25-06-2011, 08:37 PM
hey, can u mail me the details (report) of this project tomorrow?...
thanks...
my email ad: leyn_sy25[at]yahoo.com
thanks...
my email ad: leyn_sy25[at]yahoo.com
25-06-2011, 08:37 PM
hey, can u mail me the details (report) of this project tomorrow?...
thanks... my email ad: leyn_sy25[at]yahoo.com
30-08-2011, 03:14 PM
digilockasm.zip (Size: 17.46 KB / Downloads: 46) This a simple project with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy for an intruder to break the lock unless you keep the code simple. The input is taken from a 4×3 Keypad (please see the schematic for more information) and Display the user input on a 2×16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration i have connected an LED to that pin.
30-08-2011, 03:36 PM
Digital Code Lock Schematic.pdf (Size: 19.25 KB / Downloads: 448) Security is a prime concern in our day-today life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The microcontroller based digital lock for Doors is an access control system that allows only authorized persons to access a restricted area. The system is fully controlled by the 8 bit microcontroller AT89C2051 which has a 2Kbytes of ROM for the program memory. The password is stored in the EPROM so that we can change it at any time. The system has a Keypad by which the password can be entered through it. When the entered password equals with the password stored in the memory then the relay gets on and so that the door is opened. If we entered a wrong password for more than three times then the Alarm is switched on.
11-12-2011, 07:07 PM
I am in need of full document for digital code lock using AT89C2051
30-01-2012, 01:57 PM
digital code lock
batch 9 madhukar.ppt (Size: 812.5 KB / Downloads: 107) .LCD:- LCD is finding wide spread use replacing LEDs (seven segment LEDs or other multi segment LEDs) A model described here is for its low price and great possibilities most frequently used in practice. It is based on the microcontroller and can display messages in two lines with 16 characters each Features Diffused Junction Low Forward Voltage Drop A High Current Capability High Reliability High Surge Current Capability B Ideal for Printed Circuit Boards voltage regulator The MC78XX series of three terminal positive regulators are available in the TO-220/D-PAK package and with several fixed output voltages, making them useful in a wide range of applications. 4 Matrix Keyboard 4*4 matrix keyboard is used to enter password and to control devices, 4*4 matrix keyboard requires only 8 I/O lines, where as the line keyboard requires 16 I/O lines digital code lock batch 9 madhukar.ppt (Size: 812.5 KB / Downloads: 107) .LCD:- LCD is finding wide spread use replacing LEDs (seven segment LEDs or other multi segment LEDs) A model described here is for its low price and great possibilities most frequently used in practice. It is based on the microcontroller and can display messages in two lines with 16 characters each Features Diffused Junction Low Forward Voltage Drop A High Current Capability High Reliability High Surge Current Capability B Ideal for Printed Circuit Boards voltage regulator The MC78XX series of three terminal positive regulators are available in the TO-220/D-PAK package and with several fixed output voltages, making them useful in a wide range of applications. 4 Matrix Keyboard 4*4 matrix keyboard is used to enter password and to control devices, 4*4 matrix keyboard requires only 8 I/O lines, where as the line keyboard requires 16 I/O lines
18-02-2012, 04:42 PM
to get information about the topic digital code lock full report ppt and related topic refer the link bellow
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26-02-2012, 11:18 AM
i want a ppt about this title "digital code lock full report"
05-03-2012, 10:17 AM
to get information about the topic digital code lock full report ppt and related topic refer the link bellow
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19-03-2012, 12:33 PM
please send us full project report on digital control system micro controller based 8051.
