schematic diagram motherboard

schematic diagram motherboard

Computer Block Diagram - PC Schematic
Here is a brief summary computer block

diagram of a typical Personal Computer.
The von Neumann (CISC) architecture employs a single bus. CISC stands for Complex Instruction Set Computer. A single-bus system is illustrated.

The Harvard (RISC) architecture utilizes two busses - a data bus and a separate address bus. RISC stands for Reduced Instruction Set Computer.
Relationships are shown between the CPU, DRAM, local bus, and the peripherals which connect to the motherboard. The ISA bus, SCSI Bus, PCI bus and USB Bus are shown. Some typical computer parameters are given, along with a Graphics Resolution chart.


MOTHERBOARD SCHEMATIC 759-057-11 REV A PAGE 1 OF 3
ELECTRONIC DIAGRAMS & PARTS: GAME KING PLUS 19” UPRIGHT (821-352-00) - ( PRELIMINARY). AUGUST 24, 2001. MOTHERBOARD SCHEMATIC. 759-057-11. REV A. PAGE 2 OF 3

Schematic Diagram Motherboard - Free Download
Find Schematics & Circuit Diagrams as Schematic Diagram Motherboard. Free Downloads

schematic diagram of power supply using LM7905

schematic diagram of power supply using LM7905

Negative Power Supply

circuit schematic lm7905

Acer AL1916WAB 19" Widescreen LCD Monitor

Acer AL1916WAB 19" Widescreen LCD Monitor

Technical Details

* 19" wide-screen TFT LCD

* 1440 x 900 native resolution

* 700:1 contrast ratio

* 150 /130 degree horizontal/vertical viewing angle

* 5 ms response time





Product Description

From the manufacturer

Enhance your vision with the Acer AL1916WAB 19" Widescreen LCD Monitor. Incorporating the latest LCD technology, the Acer AL1916WAB offers the best visibility, performance and unprecedented value. The high level of brightness 300cd/m2 together with the optimal contrast ratio of 700:1 renders crisp images and enhances legibility. With its fast response time of 5ms, the Acer AL1916WAB brings remarkable display quality to your desktop.



Features



* 19" wide-screen TFT LCD

* 1440 x 900 native resolution

* 700:1 contrast ratio

* 150/130 degree horizontal/vertical viewing angle

* VGA connector

* 300 cd/m2 brightness

* 5ms response time

* Black bezel



Product Description

The Acer AL1916 can help office users maximize their efficiency by simultaneously viewing multiple applications on the large 19" screen. Gamers and movie lovers will enjoy the high-quality color and rapid response rate.

Lcd Tv Schematic Diagram

Welcome and thanks for visiting our site if this is your first visit you can bookmark using ctrl+d to remember our site. In this post if you looking for Lcd Tv Schematic Diagram you can download it for free using the download image below

Download Free Lcd Tv Schematic Diagram


schematic, driver download, diagram, ebook, user manual service, pdf manual, software update

Download Sharp - LC26, LC32P50E, LC37P50E Schematic-Diagram

Download Sharp - LC26, LC32P50E, LC37P50E Schematic-Diagram

LCD TV / AV Monitor

LC26, LC32P50E, LC37P50E Schematic-Diagram

download LC26, LC32P50E, LC37P50E Schematic-Diagram

voltage regulator lm7805

Voltage Regulator (regulator), usually having three legs, converts varying input voltage and produces a constant regulated output voltage. They are available in a variety of outputs.


The most common part numbers start with the numbers 78 or 79 and finish with two digits indicating the output voltage. The number 78 represents positive voltage and 79 negative one. The 78XX series of voltage regulators are designed for positive input. And the 79XX series is designed for negative input.

Examples:

· 5V DC Regulator Name: LM7805 or MC7805

· -5V DC Regulator Name: LM7905 or MC7905

· 6V DC Regulator Name: LM7806 or MC7806

· -9V DC Regulator Name: LM7909 or MC7909

The LM78XX series typically has the ability to drive current up to 1A. For application requirements up to 150mA, 78LXX can be used. As mentioned above, the component has three legs: Input leg which can hold up to 36VDC Common leg (GND) and an output leg with the regulator's voltage. For maximum voltage regulation, adding a capacitor in parallel between the common leg and the output is usually recommended. Typically a 0.1MF capacitor is used. This eliminates any high frequency AC voltage that could otherwise combine with the output voltage. See below circuit diagram which represents a typical use of a voltage regulator.
 
