New PDF release: A Field Guide to Household Technology

By Ed Sobey

ISBN-10: 1556526709

ISBN-13: 9781556526701

Illustrating how a fireplace alarm detects smoke and what the “plasma” is in a plasma display tv, this interesting guide explains how daily loved ones units functionality and function. greater than a hundred and eighty diverse family applied sciences are coated, together with contraptions distinctive to condo constructions and houseboats. units are grouped based on their "habitats"—the front room, kin room, den, bed room, kitchen, rest room, and basement—and characteristic a detailed description of what the gadget does and the way it really works, in addition to a photo for simple id. With necessary sidebars describing similar technical concerns, reminiscent of why an inexpensive dimmer swap can intrude with radio reception, this instruction manual for curious readers offers rigorously unique descriptions and the heritage at the back of a number 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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Current passes through a circuit of electrically insulated heating wire that is embedded inside a blanket. The control keeps the blanket from overheating. The first electric blanket with thermostat went on the market in 1936 as a heating pad. It wasn’t until the 1950s that they were called electric blankets. 60 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 Waterbed B E H AV I O R Supports the weight of a sleeping person on a layer of water. H A B I TAT Once found only in the bedrooms of the very hip, waterbeds can be found anywhere.

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. Since its introduction in 1947, the clock radio has been a bedroom mainstay. The two devices operate separately, but can also function together. Older models have analog clocks and operate mechanically: gears rotate with the clock mechanism and trip a switch to turn off the radio (slumber mode) or turn it on (alarm mode). Newer models have digital displays and electronic circuits to control the alarm, various sounds, and the radio.

The shorter wavelength for DVDs allows the laser to read finer detail. Data covers more of the surface area of a DVD than CD, and less data storage is allocated to error correction. The various changes from the CD format allow the DVD to hold so much more data. Like CDs, DVDs are read from the inside (near the center) towards the outer edge in a long spiral. 3 km). 32 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 Television B E H AV I O R It projects video signals on a glass screen and plays corresponding audio signals through speakers.

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A Field Guide to Household Technology by Ed Sobey

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