Laboratorio de arquitectura.

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• BATTERIES Nickel Hydride (NIMH): These batteries have a payload time 1 to 2 hours. Water batteries have replaced nickel hydride batteries cadmium, almost completely. Water batteries nickel are more expensive but less toxic, no longer suffer from memory effect and much more durable than Hydride batteries cadmium.

• BATTERIES LITHIUM-ION: These batteries are longer lasting 2 to 3 hours and higher production. The lithium ion batteries are the most durable but more expensive. These do not suffer from memory effect, but take much longer to recharge the nickel of water.

THE PORTABLE SCREENS

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The screens of laptops are made of liquid crystal. This panel is the same type as used in most digital watches.

Liquid crystal displays use very little electricity and weigh much less than the desktop screens. This reduces the consumption of battery power and makes the easiest to carry portable.

The majority of portable displays have an internal light source located at the rear or to the side of the screen. This makes the screen easier to read in low light areas, however this shortens charging a battery.

LCD screen used in a laptop PC, generally are less than 9 inches diagonally and display at least 250 colors at a resolution of 640x480. The higher the resolution of your computer, the better you will see what is on screen.

SCREEN TYPES

ACTIVE screen also called TFT (Thin Film Transistor) is the best and also the most expensive because each of the 480,000 (800x600) or more points or pixels is controlled independently, thus offering brighter colors and homogeneous. Also the viewing angle is larger. In addition freshened time is less so they can be seen moving images (animations or videos) almost like a monitor. This type of screen is recommended for those who make presentations or want to work in bright places.

• The PASSIVE screen controls points based on a crossing horizontal and vertical coordinates. They are much cheaper, but quality is lost in the picture and video are a bit fuzzy because an image has not disappeared completely when longer appears the next. This type of screen has been replaced by the next 2.

• The DualScan or DSTN displays are passive displays improved which has been divided control of the image into two parts: Upper and Lower, so it is normal to see a horizontal line at half screen resulting from the junction of the two parts. This screen is economical and is recommended for those who will work on word processor or spreadsheet in an environment of office lighting.

• The screens HPA (high performance adressing) are more advanced than DualScan passive displays.

SLOTS AND CARDS PC

- Slots PC

- PC Cards

- Types of PC Cards

SLOTS PC

These slots serve to accommodate the network card or for connecting accessories such as cards used in digital cameras.

The slots are handled PC types that relate to the thickness of the device. Type II slots are for thin cards and Type III for thicker cards.

It is important to know that if a computer has two slots type II, is like automatically have a type III because when entering a card that is thicker than one of the slots will use the two Type II slots.

PC CARDS

The PC card is like a credit card, which allows you to add new elements to your laptop device.

Adding new elements to a portable adds weight and takes up space. To solve this problem the International Association of Personal Computer Memory (PCMCIA) has designed the PC card, to add new items to laptops. A PC card is also called the card PMCIA

A PC card allows you to add new items like these to your notebook:

- Capacity Modulator Demodulator (Modem)

- Network Capabilities

- Additional hard disk space

- Quality sound with Digital

We can insert a PC card into a PC slot. The majority of laptops have two receptacles that accept PC cards.

This allows you to insert:

- Two cards type I, or

- Two Type II cards, or

- A type III card.

PC CARDS TYPES

Type I: 3.3 mm thick, this PC card is used to add memory to the notebook.

Type II: From 5.0 mm thick this PC card is used to add capacity portable Moden, network capabilities and digital quality sound.

Type III: 10.5 mm thick, this PC card is used to add larger devices such as removable hard disk drives.

Some PC cards contain multiple functions. A simple PC card can provide, such as digital audio and modem capabilities.

The Type I cards initially were used to add memory, but they are being replaced by new Flash memory cards (size type II) that can store images from a digital camera, these cards can be inserted into a laptop to make data transfer easier.

Most PC Cards are Type II size, the most popular devices are modems and network cards. Type II cards are also used as an interface to external peripherals, these cards are connected to a cable, just the card to the laptop is inserted to establish the connection.

Ethernet Type II adapters are also available with the interface allowing easier corporate infrastructure.

The first interface PCMCIA (still in use) has a data bus I / S of 16 bits. As technology advanced developing an interface PCMCIA 32-bit CardBus call. The CardBus cards are not working on a 32-bit slot, but can not take advantage of the benefits of the new interface. The CardBus card provides better energy storage and runs at 3.3 volts instead of 5 volts if 16-bit card is used.

STORAGE DEVICES

- The Hard Disk Drive

- The unit Diskettes