 
 

Note:

As a general rule the input voltage should be limited to 2 to 3 volts above the output voltage. The LM78XX series can handle up to 36 volts input, be advised that the power difference between the input and output appears as heat. If the input voltage is unnecessarily high, the regulator will overheat. Unless sufficient heat dissipation is provided through heat sinking, the regulator will shut down.
source : http://www.eidusa.com/Electronics_Voltage_Regulator.htm

LM7805 • LM7806 • LM7808 • LM7809 •LM7810 • LM7812 • LM7815 • LM7818 • LM7824 •LM7805A • LM7806A • LM7808A •LM7809A •LM7810A • LM7812A • LM7815A • LM7818A • LM7824A

LM7805 • LM7806 • LM7808 • LM7809 •LM7810 • LM7812 • LM7815 • LM7818 • LM7824 •LM7805A • LM7806A • LM7808A •LM7809A •LM7810A • LM7812A • LM7815A • LM7818A • LM7824A datasheet Positive Voltage Regulator

3-Terminal 1A Positive Voltage Regulator


General Description

The LM78XX series of three terminal positive regulators are

available in the TO-220 package and with several fixed output

voltages, making them useful in a wide range of applications.

Each type employs internal current limiting, thermal shut down

and safe operating area protection, making it essentially inde-

structible. If adequate heat sinking is provided, they can deliver

over 1A output current. Although designed primarily as fixed

voltage regulators, these devices can be used with external

components to obtain adjustable voltages and currents

 

 

Features

 Output Current up to 1A

Output Voltages of 5, 6, 8, 9, 12, 15, 18, 24

 Thermal Overload Protection

Short Circuit Protection

 Output Transistor Safe Operating Area Protection

bc547 datasheet

bc547 datasheet

NPN general purpose transistors

Philips Semiconductors

FEATURES


• Low current (max. 100 mA)

• Low voltage (max. 65 V).

APPLICATIONS

• General purpose switching and amplification.

DESCRIPTION

NPN transistor in a TO-92; SOT54 plastic package.

PNP complements: BC556 and BC557

download  bc547 datasheet

M7 Pre amplifier - amplifiers tube

M7 Pre amplifier - amplifiers tube

M7 Preamplifier

300 2x 10W Integrated Amplifier - amplifiers tube

300 2x 10W Integrated Amplifier. (amplifiers tube)
The Audio Innovations 300 integrated amplifier was introduced in 1986. The 300Mk2 was introduced 5 years later in 1991. It is a 2x 10W Push-Pull amp using two ECL86's per channel in the power amp. It features 5 line inputs (4 for the Mk2) and a phono input.

18v power supply USING LM350T

18v power supply USING LM350T

This is a classic linear power supply which produces a regulated 18v, rated at about 1 amp.

POWERSUPPLY

18V / 1 AMP POWER SUPPLY

7805 power supply

5V power supply using 7805

7805 is a 5V fixed three terminal positive voltage regulator IC .The IC has features such as safe operating area protection,thermal shut down, internal current limiting which makes the IC very rugged.Out out currents up to 1A can be drawn from the IC provided that there is a proper heat sink.A 9V transformer steps down the main voltage , 1A bridge rectifies it and capacitor C1 filters it and 7805 regulates it to produce a steady 5V DC .

Circuit diagram with Parts list.

powersupply

Notes.

The bridge D1 can be also made by yourself by using four 1N 4007 diodes.

If more than 400mA current is supposed to be taken from the circuit , fit a heat sink with to the 7805 IC.

12vdc power supply

12vdc power supply

12Volt DC Power Supply

D1 = BRDIGE

C1 = 2000UF / 25V

R1 = 200 R

D2 = IN759

R2 = 10K

Q1 =2N3053

Make Your Own Printed Circuit Boards on a Laserjet

Make Your Own Printed Circuit Boards on a Laserjet
This week, I collaborated with Xander to show you how to make your own printed circuit boards (PCBs) using a laserjet printer.

Make Your Own Printed Circuit Boards on a Laserjet

switchmode power supply

switchmode power supply

A Switchedmode power supply (also Switchingmode power supply, SMPS, or simply Switcher) is an electronic Power Supply Unit (PSU) that incorporates a switching regulator in order to provide the required output voltage. An SMPS is actually a power converter that transmits power from a source (e.g., a battery or the electrical power grid) to a load ( a personal computer) with ideally no losses. The function of the converter is to provide a reliable output voltage often at a different level than the input voltage.


