مرحبا اخواني ما بعرف اذا هذا الموضوع متكرر لكن لفت نظري انا في شباب كانت تتعب في ايجاد فكرة المشروع اكثر من تطبيقه فحبيت انه نتشارك الافكار علشان نمهد الطريق لعمل المشاريع لا لشرائها جاهزة وبارك الله فيكم...............

دعوة من اخوكم فلسطين والنضال

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أتعجب من عدم التفاعل مع موضوع كهذا رغم طول مدة نشره أمام الجميع !!!
على أية حال جزاك الله تعالى خيرآ لحرصك على الافاده

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شكرا اخي محب الله و رسوله وانا قاعد اجمع افكار لمشاريع وان شاء الله راح احطهم ويمكن من بعدها راح الاخوان يشاركوا لانه بصراحة ايجاد فكرة للمشروع مشكلة بحد ذاتها وهذا شوفته مع شباب جامعتي

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WIZnet WiFi-PIC-Bot




This rolling robot harnesses the power of a WIZnet W5100 module, a Microchip Technology DM300027 development board, and a Netgear wireless access hub to control a compact mobile robot. You can easily control the robot via your laptop.m provides useful information such as watering schedules and zone activity.


وللمزيد عن هذا المشروع
Abstract

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The Smart House Security System


The Smart House TCP-based security system features a WIZnet WIZ810MJ module, an ATmega16L microcontroller, a PIR for sensing body heat, a keypad for configuration, and a 2 × 16 LCD. The compact, easy-to-install security system is perfect for small homes and businesses.

وللمزيد
Abstract

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Voice recorder using ADC and microcontroller

voice recorder using ADC and microcontroller.Create a voice recorder using a
PIC or a microcontroller and ADC. Use some conditioning circuits to condition the microphone output and feed it to the ADC. The converted values can be stored in some kind of memory. Samsung has got some nice memory chips that can be easily interfaced. Most modern MP3 players use this kind of memory. Use a DAC to convert the stored voice data back to analog format and play it through a speaker. If you feel that this is very simple for you then interface a keyboard and LCD display and make it look like a real voice recorder. Give options to change the storage format, like bit rate, frequency etc. Still you are not satisfied…… then use an ARM processor to implement this. Convert the voice to MP3 in real time and store the Mp3 data. Also write code to play back the stored Mp3.

