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  #1  
قديم 07-26-2010, 11:42 PM
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تاريخ التسجيل: Mar 2010
الدولة: مصر
المشاركات: 5
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new.life is on a distinguished road
افتراضي مجموعة من مشاريع التخرج


speed c**trol Temperature DC fan

Here is a simple circuit based ** two transistors that can be used to c**trol the speed of a 12 V DC fan depending ** the temperature.A thermistor (R1) is used to sense the temperature. **** >

VHF field strength meter

This is a simple and low cost wide band VHF field strength meter. The field strength is measured by c**verting the radio signal to DC and measuring it.
**** >

Teleph**e Hold Project for 2 ph**es in parallel

This Hold Ph**e Circuit will enable you to hang up **e ph**e without losing the c**necti** and move to another room or hall and pick up a different ph**e which is c**nected in parallel and c**tinue your c**versati**. This feature is useful especially when you are staying in a house with different levels and having 2 teleph**es c**nected in parallel. **** >

Ethernet C**troller

This circuit is an ETHERNET c**troller I use the PIC18F452 and the mikroC C Compiler. I use also the JAVA SCRIPT informati** you can get from www.w3school.com I C**trol 8 outputs throw the WEB and transfer time informati** also. **** >

USB sound card

Designing and building a USB sound card is no l**ger a head ache because we have got the PCM 2702 integrated circuit from Texas Instruments. The PCM2702 is an integrated 16 bit digital to analog c**verter that has two digital to analog output channels. The integrated interface c**troller of PCM2702 is compliant to the USB 1.0 standards. **** >

USB Lamp circuit.

Here is a simple USB powered lamp that can be used to light your desktop during power failures. The circuit operates from the 5 V available from the USB port.The 5V from the USB port is passed through current limiting resistor R2 and transistor Q1. The base of transistor Q1 is grounded via R1 which provides a c**stant bias voltage for Q1 together with D2.The diode D1 prevents the reverse flow of current from battery.C1 is used as a noise filter.Two white LED’s are used here for the lamp, you can also use a 2 V torch bulb instead of LED’s. LED D3 indicates c**necti** with USB port. **** >

Fire alarm circuit

Many fire alarm circuits are presented here,but this time a new circuit using a thermistor and a timer to do the trick. The circuit is as simple and straight forward so that , it can be easily implemented.The thermistor offers a low resistance at high temperature and high resistance at low temperature. This phenomen** is employed here for sensing the fire. **** >

simple code lock

The circuit described here is of an electr**ic combinati** lock for daily use. It resp**ds **ly to the right sequence of four digits that are keyed in remotely. If a wr**g key is touched, it resets the lock. **** >

Multipurpose Circuit for teleph**e

This add-** device for teleph**es can be c**nected in parallel to the teleph**e instrument. The circuit provides audio-visual indicati** of **-hook, off-hook, and ringing modes. It can also be used to c**nect the teleph**e to a CID (caller identificati** device) through a relay and also to indicate tapping or misuse of teleph**e lines by sounding a buzzer. **** >

Mains Powered White LED Lamp

Did it ever occur to you that an array of white LEDs can be used as a small lamp for the living room? If not, read **. LED lamps are available ready-made, look exactly the same as standard halogen lamps and can be fitted in a standard 230-V light fitting. We opened **e, and as expected, a capacitor has been used to drop the voltage from 230 V to the voltage suitable for the LEDs. This method is cheaper and smaller compared to using a transformer. The lamp uses **ly 1 watt and therefore also gives off less light than, say, a 20 W halogen lamp. **** >


Sine Wave Generator with 1KHz Frequency

This simple circuit has been designed to generate sine waves with a frequency of 1 KHz while featuring low distorti** and low output impedance until 1 V RMS as it obtains power from batteries. **** >

Electr**ically Lock for door by keybad

The circuit was c**structed to provide a simple electr**ic lock system based ** a single integrated circuit and will require a code of seven digits. **** >


Automatic speed-c**troller for fans and coolers

During summer nights, the temperature is initially quite high. As time passes, the temperature starts dropping. Also, after a pers** falls asleep, the metabolic rate of **e’s body decreases. Thus, initially the fan/cooler needs to be run at full speed. As time passes, **e has to get up again and again to adjust the speed of the fan or the cooler. **** >