When mechanical shafts are rotating, a simple gear train can deliver power to a shaft at one speed from a shaft at a different speed. However, fluid power can be converted from a source with one pressure–flow ratio to another pressure–flow level without rotation by using the switching action of a hydraulic ram. Similarly, when AC power is being delivered from an AC source, a simple transformer can be used to convert power at one voltage level to power at another voltage level with low losses. Likewise, the switched action of an SMPS can convert DC power with low losses.
 
Switching-Mode Power Supply Design
This site is dedicated to switching-mode power supply circuit designers. Here you will find solutions to the most difficult problems facing you as a power supply designer, a tutorial that places power supply design problems in context, and resources that aid in your power supply design tasks. If you are a first-time visitor you will want to read this page as an orientation. If you have been here before (thank you for coming back), use the menu on the right to find the power supply design information you need.
 
Power Supplies Reference Manual and Design Guide
in the SWITCHMODE Power Supplies Reference Manual and Design Guide should ...... SWITCHMODE power supplies. The ICs for Switching Power Supplies figure
 
 
Switch Mode Power Supplies
SwitchMode Power Supplies: From Circuit Theory to the Workbench. Michael Tse ... To show how a switchmode power supply can be ..
 
 
Efficient Switchmode Power Supply Start-Up Circuit
Introduction


The purpose of this application note is to demonstrate the many advantages of using the Supertex LND150N3 in the

start-up circuit for switchmode power supplies.

Commonly used low voltage bipolar, CMOS and BiCMOS switchmode power supply PWM ICs usually operate from

supply voltages of up to 18V. When the input power for the switchmode converter is available at voltages higher than

the maximum voltage rating of the IC, the voltage has to be reduced with a start-up circuit. A frequent requirement is

for operation directly from a rectified 120V or 240V AC line without the use of tap changing switches for the selection of different voltages.
 
 
 
 

Small Variable Power Supply Circuit Using LM723

Small Variable Power Supply Circuit Using LM723

This circuit is a circuit diagram of a variable power supply. Variable power supply circuit is a simple but reliable one based on an integrated voltage regulator from the eldest LM723. R2 set the output voltage. The maximum flow is determined by the value of R3, the excessive current in the circuit protection senses R3 and LM723 voltage output stage begins to close off this fast voltage approaches 0.65 V. In this way the current through R3 can never exceed 0.65/R3, even if output is shorted. C3 and C4, both ceramic, should be placed as close as possible to the integrated circuit, because the LM723 can be vulnerable to unwanted oscillations. The following is a schematic drawing:

The LM723 works with the input DC voltage V and IC 9,5-40 itself can be the source of about 150 mA if the output voltage is not more than 6-7 V below the input. When the external pass transistor is used (in the usual emitter-follower mode), the base-emitter of T1 is a significant resistance and the output stage of integrated circuits is relatively light load. All the current drawn by the load through a T1 and it decreases the amount of power that is proportional to the current and the difference between input and output DC voltage.

Source: www.zen22142.zen.co.uk

adjustable regulated power supply - 1.2 - 15Volt /3A

 adjustable regulated power supply 1.2 - 15Volt /3A

This kit provides a variable output power supply ranging from 1.2 to 15 Volt / 3 A. It uses Low Dropout Positive Regulator LM1084 in TO220 package for delivering variable output voltage.

Schematic

Input - 18 VAC/DC




Output - variable output from 1.2 ~ 15 VOLT / 3 A Regulated low ripple DC voltage
Heatsink for regulator IC

On board bridge rectifier to convert AC to DC

LED indication at input of IC

Power Battery Terminal (PBT) for easy input and output connection

Zener trimmed band gap reference, current limiting and thermal shutdown (provided by IC feature)

Filter capacitors for low ripple DC output

Onboard PCB mounted Potentiometer (POT) for varying the output voltage

PCB dimensions 46 mm x 58 mm

Four mounting holes of 3.2 mm each


Parts List :
 
BR1 = BR34
CN1 = 2 PIN PBT
CN2 = 2 PIN PBT
C1 = 2200UF /25V
C2 = 0.1UF
C3 = 47UF / 25V
D1 = RED LED
P1 = 4.7K POT
R1 = 1.5K
R2 = 120ohm
U1 = LM1084

Adjustable power supply using LM317

Adjustable power supply using LM317

For the LM317:


R2 = (192 x Vout) - 240, where R2 in ohms, Vout is in volts and must be at between 1.2 V and 35 V.