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GSM CONTROLLED DOOR LATCH OPENER WITH SECURITY AUTODIAL-UP

THE SAID PROJECT IS DESIGNED ON THE DTMF DECODING.OUR MODERN TELEPHONE AND EVEN OUR MOBILE PHONE USES DTMF CODING FOR NUMBER DIALING. THESE DTMF CODES CAN BE DECODED AND UTILISED FOR USEFUL PURPOSES. THE CIRCUIT UTILISES IC8870 FOR DTMF DECODING . MICROCONTROLLER 89C51 READS THESE CODES AND TAKES THE NECESSARY ACTION. DOOR LATCH CAN BE OPENED BY ENTERING THE CORRECT PASSWORD , YOU CAN ALSO CONNECT SECURITY SENSORS OF YOUR CHOICE ,IN CASE OF ANY BREACH OF SECURITY TAKES PLACE , THE DEVICE WILL DIAL OUT THE PRESTORED NUMBER AND DELIVERS AN EMERGENCY MESSAGE.
CIRCUIT DESCRIPTION: TELEPHONE LINE IS CONNECTED AT CONNECTOR K1. WHENEVER SOMEONE CALLS THIS NUMBER, THAT TIME TELEPHONE LINE CARRIES ABOUT 70V RINGING SIGNAL SIGNAL IS RECTIFIED BY THE BRIDGE D5-D8 AND FILTERED BY C4, R20, AND D9 AND DRIVES AN OPTO COUPLER IC U8 MCT2E . COLLECTOR OF THE OPTOCOUPLER WILL GO LOW WHENEVER BELL RINGS. SINCE THE COLLECTOR IS CONNECTED TO P2.7 OF MICROCONTROLLER 89C51. NUMBER OF TIMES IT GOES LOW IS COUNTED BY MICROCONTROLLER. AFTER SIX TO EIGHT RINGS,P1.0 WILL GO HIGH AND SWITCH ON TRANSISTER T4 AND ENERGISE THE OFF HOOK RELAY RL1 . THE CONTECTS OF RELAY RL 1 WILL BECOME CLOSED AND THE TELEPHONE LINE WILL GET CONNECTED TO DTMF DECODER IC 8870, THROUGH C7 AND C8. RESISTANCE R8 COMES ACROSS THE TELEPHONE LINE AND THAT LOWERS THE VOLTAGE,AND THIS ULTIMATELY SENDS MESSAGES TO EXCHANGE THE USER HAS LIFTED THE HAND SET. AT THE SAME TIME ,MICROCONTROLLER PIN P3.5 WILL TRIGGER THE VOICE IC API8208 WHERE ALL THE MESSAGES ARE STORED. CALLER WILL GET THE MESSAGE”PLEASE INTER THE PASSWARD”THE DEFAULT PASSWORD IS 1-2-3-4-5-6. WHEN CALLER ENTERS THIS 6 DIGIT PASSWORD. IC 8870 DECODES THESE NUMBERS AND BINARY NUMEBRS ARE AVAILABLE AT Q1 TO Q4 ,PIN NO 11-14 OF DTMF DECODER WHENEVER NEW CODE COMES PIN NO 15( STB) OF DTMF DECODER WILL PULSE LOW, AND IS CONNECTED TO P1.1 INFORMING MICROCONTROLLER THAT CODES ARE AVAILABLE PLEASE TAKE THEM . MICROCONTROLLER WILL READS THESE CODES ONE BY ONE, THROUGH ITS LINE P1.2-P1.5. IF THE CODES MATCHES WITH THE CODES INSIDE THE MICROCONTROLLER, MICROCONTROLLER WILL SWITCH ON THE ELECTRO MAGNETIC OPERATED LATCH FOR 10 SECONDS AND USER CAN ENTER THE APARTMENT . IF THE PASSWARD ENTERED IS NOT CORRECT. MICROCONTROLLER WILL DISCONNECT THE TELEPHONE LINE WITHOUT ANY REPLY, BY MAKING P1.0 LOW.
1. IF THE PASSWORD ENTERED IS CORRECT. YOU CAN ALSO CHANGE THE PASSWORD STORED. THIS PASSWORD STORED GOES INTO SERIAL EPROM IC 9346 THAT IS NON VOLATILE RAM IN CASE POWER FAILS THE PASSWORD IS NOT LOST
IF YOU WANT TO CHANGE THE PASSWORD FOLLOW THESE STEPS
DIAL THIS NUMBER FROM OTHER LINE AFTER SIX TO EIGHT BELLS YOU WILL RECEIVE MESSAGE ” PLEASE ENTER YOUR PASSWORD”. (1,2,3,4,5,6 and #)SO YOU ENTER YOUR PASSWORD AND WAIT FOR THE MESSAGE IF YOU ENTER 2 THEN DEVICE WILL RESPOND PLEASE ENTER NEW PASSWORD WHEN YOUR PASSWORD ENTRY IS OVER PRESS # AFTER PASSOWRD ENTRY INDICATE THAT YOUR ENTRY IS OVER AND MICROCONTROLLER WILL RESPOND “YOUR PASSWORD HAS BEEN CHANGED’’ KEEP THE HENDSET BACK ON THE INSTRUMENT FROM WHERE YOU ARE CALLING.NEXT TIME WHEN YOU DIAL ,YOU WILL HAVE TO ENTER YOUR NEW PASSWORD.
SIMILARLY YOU CAN ALSO CHANGE THE TELEPHONE NUMBER.
IC U7 4047 ACTS LIKE WATCHDOG AS LONG COMMUNICATION IS GOING ON IT DOES NOTHING THE MOVEMENT COMMUNICATION IS OVER ITS OUT PUT AT PIN NO 10 CONNECTED TO PIN P3.2-INT0 WILL INTERRUPT THE PROCESSOR AND PROCESSOR WILL MAKE THE P1.0 LOW AND DISCONNECTING TELEPHONE LINE .THE TIME TO SWITCH OFF THE OFF- HOOK RELAY IS DECIDED BY C6 AND R19 CONNECTED TO IC 4047.TRANSISTER T1 AND T2 DRIVES THE LED D12 TO GIVE VISUAL INDICATION OF COMMUNICATION. TRANSFORMER TR1 IS 1:1 TRANSFORMER (160 OHM) PROVIDES ISOLATION BETWEEN TELEPHONE LINE AND SPEECH CIRCUIT.

