All Handphone Schematic

NOKIA N95 HARDWARE REPAIR

How to make PCB ( Printed circuit board )

How to make the following PCB's experience is the most practical way, besides the cost is cheap, the results are equally interesting and neatly than with how to write directly with a permanent marker, Sablon (Rugos or stencil paint), or media use Transfer Paper (original) the price is quite expensive.
Most people are probably already familiar with this method, but for those who have not used it never hurts to try, especially when the path is now designing the PCB has been very easy to

Bicycle dynamo powered mobile phone charger

Cheap mobile phones Nokia launched four new models, and a dynamo powered mobile phone charger homemade bike first, to help protect its dominant market share in emerging markets.

Nokia controls over 50 percent of sales of mobile phones in India and Africa and has strong positions in new markets.

"Tens of millions of these products will be sold, but the competition becomes more intense because the

a Fire Alarm Circuit

When a fire broke out at room temperature increases. It is very compact and low cost fire alarm senses fire based on this fact.
BC177 transistor (Q1) is used as a sensor fire here. As the temperature increases transistor leakage current is also increased. This circuit is designed so that when there is increased leakage currents Q1, transistor Q2 will be biased. As a result there is a fire escape when the transistor Q2 will be in. The emitter of Q2 (BC 108) is connected to the base Q3 (AC 128). Thus, when Q2 is ON Q3 will also be ON. Q3 relay drive transistors used to drive the load ie, lights, bells, horns, etc. as an indication of the fire. Diode D1 is used as a diode to encourage free to protect her from the back EMF generated when the relay is activated.

Circuit diagram with Parts list.

Note.

* The preset R1 can be used for the desired temperature level to set the alarm ON.
* This is not an alarm attached, ie: when the temperature around the sensor decreases below the set point the alarm stops.
* The circuit can be supported by using 9V battery or 9V battery eliminator.
* All electrolytic capacitors and must be given a minimum value of 10V.
* Load can be connected through C, NC, NO points of the relay according to your needs.
* The calibration can be done by using soldering iron, and thermo-meter. Switch ON the power soldering iron tip supply.Keep near Q1. The same time keep the thermometer close to it. When the temperature reaches the desired value to adjust R1 so that you will relay ON

Mainboard

Mainboard is a place where the CPU components in the mix! mainboard is very important because if there is no computer mainboard it will not be created!
Motherboard or collectively, the Parent Board serves to place all the major instruments such as the CPU.
motherboard form an electronic circuit board. The motherboard is the place passed thatched data. The motherboard connects all the computer equipment and make it work together so that the computer running smoothly.

Know Your Electronic Equipment

electronic devices in general is divided into 2 parts, components
active and passive components.
Passive components include:
1. Resistor
Resistor or resistance is also called an object that can conduct electricity, but the current is difficult to flow. as in a series of aircraft electronics:
* The flow of electricity
* Dividing the voltage
* Zoom out and zoom in voltage
* Parallel distributor
* Low vibration generator
* For loadbearing

2. Inductor
Inductor is a coil of litz wire windings on a core and packaged like resistors or capacitors and resistors is known as reading, namely reading the color code.
Types of inductors on a color TV using wire windings transformer email is playback, IF transformer, switching transformer, line filter, Yoke.
3.Kapasitor
Capacitor or condenser is also called component that can store energy in a certain time without chemical reaction. Capacitor there are two types, namely ignition and non-polar polar.
So passive components generally divided into three parts. namely: resistor, inductor, capacitor.
Active components include:

1. Diode.

There are many types of diodes in the market, but on TV rectifier diodes are generally used, made from
silicon and germanium, LED, and the zener diode.
2.Transistor.
Transistor consists of 2 types, namely PNP and NPN.
3.IC (integrated circuit)
IC is divided into 2 types too, which is monolithic and hybrid

Elactronic Devices and Circuits for Frequency Modulation

Alesis Multimix 16 USB 2.0 and Edirol M16DX

Edirol is a reliable well-established brand for home recording products business. In addition to good quality, well supported with affordable price. M16DX Series is one of the products launched by Edirol, which is a kind of digital mixer provides 18 channels Input and 2 Output Analog-Digital. This mixer is suitable for home recording applications or personal recording.

To create a kompuer a recording studio, we just need at least an enhancement course. Equipment that is what we know now familiar with the name converter. This converter is also growing with a more modest appearance, but capable of becoming well. So if we must do the installation is relatively difficult for the lay computer, then with a USB connection, it does not need to be done. Simply by connecting the computer and the converter via a USB cable, then everything settled soon. Windows XP-based computer will be automatically detects hardware that we connect.