Vin should be at least 2.5V greater than Vout. Select a wall adapter with a voltage at least 2.5 V greater than your regulated output at full load

Maximum output current is 1 A. Use proper heatsink for LM317 if it has to dissipate more than 1W.

The tab of the LM317 is connected to the center pin.

tda audio amplifier

tda audio amplifier

home audio amplifiers

power amplifier circuit

TDA2040

20W HIFI POWER AMP

TDA7057Q

2x3W POWER AMP

 

TDA7233S

1.6W POWER AMPLIFIER

 

car amplifier stereo

TDA1554Q

AUDIO AMP 2x11W

 

TDA1553Q

POWER AMP 2x22W

 

TDA1521

POWER AMP 2x12W

 

TDA1514

POWER AMP 40W

 

TDA1010A

POWER AMP 9W

 

TDA 2040

20W HIFI AUDIO AMPLIFIER

 

TDA7241

20W POWER AMPLIFIER

 

 

TDA7350

2x12W POWER AMP

 

 

cheap car amplifier

TDA2003

10W POWER AMPLIFIER

 

TDA2004

2x10W POWER AMP

 

TDA2008

12W POWER AMPLIFIER

 

 

TDA2009

POWER AMP 2x9W

 

2n5551 datasheet

2n5551 datasheet

NPN General Purpose Amplifier

This device is designed for general purpose high voltage amplifiers


and gas discharge display driving. Sourced from Process 16
 
NPN EPITAXIAL PLANAR SILICON HIGH VOLTAGE TRANSISTOR
 
downlaod  2n5551 datasheet  and MMBT5551

irf630 datasheet

irf630 datasheet

IRF630 IRF630FP

TYPICAL RDS(on) = 0.35 Ω

EXTREMELY HIGH dV/dt CAPABILITY

VERY LOW INTRINSIC CAPACITANCES

GATE CHARGE MINIMIZED

DESCRIPTION


This power MOSFET is designed using he


company’s consolidated strip layout-based MESH

OVERLAY™ process. This technology matches

and improves the performances compared with

standard parts from various sources.


APPLICATIONS

HIGH CURRENT SWITCHING

UNINTERRUPTIBLE POWER SUPPLY (UPS)

DC/DC COVERTERS FOR TELECOM,

INDUSTRIAL, AND LIGHTING EQUIPMENT.

 
download  irf630 datasheet

 

 

 
pinout irf630
 
IRF630-circuits
 
 

irf3205 datasheet

IRF3205

HEXFET® Power MOSFET
 

Description



Advanced HEXFET® Power MOSFETs from International



Rectifier utilize advanced processing techniques to achieve


extremely low on-resistance per silicon area. This


benefit, combined with the fast switching speed and


ruggedized device design that HEXFET power MOSFETs


are well known for, provides the designer with an extremely


efficient and reliable device for use in a wide variety of


applications.


The TO-220 package is universally preferred for all


commercial-industrial applications at power dissipation


levels to approximately 50 watts. The low thermal


resistance and low package cost of the TO-220 contribute


to its wide acceptance throughout the industry.


l Advanced Process Technology


l Ultra Low On-Resistance


l Dynamic dv/dt Rating


l 175°C Operating Temperature


l Fast Switching


l Fully Avalanche Rated


download irf3205 datasheet

buz11 datasheet

buz11 datasheet

30A, 50V, 0.040 Ohm, N-Channel Power



MOSFET

This is an N-Channel enhancement mode silicon gate power


field effect transistor designed for applications such as


switching regulators, switching converters, motor drivers,


relay drivers and drivers for high power bipolar switching


transistors requiring high speed and low gate drive power.


This type can be operated directly from integrated circuits.


Formerly developmental type TA9771.
 