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This Dummy Alarm project makes an LED flash briefly once every 5 seconds to imitate the indicator light of a real alarm. The circuit is designed to use very little current to prolong battery life so that it can be left on permanently. An on/off switch is not included, but could be added if you wish.
The 7555 timer IC used is a low power version of the standard 555 timer. A 'superbright' red LED is used because this provides a bright flash with a low current. The LED is off for most of the time so the average total current for the circuit is less than 0.2mA. With this very low current a set of 3 alkaline AA cells should last for several months, maybe as long as a year. The circuit will work with a standard 555 timer IC (such as the popular NE555) but this will increase the average current to about 2mA and the battery life will be much shorter. You can use a greater supply voltage (15V maximum) for this circuit but the 1k resistor for the LED should be increased to keep the LED current low at about 3mA. For example to use a 9V PP3 battery change the 1k resistor to 3k3. Note that AA cells will last longer than a 9V PP3 battery.

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MCU: PIC18F2550 with external xtal,
ADC: one channel 0-2.5V sigma-delta converter, Linear Technology LTC2400/LTC2420,
6-channal 10-bit ADC 0-5V,
Display: Two connectors for text LCD or GLCD,
USB: onchip USB port with type B connector,
Power supply: onboard low dropout regulator, rechargeable battery,
Code programming: 10-pin header for In Circuit Loader.

The board platform is suitable for developing the microcontroller based instrumentation. Students may build the signal conditioning board, plugs it to PIC project board, develops the code and programs it with loader cable easily.
Figure 1. PIC18F2550 Project Board (click to enlarge)Figure 2. Text LCD displays analog input.

Hardware

The MCU is 28-pin PIC18F2550 with external xtal as the option. We can use internal oscillator. The loader uses only three pins, PGD, PGC and MCLR. J1 is ICSP header, we can plug it to the application board for both code loading and running. The user I/O ports is 6-channel analog input RA0-RA5. PORTB, RB0-RB7 is for LCD interface. User can choose either text LCD at JR1 connector or GLCD at JF1 connector. PORTC, RC0-RC2 is used to interface the LTC2400/LTC2420 SPI bus, sigma delta converter. RC4 and RC5 is USB port signal. RC6 is also available at J2. RC7 is debug LED. J1 is ICSP header. D2 protects VCC from high voltage programming at MCLR pin. U2 can be 20-bit or 24-bit resolution, sigma-delta converter, LTC2420 or LTC2400. J3 is jumper for selecting rejection of the common mode noise frequency, 50Hz or 60Hz. The reference voltage, +2.5V is generated by U3 LM336. The board can be powered by rechargeable battery, BT1.
Figure 3. Hardware Schematic and BOM

Figure 4. TOP Layer LayoutFigure 5. BOTTOM Layer Layout

Figure 6. Component Layout
Figure 7. PCB with blue solder mask
Sample Code: Interfacing LTC2400

