IPod

iPod is a brand of portable digital audio players designed and marketed by Apple Computer. (Hewlett-Packard also markets the product under the name Apple iPod + HP, but announced on July 29 2005 they would stop reselling it in September 2005, when existing stock is projected to be depleted). Devices in the iPod family offer a simple user interface designed around a central scroll wheel. Most iPod models store media on a built-in hard drive, while the smaller iPod nano and iPod shuffle use flash memory. Like most digital audio players, an iPod can serve as an external data storage device when connected to a computer.

Design

Jeff Robbin headed the iPod firmware team at Apple. His team integrated the core firmware from PortalPlayer with the user interface library developed by Pixo. (The founder of Pixo had worked on the Apple Newton, a personal digital assistant formerly produced by Apple.) The Pixo libraries provide the user interface, though the iPod photo has incorporated some visual elements from Mac OS X, such as the animated Aqua style progress bar. The iPod nano's interface also incorporates the "brushed-metal" effect, previously used in iTunes before version 5.0, in its stopwatch and screen lock features. Until the release of iPod mini, the user interface of all iPods used "Chicago", the font used on the original Macintosh computer from 1984. The iPod mini uses the "Espy Sans" font (previously seen in eWorld, the Newton, and Copland), while the color fourth generation iPods (previously known as iPod photo) use Myriad Pro, Apple's corporate typeface.

Related Topics:
Jeff Robbin - PortalPlayer - Pixo - Apple Newton - Personal digital assistant - Aqua - Chicago - 1984 - EWorld - Copland - Myriad Pro

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This photograph shows the internal view of a third-generation iPod:

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From left to right:

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• An intact third-generation iPod.
• The front of the iPod casing (facedown). The lighter green circuit board controls the iPod (and leaves room for the battery to fit beside it), and the darker green board beneath it controls the touch-scroll wheel and the buttons. Note three connectors: the battery connects in the lower-right corner; the hard drive connector lies to the left of the black area in the lower left; and the headphone jack, wired remote control jack, and Hold switch (all located on the top of the iPod) connect as a single plug in the top right.
• The lithium ion battery.
• The hard drive, surrounded by a layer of soft rubber which also extends beneath it to insulate it from the circuit board. The layer of rubber also helps to protect a spinning hard drive from shock damage while the owner of the iPod moves about.
• The rear of the iPod. Wires connect the ports and switch on the top of the case to a small plug. A hole on the bottom of the case allows access to the dock connector port on the circuit board.

The unit's case snaps together, with no screws or glue involved (though the 4G has some glue holding the battery in place). The plastic front of the case has clips which lock under a ridge inside the rim of the metal case back. A servicer can pry the iPod open by carefully inserting a small non-metal screwdriver to pull the metal away from the clips.

Related Topics:
Screw - Glue - Screwdriver

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iPod contains a small internal speaker which generates the scroll-wheel clicks and alarm clock beep sound, but this internal speaker cannot play music.

Related Topics:
Speaker - Alarm clock

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