 
Features



• 30A, 50V


• rDS(ON) = 0.040Ω


• SOA is Power Dissipation Limited


• Nanosecond Switching Speeds


• Linear Transfer Characteristics


• High Input Impedance


• Majority Carrier Device


• Related Literature


- TB334 “Guidelines for Soldering Surface Mount


Components to PC Boards”
 
DOWNLOAD BUZ11 DATASHEET

IR2110 DATASHEET

ir2110 datasheet
HIGH AND LOW SIDE DRIVER

IR2110(-1-2)(S)PbF/IR2113(-1-2)(S)PbF

Features


• Floating channel designed for bootstrap operation

Fully operational to +500V or +600V

Tolerant to negative transient voltage

dV/dt immune

• Gate drive supply range from 10 to 20V

• Undervoltage lockout for both channels

• 3.3V logic compatible

Separate logic supply range from 3.3V to 20V

Logic and power ground ±5V offset

• CMOS Schmitt-triggered inputs with pull-down

• Cycle by cycle edge-triggered shutdown logic

• Matched propagation delay for both channels

• Outputs in phase with inputs
 
 
Description


The IR2110/IR2113 are high voltage, high speed power MOSFET and

IGBT drivers with independent high and low side referenced output chan-

nels. Proprietary HVIC and latch immune CMOS technologies enable

ruggedized monolithic construction. Logic inputs are compatible with

standard CMOS or LSTTL output, down to 3.3V logic. The output

drivers feature a high pulse current buffer stage designed for minimum

driver cross-conduction. Propagation delays are matched to simplify use in high frequency applications. The

floating channel can be used to drive an N-channel power MOSFET or IGBT in the high side configuration which

operates up to 500 or 600 volts
 
download  ir2110 datasheet

irf840 datasheet

irf840 datasheet

8A, 500V, 0.850 Ohm, N-Channel Power



MOSFET


This N-Channel enhancement mode silicon gate power field


effect transistor is an advanced power MOSFET designed,

tested, and guaranteed to withstand a specified level of


energy in the breakdown avalanche mode of operation. All of


these power MOSFETs are designed for applications such


as switching regulators, switching converters, motor drivers,


relay drivers, and drivers for high power bipolar switching


transistors requiring high speed and low gate drive power.


These types can be operated directly from integrated


circuits.


Formerly developmental type TA17425.
 
 
Features



• 8A, 500V


• rDS(ON) = 0.850Ω


• Single Pulse Avalanche Energy Rated


• SOA is Power Dissipation Limited


• Nanosecond Switching Speeds


• Linear Transfer Characteristics


• High Input Impedance


• Related Literature


- TB334 “Guidelines for Soldering Surface Mount


Components to PC Boards”
 
download irf840 datasheet

irfp460 datasheet

irfp460 datasheet

IRFP460

N - CHANNEL 500V - 0.22 Ω - 20 A - TO-247


PowerMESH™ MOSFET



TYPICAL RDS(on) = 0.22 Ω



EXTREMELY HIGH dv/dt CAPABILITY



100% AVALANCHE TESTED

VERY LOW INTRINSIC CAPACITANCES

GATE CHARGE MINIMIZED


DESCRIPTION


This power MOSFET is designed using the


company’s consolidated strip layout-based MESH


OVERLAY™ process. This technology matches


and improves the performances compared with


standard parts from various sources.


APPLICATIONS :



HIGH CURRENT SWITCHING


UNINTERRUPTIBLE POWER SUPPLY (UPS)

DC/DC COVERTERS FOR TELECOM,


INDUSTRIAL, AND LIGHTING EQUIPMENT
 
 
download irfp460 datasheet

irf9540 datasheet

irf9540 datasheet

IRF9540, RF1S9540SM

19A, 100V, 0.200 Ohm, P-Channel Power


MOSFETs

These are P-Channel enhancement mode silicon gate

power field effect transistors. They are advanced power

MOSFETs designed, tested, and guaranteed to withstand a

specified level of energy in the breakdown avalanche mode

of operation. All of these power MOSFETs are designed for

applications such as switching regulators, switching

convertors, motor drivers, relay drivers, and drivers for high

power bipolar switching transistors requiring high speed and

low gate drive power. They can be operated directly from

integrated circuits.

Formerly Developmental Type TA17521.
 
 
 
Features


• 19A, 100V

• rDS(ON) = 0.200Ω

• Single Pulse Avalanche Energy Rated

• SOA is Power Dissipation Limited

• Nanosecond Switching Speeds

• Linear Transfer Characteristics

• High Input Impedance

• Related Literature

- TB334 “Guidelines for Soldering Surface Mount

Components to PC Boards”
 
download irf9540 datasheet

irf9530 datasheet

irf9530 datasheet

12A, 100V, 0.300 Ohm, P-Channel Power


MOSFETs

These are P-Channel enhancement mode silicon gate power

field effect transistors. They are advanced power MOSFETs

designed, tested, and guaranteed to withstand a specified

level of energy in the breakdown avalanche mode of

operation. All of these power MOSFETs are designed for

applications such as switching regulators, switching

convertors, motor drivers, relay drivers, and drivers for high

power bipolar switching transistors requiring high speed and

low gate drive power. The high input impedance allows these

types to be operated directly from integrated circuits.