The sample c program shown in Figure 8 demonstrates interfacing to sigma-delta converter, LTC2400. The MCU uses 4MHz Xtal with HS oscillator, no division option. The program reads 24-bit data from LTC2400, performs digital filtering and displays input voltage in 0.1uV unit.
// PIC Project Board// PIC18F2550 + LTC2400 + LCD + USB// Sample code demonstrates the use of sigma-delta converter.// The program prints analog input 0-2.5V on LCD in micro Volts unit// source code was compiled with Mikro-C compiler// Copyright 2006 Wichit Sirichote, kswichit@kmitl.ac.th #define ADC_CS1 PORTC.F0 // output bit#define ADC_SDO PORTC.F1 // input bit#define ADC_SCK PORTC.F2 // output bitchar *text = "PICProject Board";unsigned long x1,x2,x3,x4,x5;/* read 32-bit data from LTC2400 */unsigned long read_ADC1(void) { char k; long n; n= 0; ADC_CS1 = 0; for(k=0; k<32; k++) { n<<= 1; ADC_SCK = 1; n |= ADC_SDO; ADC_SCK = 0; } ADC_CS1 = 1; n&=0x01fffffff; // maskout sign bit n>>=4; // get 24-bit conversion result return n; }/* 5-point moving average */// return data that scaled with reference voltage in uV unitunsigned long filter_ADC(void) { x5 = x4; x4 = x3; x3 = x2; x2 = x1; x1 = read_ADC1(); return ((((x1+x2+x3+x4+x5)/5)*148)/100); // x 149 E-9 convert to 2.479V } void main() { char buffer[20]; long d; ADCON1 = 0x0E; TRISB = 0; // PORTB is output PORTC = 0xFF; TRISC = 0x02; // PORTC.1 is input bit Lcd_Init(&PORTB); // Initialize LCD connected to PORTB Lcd_Cmd(Lcd_CLEAR); // Clear display Lcd_Cmd(Lcd_CURSOR_OFF); // Turn cursor off Lcd_Out(1, 1, text); while(1) { PORTC.F7 ^= 1; d = filter_ADC(); sprintl(buffer,"%08ld x0.1%cV",d,0xe4); Lcd_Cmd(LCD_SECOND_ROW); Lcd_Out_CP(buffer); Delay_ms(200); } }Figure 8. Sample code listing
Download
Schematic and BOMPICprojectboard.pdfC source code and hex filePICProjectBoard.c PICProjectBoard.hex

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وانشاء الله هناك المزيد وارجوا من الجميع المشاركة بافكار اخرى للفائدة والله هذا الموضوع مهم جدا جدا ويارب ما حدا يفشلني

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مافي تفاعل ؟؟؟؟!!!!!

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Automatically lights up during night

*******s

1. Automatic street light (An introduction).
2. Principle
3. Component used
4. About the components.
a) 9V Battery
b) Switch
c) L.D.R
d) I.C 555
e) L.E.D
f) Variable Resistance
g) P.C.B

5. CIRCUIT DIAGRAM
6. WORKING
7. CONCLUSION
8. BIBLIOGRAPHY
Automatic street light
An introduction

Automatic Street light needs no manual operation for switching ON and OFF when there is
need of light. It detects itself weather there is need for light or not. When darkness rises to a
certain value then automatically street light is switched ON and when there is other source of
light i.e. day time, the street light gets OFF. The sensitiveness of the street light can also be
adjusted. In our project we have used four L.E.D for indication of bulb but for high power
switching one can connect Relay (electromagnetic switch) at the output of pin 3 of I.C 555.
Then it will be possible to turn ON/OFF any electrical appliances connected all the way through
relay.

PRINCIPLE:

This circuit uses a popular timer I.C 555. I.C 555 is connected as comparator with pin-6
connected with positive rail, the output goes high(1) when the trigger pin 2 is at lower then
1/3rd level of the supply voltage. Conversely the output goes low (0) when it is above 1/3rd
level. So small change in the voltage of pin-2 is enough to change the level of output
(pin-3) from 1 to 0 and 0 to 1. The output has only two states high and low and can not remain
in any intermediate stage. It is powered by a 6V battery for portable use. The circuit is
economic in power consumption.
Pin 4, 6 and 8 is connected to the positive supply and pin 1 is grounded.
To detect the present of an object we have used LDR and a source of light. LDR is a
special type of resistance whose value depends on the brightness of the light which is falling
on it. It has resistance of about 1 mega ohm when in total darkness, but a resistance of only
about 5k ohms when brightness illuminated. It responds to a large part of light spectrum.
We have made a potential divider circuit with LDR and 100K variable resistance connected
in series. We know that voltage is directly proportional to conductance so more voltage we will
get from this divider when LDR is getting light and low voltage in darkness. This divided voltage
is given to pin 2 of IC 555. Variable resistance is so adjusted that it crosses potential of 1/3rd
in brightness and fall below 1/3rd in darkness.
Sensitiveness can be adjusted by this variable resistance. As soon as LDR gets dark the
voltage of pin 2 drops1/3rd of the supply voltage and pin 3 gets high and LED or buzzer which
is connected to the output gets activated.