Electronic Circuits board from hardisk

All hard drives have the logic board. Boar logic is in charge of electronic circuit controls the spindle drive, head actuator and manage data traffic.

Electronic devices and Circuits from Sharp

Electronic Dictionary from SharpSharp is the RD-CM1 an electronic dictionary with a 4.1 inch touch screen, SDHC slot (8GB SDHC card), more than 130 volumes, including videos, TTS (Text to Speech) and support basic PMP features such as the ability to play the file formats Xvid, Mpeg4 , MP3, AAC, JPG, BMP, GIF and PNG and eBook reader. but unfortunately this new product is only sold in Korea alone.

Electronic Circuit For printed circuit board definition

A rigid, flat board that holds chips and other electronic components. The board is made of layers, typically two to 10, that interconnect components via copper pathways. The main printed circuit board (PCB) in a system is called a "system board" or "motherboard," while smaller ones that plug into the slots in the main board are called "boards" or "cards." See flexible circuit.

Etched Circuits
The "printed" circuit is an etched circuit. A copper foil is placed over a fiberglass or plastic base of each layer and covered with a photoresist. Light is beamed through a negative image of the circuit paths onto the photoresist, hardening the areas that will remain after etching. When passed through an acid bath, the unhardened areas are washed away. The finished layers are then glued together. A similar process creates the microminiaturized circuits on a chip (see chip).

Starting in the 1940s
Printed circuits were first used in the 1940s to connect discrete components together. By the 1960s, PCBs were widely used in all electronic systems, but still mostly connecting discrete components. Integrated circuits (chip) were emerging and added to the boards, and by the 1980s, PCBs were holding large quantities of chips. Today, printed circuit boards typically connect mostly chips with only a few discrete components, each chip containing from a few thousand up to hundreds of millions of transistors. See surface mount, via, discrete component, chip, card and motherboard.


The motherboard is the primary printed circuit board in a computer. The drawing at the top shows a Baby AT style motherboard in a PC. The adapter cards plug into the expansion slots on the motherboard.

Electronic Circuit for 555 Monostable Circuit

Detailed history of the 555 Timer with its internal construction.

Monostable and Astable circuits. Dark detector, Power alarms. Tilt switch. Electric eye alarm. Metronome. Timer. Schmitt triger. Morse code oscillator. Morse code monitor. Two tone speaker. Heads and tails.

Electronic Circuit Radar Detector

The microwave diodes are chopper-gated by a multivibrator so the RF signal level can be detected by an audio frequency amplifier
Here should be the picture of the antenna

electronic circuit Passive Mixer

Generally you want any mixing circuits to be active (i.e. to include opamp or transistor components to match and balance the inputs). However, you can squeak by in some cases with a passive mixer. Although the passive design can load down the input devices, it will work fine in many cases.

Here we are going to use an audio taper pot for each input channel:

electronic circuit Tone

You can also use a pot and a handful of components to build a simple tone control that you can retrofit into any pedal that lacks one. Look at the following drawing:

The input accepts the signal. It passes through a R1 and C1 which form a filter network. R2 and C2 form the other side of the network. (Note the different component values). As you move the pot shaft, more signal is sent to one side or the other of the tone network. The wiper of the pot (lug 2) is the output. This is a simplified explanation of the tone control, but it shows how the wiper allows you “shift” the signal from one side of a circuit to another.

Electronic Circuit mixer with 3 line inputs and 3 mic inputs

A simple mixer with 3 line inputs and 3 mic inputs using commonly available parts.
The mixer circuit above has 3 line inputs and 3 mic inputs.
The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series resistor. As with any mixer circuit, a slight loss is always introduced. The final summing amplifier has a gain of 2 or 6dB to overcome this. The Input line level should be around 200mV RMS. The Pinouts for LM741, LF351 ,TL071 and NE5534 are shown below. Pinouts for other IC's can be found on the

Electronic Circuit 2-INPUT AUDIO MIXER

The mixer consists of two transistor-based preamplifiers. The first one (designated "Mike in") offers higher gain. it works well with a regular dynamic microphone. The second one can be used to control audio input from a tape recorder/CD player.

Electronic Circuit Adjustable Timer Project

Circuit diagrams show the connections as clearly as possible with all wires drawn neatly as straight lines. The actual layout of the components is usually quite different from the circuit diagram and this can be confusing for the beginner. The secret is to concentrate on the connections, not the actual positions of components.


The circuit diagram and stripboard layout for the Adjustable Timer project are shown here so you can see the difference.


A circuit diagram is useful when testing a circuit and for understanding how it works. This is why the instructions for projects include a circuit diagram as well as the stripboard or printed circuit board layout which you need to build the circuit.

10 Watt Power Amp circuit