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Gabinets
- 1. types of cabinets(mini-tower, desktop, tower and integrated into the screen) -------------------------------------------------------------------------------------------------------------------------------------------------------------------- It runs on many websites and even books, the type of cabinet is based on the size of the main board (motherboard) to be inserted, however a card of a certain size can be adapted successfully to cabinets in various ways so therefore not a standard way to classify them, so it is considered that the effective way is according to the form and use: Desktop Cabinet. Minitower cabinet. Integrated into the display cabinet. Office tower (for servers and duplicators). Features horizontal cabinet -------------------------------------------------------------------------------------------------------------------------------------------------------------------- Is designed to be "lying" on a firm surface. It has few possibilities of placing optical drives, digital memory reader, floppy drives and additional. It is designed to withstand the weight of a CRT monitor on it. Saves space, as the monitor and the cabinet are on each other. No internal fans can place more than the integrated factory. They currently have integrated front ports to avoid placing devices often used in rear ports (USB ports, FireWire, Jack 3.5 "headphone, etc.). Features minitower cabinet ------------------------------------------------------------------------------------------------------------------------------------------------------ Is designed to be "standing" on a firm surface. It has the potential to expand its functions with optical drives, digital memory reader, floppy drives and additional. Not designed to put a CRT monitor on their sides, so it should be placed independently. The current cabinet has an air inlet side, which leads directly to the air to the microprocessor. Regularly takes up more space, which is placed on the desk, this because the ground must not be placed. Can place multiple internal fans, allowing the devices do not overheat and lose life. They currently have integrated front ports to avoid placing devices often used in rear ports (USB ports, FireWire, Jack 3.5 "headphone, etc.).
- 2. Cabinet Features on-screen Thescreen and cabinet are sharing the same chassis and covers. Such cabinets began to popularize computer signature Macitosh ® Apple ®, which then had CRT monitors and other computer integrated iMac ® currently use LCD screens. The major drawback is that if it fails or the computer screen, the two systems are disabled and can not use any of them. Is designed to be "standing" on a firm surface and the space it occupies is minimal due to the small size that counts. It has the potential to expand its functions with optical drives, digital memory reader or extra hard drives. It has the advantage of having some portability by design, since it is more safe to transfer from one place to another and even less weight. It has integrated front ports to avoid placing devices often used in rear ports (USB, FireWire, and Jack 3.5 "headphones). General characteristics of the tower cabinet ------------------------------------------------------------------------------------------------------------------------------ Basically comes factory assembled with an optical reader (CD, DVD, HD-DVD or Blu-Ray Disc) and several units recorded (burners "); this to generate multiple copies of a single disk in sync. Is designed to be "standing" on a firm surface, its height varies with the amount of bays it has, growing to up to 11. These teams may or may not have a top panel, equipped with a small LCD screen and function buttons, so since it is possible to manipulate the etching processes without accessories such as CRT monitors, keyboards, mouse (Mouse), etc. . They have internal architecture of a conventional computer (hard drive, motherboard special ("motherboard"), microprocessor, RAM, power supply), only that these towers have a specific use. They have a main board (motherboard) special, which supports the connection of multiple optical drives as opposed to a standard that allows a maximum of up to 6 (combining IDE drives (hard drives and optical drives with 40 pin interface) and type (SATA disks drives and optical drives with 7 pin interface)). Regularly take up much space because their dimensions are large and are commonly placed on the floor, because it weighs a lot. Can place multiple internal fans, allowing the devices do not overheat and lose life.
- 3. :::::::::::::::::::::::::::::::::::::::::::::::::::: Power Supply::::::::::::::::::::::::::::::::::::::::::::::::: In electronics, a power supply is a device that converts the AC voltage supply network, in one or several strains, almost continuous feeding the various circuits of the electronic device that connects(computer, television, printer, router , etc.).. Classification Power supplies for electronic devices, can be classified as basically linear power supplies and switches. The linear design are relatively simple, it can become more complex the greater the current to be supplied, but its voltage regulation is inefficient. A switching power supply, the same power as a linear, will be smaller and usually more efficient but is more complex and therefore more susceptible to breakdowns. Power collinear The line sources follow the pattern: transformer, rectifier, filter, and output regulation. First transformer adapts the voltage level and provides galvanic isolation. The circuit that converts alternating current rectifier is called continuous, then usually have a circuit that reduces the ripple as a filter capacitor. Regulation, or stabilization of the voltage to avalue set, is achieved with a component called the voltage regulator. The output may simply be a capacitor. This stream includes all the energy of the circuit, this power supply should be taken into account some specific points in deciding the characteristics of the transformer. Switching Power Supply A switching power supply is an electronic device that converts electrical energy by switching transistors. While a voltage regulator uses transistors biased in the active region of amplification, switching power supplies use the same switch turns at high frequencies (20-100 kHz typically) from cut (open) and saturation (closed). The resulting square wave is applied to transformers with ferrite core (iron cores are not suitable for these high frequencies) for one or more output voltages of alternating current (AC) which are then ground (with fast diode) and filtered (inductors and capacitors) for the output voltages of direct current (DC). The advantages of this method include smaller size and weight of the core, more efficient and therefore less heating. The disadvantage compared with linear sources is that they are more complex and generate high-frequency electrical noise that must be carefully minimized to avoid causing interference to nearby equipment to these sources. The switching power supplies are designed scheme: rectifier, switch, transformer, rectifier and other output. The regulation is obtained with the switch, typically a circuit PWM (Pulse Width Modulation) which changes the duty cycle. Here the functions of the transformer are the same as for line sources but its position is different. The second rectifier converts alternating pulse signal coming from the transformer into a continuous value. The output can also be a filter capacitor or an LC type. The advantages of line sources are better regulation, better speed and EMC characteristics. Moreover the commuted get better performance, lower cost and size.