Component used

1) 9v Battery with strip
2) Switch
3) L.D.R (Light Depending Resistance)
4) I.C NE555 with Base
5) L.E.D (Light Emitting Diode) 3 to 6 pieces.
6) Variable Resistance of 47 Kilo ohms
7) P.C.B (Printed Circuit Board of 555 or Vero board.

COMPONENTS

a) Battery: For 9v power supply we can use 6pcs dry cell or 6F22 9v single piece battery.
b) Switch: Any general purpose switch can be used. Switch is used as circuit breaker.
c) L.D.R: (Light Depending Resistance) it is a special type of resistance whose value
depends on the brightness of light which is falling on it. It has resistance of about 1mega ohm
when in total darkness, but a resistance of only about 5k ohms when brightness illuminated. It
responds to a large part of light spectrum.
d) L.E.D: A diode is a component that only allows electricity to flow one way. It can be
thought as a sort of one way street for electrons. Because of this characteristic, dioded are
used to transform or rectify AC voltage into a DC voltage. Diodes have two connections, an
anode and a cathode. The cathode is the end on the schematic with the point of the triangle
pointing towards a line. In other words, the triangle points toward that cathode. The anode is,
of course, the opposite end. Current flows from the anode to the cathode. Light emitting
diodes, or LEDs, differ from regular diodes in that when a voltage is applied, they emit light.
This light can be red (most common), green, yellow, orange, blue (not very common), or infa
red. LEDs are used as indicators, transmitters, etc. Most likely, a LED will never burn out like a
regular lamp will and requires many times less current. Because LEDs act like regular diodes
and will form a short if connected between + and -, a current limiting resistor is used to prevent
that very thing. LEDs may or may not be drawn with the circle surrounding them.
e) Variable resistance: (Potentiometer) Resistors are one of the most common
electronic components. A resistor is a device that limits, or resists current. The current limiting
ability or resistance is measured in ohms, represented by the Greek symbol Omega. Variable
resistors (also called potentiometers or just "pots") are resistors that have a variable
resistance. You adjust the resistance by turning a shaft. This shaft moves a wiper across the
actual resistor element. By changing the amounts of resistor between the wiper connection and
the connection (s) to the resistor element, you can change the resistance. You will often see
the resistance of resistors written with K (kilohms) after the number value. This means that
there are that many thousands of ohms. For example, 1K is 1000 ohm, 2K is 2000 ohm, 3.3K is
3300 ohm, etc. You may also see the suffix M (mega ohms). This simply means million.
Resistors are also rated by their power handling capability. This is the amount of heat the
resistor can take before it is destroyed. The power capability is measured in W (watts).
Common wattages for variable resistors are 1/8W, 1/4W, 1/2W and 1W. Anything of a higher
wattage is referred to as a rheostat.
f) P.C.B: (Printed Circuit Board) with the help of P.C.B it is easy to assemble circuit with
neat and clean end products. P.C.B is made of bakelite with surface pasted with copper
track-layout. For each components leg, hole is made. Connection pin is passed through the
hole and is soldered.


WORKING:

When light falls on the LDR then its resistance decreases which results in increase of the
voltage at pin 2 of the IC 555. IC 555 has got comparator inbuilt, which compares between the
input voltage from pin2 and 1/3rd of the power supply voltage. When input falls below 1/3rd
then output is set high otherwise it is set low. Since in brightness, input voltage rises so we
obtain no positive voltage at output of pin 3 to drive relay or LED, besides in poor light
condition we get output to energize.