Formerly developmental type TA17511.
 
 
Features


• 12A, 100V

• rDS(ON) = 0.300Ω

• Single Pulse Avalanche Energy Rated

• SOA is Power Dissipation Limited

• Nanosecond Switching Speeds

• Linear Transfer Characteristics

• High Input Impedance

• Related Literature

- TB334, “Guidelines for Soldering Surface Mount

Components to PC Boards”
 
download irf9530 datasheet

irf9520 datasheet

irf9520 datasheet

6A, 100V, 0.600 Ohm, P-Channel Power


MOSFET

This advanced power MOSFET is designed, tested, and

guaranteed to withstand a specified level of energy in the

breakdown avalanche mode of operation. These are

P-Channel enhancement mode silicon gate power field

effect transistors designed for applications such as switching

regulators, switching converters, motor drivers, relay drivers

and drivers for high power bipolar switching transistors

requiring high speed and low gate drive power. These types

can be operated directly from integrated circuits.

Formerly developmental type TA17501

 

 

Features

• 6A, 100V

• rDS(ON) = 0.600Ω

• Single Pulse Avalanche Energy Rated

• SOA is Power Dissipation Limited

• Nanosecond Switching Speeds

• Linear Transfer Characteristics

• High Input Impedance
 
 
download datasheet

2n5551 pinout

transistor pinout

2n5551 pinout

1- emitter

2- base

3- collector

2N5551, TO-92 Plastic-Encapsulate Biploar Transistors

2N5551, NPN EPITAXIAL PLANAR SILICON HIGH VOLTAGE TRANSISTOR

2N5551, TECHNICAL SPECIFICATIONS OF NPN EPITAXIAL PLANAR TRANSISTOR

2N5551, Transistor General Purpose TO-92

class d audio amplifier

class d audio amplifier
A Class D audio amplifier is basically a switching amplifier or PWM amplifier. There are a number

of different classes of amplifiers. This application note takes a look at the definitions for the main
classifications.


Class D Amplifier
A Class D amplifier or switching amplifier is an electronic amplifier which, in contrast to the active resistance used in linear mode AB-class amplifiers, uses the switching mode of transistors to regulate power delivery. The amplifier, therefore, features high power efficiency (low energy losses), which additionally results in lower weight by eliminating bulky heat sinks. Additionally, if voltage conversion is necessary, the on-the-way high switching frequency allows the bulky audio transformers to be replaced by small inductors. Low pass LC-filtering smoothes the pulses out and restores the signal shape on the load.


Class D Audio Amplifiers
Class D amplifiers, first proposed in 1958, have become


increasingly popular in recent years. What are Class D amplifiers?

How do they compare with other kinds of amplifiers? Why is

Class D of interest for audio? What is needed to make a “good”

audio Class D amplifier? What are the features of ADI’s Class D

amplifier products? Find the answers to all these questions in the

following pages.
 
 
UM10155 Discrete Class D High Power Audio Amplifier
Class D Audio Amplifier, Universal Class D, UcD, PWM Audio Amplifier, .... The ' High Power Class D Audio Amplifier Demonstrator Board.
 
 
Class D Audio Amplifier Output Filter Optimization
This application note examines the effect of the output filter on audio Class D amplifier performance. Switch-mode amplifiers such as the MAX4295 and MAX4297 offer improved efficiency over their more traditional Class AB counterparts. By understanding the operation of these devices, the modulation noise spectrum and the loudspeaker loads they are required to drive, it is possible to completely eliminate the output filter while retaining the efficiency benefits of Class D amplifiers.
 
 
 
How Class D audio amplifiers work
A Class D audio amplifier is basically a switching amplifier or PWM amplifier. There are a number of different classes of amplifiers. We will take a look at the definitions for the main classifications as an introduction.
 
 
 
Class D Audio Amplifiers - Theory and Design
A completely new technology for audio amplification has been evolving during the last 15-20 years that has a clear benefit over current widespread Class-A, and AB topologies. We are talking about the so-called “Class-D”. This benefit is mainly its high power efficiency. Figure 1 shows typical efficiency curves vs. Output power for Class-B and Class-D designs.
 
