THINKING LIKE AN ENGINEER W/ACCESS
17th Edition
ISBN: 9781323522127
Author: STEPHAN
Publisher: PEARSON C
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Chapter 18, Problem 1RQ
The Apple TV™ is a personal video device created by Apple, Inc. that attaches to high- definition televisions to present streaming content to a viewer on demand, in contrast to a standard source (cable/satellite) set-top box or digital video recorder (DVR) that presents recorded or live broadcast signals on a television. According to a study conducted by the Natural Resources Defense Council in June 2011 , if consumers were to move from set-top boxes to smaller "thin" devices like the Apple TV, there would be an overall 70% reduction in annual energy costs resulting from the use of set-top boxes.
The following data table shows the typical power consumption of the Apple TV in different power states (standby/off, idle-not playing any video content, playing via Ethernet, and playing via Wifi). Create an algorithm that allows a user to provide the power currently being used by their Apple TV in units of watts and determine the state of the device. If the user provides value for the power outside the range in the following table, your algorithm should report that the state of the device is unknown.
Power Consumption of the Apple TV
| State | Power Consumption [W] |
| Off/Standby | less than 0.5 |
| Idle | 0.5 to 1.5 |
| Streaming via Ethernet | 1.5 to 1.6 |
| Streaming via Wdi | 1.6to 2 |
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Chapter 18 Solutions
THINKING LIKE AN ENGINEER W/ACCESS
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