Precautions:

a) LDR used should be sensitive. Before using in the circuit it should be tested with
multimeter.
b) I.C should not be heated much while soldering, too much heat can destroy the I.C. For
safety and easy to replace, use of I.C base is suggested. While placing the I.C pin no 1 should
be made sure at right hole.
c) Opposite polarity of battery can destroy I.C so please check the polarity before
switching ON the circuit. One should use diode in series with switch for safety since diode
allows flowing current in one direction only.
d) L.E.D glows in forward bias only so incorrect polarity of L.E.D will not glow. Out put
voltage of our project is 7.3 volt therefore 3 LED in series can be easily used with out
resistance.
e) Each component should be soldered neat and clean. We should check for any dry
soldered.
f) LDR should be so adjusted that it should not get light from streetlight itself.

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Heat Sensor:-
Gives tone when there is
change in temperature.
Tips:
* If Thermistor is of PTC type then still you can use it by
interchanging thermistor and 100 Ohms resistance.
* You can use 2 same value thermistor also in place of
replacing 100 Ohms resistance. Then you can use to
compare temperature between two place.

Here is a simple circuit which can be used as a heat
sensor. In the following circuit diagram thermistor and
100 Ohms resistance is connected in series and makes a
potential devider circuit . If thermistor is of N.T.C
(Negative temperature Coefficient ) type then after
heating the thermistor its resistance decreases so more
current flows through the thermistor and 100 Ohms
resistance and we get more voltage at junction of
thermistor and resistance. Suppose after heating 110
ohms thermistor its resistance value become 90 Ohms.
then according to potential devider circuit the voltage
across one resistor equals the ratio of that resistor's
value and the sum of resistances times the voltage
across the series combination. This concept is so
pervasive it has a name: voltage divider.
The input-output relationship for this system, found in
this particular case by voltage divider, takes the form of a
ratio of the output voltage to the input voltage.
vout R2 vout 100
-------= -------- => ------- = ------ =>19 vout=90=>vout=4.73
vin R1+R2 9 190

This output voltage is applied to a NPN transistor through
a resistance. Emitter voltage is maintain at 4.7 volt with a
help of Zener diode. This voltage we will use as compare
voltage.
NPN transistor conducts when base voltage is greater
than emitter voltage. Transistor conducts as it gets more
than 4.7 base Voltage and circuit is completed through
buzzer and it gives Sound.

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HOME
Electronic eye has much use in this electronic age. Also Known as magic eye. It can be used as an automatic guest indicator at the door, If fitted on the bottom of the door entrance. Once it is installed at the door there is no need to install a call bell. It can also be used at homes or in banks as a burglar alarm.
Fix the LDR to the wooden door or a locker to be protected in such a manner that when anybody tries to open it, a shadow falls on the LDR and the circuit gets activated and produce a pleasant sound through the buzzer.
This electronic eye circuit uses NOT gate from CMOS I.C CD 4049. CD 4049 contains 6 independent NOT gate in one package; we have used here (a) one only. NOT gate output goes high(1) when the input pin 3 is at lower then 1/3rd level of the supply voltage. Conversely the output goes low (0) when it is above 1/3rd level. So small change in the voltage of pin-2 is enough to change the level of output (pin-3) from 1 to 0 and 0 to 1. The output has only two states high and low and can not remain in any intermediate stage. It is powered by a 9V battery for portable use. The circuit is economic in power consumption. Pin 1 is connected to the positive supply and pin 8 is grounded.
To detect the present of an object we have used LDR and a source of light. LDR is a special type of resistance whose value depends on the brightness of the light which is falling on it. It has resistance of about 1 mega ohm when in total darkness, but a resistance of only about 5k ohms when brightness illuminated. It responds to a large part of light spectrum.
We have made a potential divider circuit with LDR and 220 KΩ resistance connected in series. We know that voltage is directly proportional to conductance so more voltage we will get from this divider when LDR is getting light and low voltage in darkness. This divided voltage is given to input of NOT gate.
As soon as LDR gets dark the voltage of input not gate drops 1/3rd of the supply voltage and pin 2 gets high and LED or buzzer which is connected to the output gets activated.
Advantage of using Logic gate is that data can be easily send to other digital interface device ie one can easily fed data to computer using parallel port or for further processing .





1. IC CD4049
2. 220 KΩ Resistance
3. 9 V Battery with Snap
4. Switch
5. Buzzer
6. L.D.R
7. L.E.D

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