 
 
170W Class D Audio Amplifier Solution
The LM4651 is a fully integrated conventional pulse width modulator driver IC. The IC contains short circuit, under voltage, over modulation, and thermal shut down protection circuitry. The LM4651also contains a standby function which shuts down the pulse width modulation minimizing supply current. The LM4652 is a fully integrated H-bridge power MOSFET IC in a TO-220 power package. The LM4652 has a temperature sensor built in to alert the LM4651 when the die temperature of the LM4652 exceeds the threshold. Together, these two IC's form a simple, compact high power audio amplifier solution complete with protection normally seen only in Class AB amplifiers. Few external components and minimal traces between the IC's keep the PCB area small and aids in EMI control.
 
 
 

rg6 cable

rg6 cable

RG-6/U is a common type of coaxial cable used in a wide variety of residential and commercial applications. The term "RG-6" itself is quite generic and refers to a wide variety of cable designs, which differ from one another in shielding characteristics, center conductor composition, and dielectric type. RG-6 was originally a military spec where "RG" meant Radio Guide and "6" referred to the sixth page in the Guide, but is now obsolete; in practice, the term "RG-6" is generally used to refer to coaxial cables with an 18 AWG center conductor and 75 ohm characteristic impedance.



RG6 Coaxial Cable


RG6 is the recommended coaxial cable for distributing signals from cable TV, satellite dish or from a roof-top antenna. The RG6 cable construction provides better sheilding than the older RG59 coax cable. RG6 cables that we carry are triple or Quad Shielded. Available in 500 and 1000 foot lengths, Belden RG6 cables also have additional Duobond Plus/Duofoil features that make them the industry leaders.



What Does "RG-6" Mean?
All of the common RG designations apply to various types of coaxial cable. Some people think "coax" or "coaxial" cable means "antenna cable," or "cable with F-connectors," or some such thing, but coax is a much more general classification. Any cable which has two conductors which share a single common axis is a coaxial cable--a center conductor, accompanied by a shield, the two being kept apart by a dielectric and wrapped in an outer jacket. All common video cable types are coaxial cables, though that's harder to see in some than in others--for example, s-video cable typically is two mini-coaxial cables combined either in a common outer jacket or a zip-cord type arrangement.



75 Ohm Braided Coax Cable
RG6 Cable is the preferred cable for transmitting signals from a cable TV, satellite dish or from a roof-top antenna. RG6 cable construction provides for better shielding than RG59 cable. Losses shown are per 100'.


Double-Shielded RG6 Coax Cable, 1000 Feet
Terminating RG6 and RG6 Quad coaxial cable has never been easier. With the Weatherproof Compression Tool Set, you can quickly relocate cable TV/cable modem outlets, replace faulty F connectors or install and repair your satellite TV. The Weatherproof Compression Tool Set lets you make professional-quality terminations easily. This HDTV-compatible set includes a compression crimp tool, a cable cutter, a cable stripper for RG6 and RG6 Quad coax, and 10 waterproof compression connectors that are safe for both indoor and outdoor use.



RG-6 products available on the market
RG-6 cable is one of the more common types of coaxial cables used for commercial and household purposes. The term RG-6 is a generic label that can be used to describe a whole range of cable designs. In fact, all cable designs described under RG-6 may well differ from one another in center conductor composition, dielectric type, or shielding characteristics. RG-6 was originally a military specification meaning Radio Guide, but this term has become obsolete due to lack of use. Today it is used to describe coaxial cables with 75-ohm impedance and 18 AWG center conductors.



HDTV Antenna Coaxial Cable

Antennas Direct offers three types of cable: RG6,Quad-Shielded RG6, and RG11. You can see above the difference in quality, cable-width, and connector-type. If you're installing an indoor antenna or a short outdoor run, a standard RG6 cable should meet your needs. The quad-shielded RG6 cable features additional foil shields to fight electromagnetic interference and is ideal for longer runs. For those that demand the highest quality with virtually no signal loss and/or a run of more than 850 feet, the RG11 will deliver superior performance.


What Is an RG6 Cable Used For
An RG6 cable is one of the most commonly used cables for home and commercial purposes. It is a form of coaxial cable used to transmit audio and video signals to devices such as television sets.
An RG6 cable is used to connect devices that carry audio and video signal from a transmitter to a display. This includes connecting aerial antennas, satellite dishes and cable television.

