radios, AM stands for amplitude modulation and FM stands for frequency modulation. These terms refer to the method of adding the radio signal to a carrier wave for broadcast. You dial your radio to the carrier frequency, but a steady tone would be a boring program. In AM broadcasts, the strength of the signal added to the carrier wave is changed and these changes (modulations) convey the music or talk. 44 A F I E L D G U I D E TO H O U S E H O L D T E C H N O LO G Y Satellite Radio and Antenna B E H AV I O R Brings approximately 100 commercial-free radio stations and a national perspective into your home speakers.

With seven lights or bar segments you can create all 10 digits for display. 62 A F I E L D G U I D E TO H O U S E H O L D T E C H N O LO G Y Clock Radio B E H AV I O R Wakes you up with the sweet sounds of easy listening music, or rattles your cage with heavy metal. H A B I TAT Usually positioned atop a nightstand in the bedroom. Located so the “Snooze” button is within easy reach while lying in bed. H O W I T WO R K S Like telephone answering machines, the clock radio is a wonderful example of combining two existing devices to create something new.

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A Field Guide to Household Technology by Ed Sobey

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