Voice Bell

This circuit c**sists of two parts as shown in the figure. The upper circuit should be assembled in a box al**g with regulated 9V power supply (not shown in figure), while lower circuit may be assembled ** a small general purpose PCB and fixed inside the doorbell switch enclosure. C**nect points A and B of **e module to the similar points of the other, using a simple 2-core electric cable. The polarity need not be adhered to, because the bridge rectifier used inside the switch circuit automatically ensures proper polarity. **** >


Police Car Lights with LEDs

This circuit is used to simulate the police car lights by alternating flashing strobes seen ** British police cars. The IC1a forms a square wave oscillator having adjustable frequency with VR1 to give the best effect. **** >


LC meter, Coil Capacitor meter

This LC meter circuit can measure coils and capacitors. When Lx or Cx is c**nected in the circuit the oscillator frequency will decrease and this decrease is measured by a frequency-voltage c**verter build with T3 and T4. To adjust this lc meter circuit with P1 and P2. LC meter precisi** is 3%. **** >


Fridge door Alarm

This fridge door alarm is using a 3V battery supply should be placed (in a small box) in the fridge near the lamp or close to the opening. With the door closed the photo resistor R2 presents a high resistance (>200K) thus clamping IC1 by holding C1 fully charged across R1 and D1. **** >


Toggle ** / OFF Switch

This project describes how to build a “soft touch” switch. By “soft touch” we mean that you have to push **ce to set device ** and push again to set device OFF. This kind of switch works by latching a relay to ** state with push of a butt** and with another push latch is released. It is working like flip-flop states. In that way you can c**trol power to a device using **e push butt**. **** >


power supply failure alarm

Most of the power-supply failure indicator circuits need a separate power-supply for themselves. But the alarm circuit presented here needs no additi**al supply source. It employs an electrolytic capacitor to store adequate charge, to feed power to the alarm circuit which sounds an alarm for a reas**able durati** when the mains supply fails. **** >


Mobile bug

This handy, pocket-size mobile transmissi** detector can sense the presence of an activated mobile ph**e from a distance of **eand- a-half metres. So it can be used to prevent use of mobile ph**es in examinati** halls, c**fidential rooms, etc. It is also useful for detecting the use of mobile ph**e for spying and unauthorised video transmissi**. **** >



IR light dimmer


This is a very simple IR light dimmer that you will wish to have so**er or later, especially those who are lazy enough to get up and turn off the lights.
**** >

FM Teleph**e Bug

Here is a simple transmitter that when c**nected to a ph**e line, will transmit anything ** that line (execpt the dial t**e) to any FM radio. The frequency can be tuned from 88 to about 94Mhz and the range is about 200 feet. It is extremely easy to build and is therefore a good, useful beginner project. **** >


PC Temperature C**troller

Here is a simple temperature c**troller that turns your pers**nel computer (PC) off when the temperature of the PC increases bey**d the optimal temperature value. Some of the larger integrated circuits become quite hot and if the temperature inside the PC becomes too high, these devices may not be able to dissipate heat fast enough. This, in turn, could lead to failure of devices and eventually of the PC. **** >


Servo Motor C**troller

This is the simple basic design of Servo pulse generator. It uses the CMOS IC 7555 in the Astable mode to generate pulses to drive the servo motor. The circuit can be suitably modified to get pulses of sufficient length. **** >


Infra Red Wireless Door M**itor

This door m**itor project uses an infrared beam to m**itor door & passageways or any other area. When the beam is broken a relay is tripped which can be used to sound a bell or alarm. Suitable for detecting customers entering a shop, cars coming up a driveway, etc. The IR beam is very str**g. Distances over 25 feet can be m**itored. A 12VDC supply is required to power the circuit. A 12V wall adaptor is fine. Provisi** has been made so that **ly **e power supply needs to be used to power both units. The relay is rated to switch mains voltages. **** >


4 Watt FM Transmitter

This is a small but quite powerful FM transmitter having three RF stages incorporating an audio preamplifier for better modulati**. t has an output power of 4 Watts and works off 12-18 VDC which makes it easily portable. It is the ideal project for the beginner who wishes to get started in the fascinating world of FM broadcasting and wants a good basic circuit to experiment with. **** >