Waterproof MP3 Player

How to Make a Waterproof MP3 Player
How to Make a Waterproof MP3 Player -

I always wanted a waterproof music player! So I deside to make myself. With the cheap MP3 player, YP-U3.


SwiMP3 Waterproof MP3 Player
Adding Music to the Water

MP3 players have become extremely popular in the last decade. However, the pleasure of enjoying high quality mp3 files during exercise had been confined only to land sports. Determined to provide workout music for swimmers to enjoy as well, The FINIS Development Team set out to create a personal waterproof mp3 player that transmitted the best sounding music. After nearly 2 years of research and development, the first SwiMP3 prototype was created in 2004. A year later, the revolutionary SwiMP3 was released into the market and was quickly regarded by TIME Magazine as one of the top inventions for 2005.

refurbished mp3 player

refurbished mp3 player


Refurbished MP3 players are the best kept secret since Area 51. Everyone loves ipods and other MP3 players and would love to have at least 2 but some of them are a little pricey. I see people jogging with an MP3 player strapped to their arm. You'll see them everywhere, malls, grocery stores, restaurants, sporting events, etc. People cannot go out without their favorit MP3 player.




If you are wanting one of two but don't want to spend a couple hundred dollars, then here is a secret that most people don't know about. It's called refurbished MP3 players or refurbished Shuffle or refurbished ipods.



I know, now you're wanting to know what a refurbished MP3 player is right? Most people think refurbished MP3 players are defective or broken MP3 players but this is far from the truth. They are not broken or damaged or defective or factory seconds. Refurbished means that the item was returned to the store for some reason. It could have been any reason, like wrong color, scratched, missing parts or manual, got a better price some where else, wrong model, don't like it or don't want it now. There are thousands of reasons why people return items. You just never know and that does not matter. It does not matter if the MP3 player was broken or scratched. And here is why.



Once the MP3 player has been returned to the retail store, it is sent off to a repair station. It is then tested thoroughly. If it fails any test, it is repaired with new parts and tested again. Everything has to pass or it is not sold. Once the MP3 player passes all tests it is returned to the retail store and marked and sold as "refurbished". Returned MP3 players can never be sold as new MP3 players, it is against the law. These repaired or returned MP3 players are sold at a discount because they are refurbished.



Refurbished MP3 players are actually new MP3 players and come with a full factory warranty. They work just like new and look like new too. Just because of the law, they cannot be sold as new. This is great for the consumer because you can save 50% or more on all refurbished MP3 players. I bought a refurbished Shuffle for $30. New Shuffle iPods typically retail for $79.



If you are in the market for a MP3 player than check out refurbished MP3 players. You can save 50% or more. You can get 2 for the rpice of one. Refurb MP3 players are hot.

SanDisk Sansa C250 2GB Multimedia MP3 Player (Refurbished)
Enjoy your music and photos on the go with this MP3 player


Digital multimedia device features a 64k color LCD screen to showcase album art and photos

Audio and video apparatus boasts a sleek black color scheme
 
 
SanDisk Sansa Clip 4GB MP3 Player with FM Tuner (Refurbished)
FM Tuner, Voice Recorder - 4GB Flash Memory - Silver
 
 
Sony NW-E305 512MB White Walkman MP3 Player (Refurbished)
Sony MP3 player has a 512MB built-in memory


MP3 player features a built-in FM tuner

1-line organic electroluminescence display

Super quick battery charge

Up to 50 Hours of playback life with rechargeable embedded battery
 
 
 
Sony NW-E005 2GB MP3 Player and FM Tuner (Refurbished)
2GB hard drive stores up to 1350 songs in MP3/ ATRAC3/ WMA or AAC formats


Built-in FM tuner for when you want to listen to the new stuff not yet in your collection

A quick 3-minute charge will provide up to 3 hours of play time
 
 
Sony NWZ-A728 8GB Black Video MP3 Player (Refurbished)
Store up to 1,850 songs or up to 30 hours of video on your Walkman video/mp3 player


Mp3 player boasts an 8 GB memory

Electronic device features a 2.4-inch QVGA LCD screen
 
 
iRiver H10 6GB Lounge Grey MP3 Player/ FM Tuner (Refurbished)
Take your music anywhere with this iRiver H10 MP3 player


Stylish audio device is compact and lightweight

6GB MP3 player also features an FM tuner