Simple Solar Lamp

Here is the simple soluti** to make an automatic Solar powered lamp. It automatically switches ** two high power White LEDs in the evening and stays ** for 6 hours using a 6 volt 4.5 Ah rechargeable battery. **** >


CURRENT SENSOR

High-wattage appliances like electric ir**s, ovens and heaters result in unnecessary power loss if left ‘**’ for hours unnoticed. Here is a circuit that senses the flow of current through the appliances and gives audible beeps every fifteen minutes to remind you of power-’**’ status. **** >


Intercom circuit wireless

If you compare this intercom circuit to modern FM and wireless designs, you will certainly sau it outoded. The intercom schematic fulfills its tasks – to provide a reliable communicati** line and is very simple to c**struct. The circuit is made up of an amplifier, two switches and two loudspeakers. **** >


Liquid Crystal Display


An LCD basically c**sists of two glass plates with some liquid crystal material between them. The LCD has an electrically c**trolled light polarising liquid trapped in cells between two transparent polarising sheets. The polarising axes of the two sheets are aligned perpendicular to each other. Each cell in the LCD has electrical c**tacts that permit an electric field into the liquid present inside the LCD cell. **** >

Spy Ear

what binoculars do to improve your visi**, this pers**al sound enhancer circuit does for . This lightweight gadget produces an adjustable gain ** sounds picked up from the built-in high-sensitivity c**denser microph**e. So you can hear what you have been missing. With a 6V (4×1.5V) battery, it produces good results. **** >
Mobile Ph**e Travel Charger

Here is an ideal Mobile charger using 1.5 volt pen cells to charge mobile ph**e while traveling. It can replenish cell ph**e battery three or four times in places where AC power is not available. **** >
Window Switch Sensor Based ** Temperature

The circuit has been designed to produce a window switch with the use of a thermistor for the main purpose of sensing temperatures. **** >
Car Anti-theft Guard

Here is an easy-to-build car anti-theft guard. **** >
Teleph**e ringer

using modulated rectangular waves of different time periods, the circuit presented here produces ringing t**es similar to those produced by a teleph**e. **** >
Audio level indicator



The audio level indicator described here is quite simple and utilises readily available ICs. The functi** of the circuit can be understood with reference to Fig. 2 which shows two c**centric circles formed by red and green LEDs respectively. **** >
Mini UPS system

This circuit provides an uninterrupted power supply (UPS) to operate 12V, 9V and 5V DC-powered instruments at up to 1A current. The backup battery takes up the load without spikes or delay when the mains power gets interrupted **** >
Thermometer – Nokia 3310 Lcd

Use parts of an old or broken mobile ph**e? Why not!
**e useable part of a mobile ph**e is its LCD, which can be used in many applicati**s where we need data visually presented. we can use it as digital Thermometer **** >
Fast Charger

Here is a High current charger for Fast charging sealed lead acid batteries used in Automobiles, Inverters etc. This charger can give 5 Ampere current for quick rejuvenati** of the battery. It uses an Adjustable voltage regulator so that 6 volt and 12 volt batteries can be charged. **** >
universal high resistance voltmeter

This circuit can be used for measurement of DC, AC RMS, AC peak, or AC peak-to-peak voltage. **** >


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  #2  
قديم 11-29-2010, 01:46 PM
عضو فعال
 
تاريخ التسجيل: Nov 2010
الدولة: دمنهور-البحيرة-مصر
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mohamed_Nowar is on a distinguished road
افتراضي

أحث pdf switchgear protecti** and power systems S.Rao free download


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  #3  
قديم 03-16-2011, 07:46 PM
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تاريخ التسجيل: Mar 2011
الدولة: الدمام
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الفارس الجوال is on a distinguished road
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جزاكم الله كل خير


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  #4  
قديم 05-13-2011, 09:10 PM
الصورة الرمزية aliabosta
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تاريخ التسجيل: May 2011
الدولة: الاردن
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aliabosta is on a distinguished road
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جزاكم الله كل خير


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  #5  
قديم 09-18-2011, 11:24 AM
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تاريخ التسجيل: Sep 2011
الدولة: UAE
المشاركات: 67
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michael.tharwat is on a distinguished road
افتراضي

thanks


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