thank you please send full project report on digital code lock system
19-03-2012, 03:48 PM
digital code lock
DIGITAL CODE LOCK.docx (Size: 735.65 KB / Downloads: 68) INTRODUCTION A digital code lock is a device which has a digital control assembly attached to it by using AT89C51 microcontroller. They are provided with an access control system. This system allows the user to unlock the device with a password. The password is entered by making use of a keypad. The user can also set his password to ensure better protection. A 4x3 matrix keypad and a 16x2 LCD have been used here. Keypad and LCD are very commonly used input & output devices, respectively. A four digit predefined password needs to be specified the user. This password is stored in the system. While unlocking, if the entered password from keypad matches with the stored password, then the lock opens and a message is displayed on LCD. Also an output pin is made high to be used for further purpose. POWER SUPPLY Power supply is used to give 5v regulated constant power to our microcontroller. The main supply is 230v AC which firstly passed through step down transformer. And then after bridge circuit convert it in to DC voltage. Then after voltage regulating IC7805 is used to take 5v constant. Capacitors are joined parallel to circuit to provide more stable DC. And this section is connected to giving a 5v supply for Digital Code Lock. MICROCONTROLLER MODULE I have used AT89C51 IC in this project. And programming is done in assembly language. For assembly programming command prompt is used. And as based on password detector we can use it as security purpose. The connections in the circuit are as following: port P3 of microcontroller AT89C51 is used as data input port which is connected to data pins (7-14) of LCD. P2.5, P2.6 and P2.7 pins of microcontroller are connected to control pins RS, RW and EN of LCD. Port P1.0/3 & p2.0/3 is used to take input from keypad. As the program starts, string ‘Enter New Password’ is displayed on LCD. The keypad is scanned for pressed digits one by one. Every time, row and column of the key pressed is detected and digit is displayed on LCD corresponding to the entered number. After the four digits are entered, the user is prompted to ‘Enter Password’ and again the input is taken through LCD. If the passwords do not match, a message is displayed to indicate ‘Incorrect; otherwise the user is prompted to unlock the device. To unlock, user needs to ‘Enter Password’ through keypad. Again the keypad is scanned for pressed keys and corresponding digits are identified. The passkey is displayed on the LCD screen. After the four digits are entered, they are compared with the pre-set password. If all the four digits match with set password, LCD displays ‘Hi Sir’ and the lock output pin goes high. If the security code is wrong, ‘Incorrect’ is sent to be displayed on LCD and give massage that, how much trial left. The system gets locked if more than three attempts are made with wrong password to open the electronic lock and ‘-CODE BLOCKED-‘massage will display on screen. The system needs to be reset in such a case. REGULATING IC7805 The L78xx Series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output short-circuit current as the voltage across the pass transistor is increased. However, it is recommended that the regulator input be bypassed with capacitor if the regulator is connected to the power supply filter with long lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high frequency characteristics to insure stable operation under all load conditions. A 0.33 μF or larger tantalum, Mylar or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtained with the arrangement is 2 V greater than the regulator voltage.
27-03-2012, 10:05 AM
to get information about the topic "digital code locking system " full report ppt and related topic refer the link bellow
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20-04-2012, 10:13 AM
to get information about the topic full report "future aspects of digital code lock system" ppt and related topic refer the link bellow https://seminarproject.net/Thread-digita...ull-report https://seminarproject.net/Thread-digita...ort?page=4 https://seminarproject.net/Thread-digita...ort?page=2 https://seminarproject.net/Thread-digita...ort?page=3 to get information about the topic full report "future aspects of digital code lock system" ppt and related topic refer the link bellow https://seminarproject.net/Thread-digita...ull-report https://seminarproject.net/Thread-digita...ort?page=4 https://seminarproject.net/Thread-digita...ort?page=2 https://seminarproject.net/Thread-digita...ort?page=3 to get information about the topic full report "future aspects of digital code lock system" ppt and related topic refer the link bellow https://seminarproject.net/Thread-digita...ull-report https://seminarproject.net/Thread-digita...ort?page=4 https://seminarproject.net/Thread-digita...ort?page=2 https://seminarproject.net/Thread-digita...ort?page=3 to get information about the topic full report "future aspects of digital code lock system" ppt and related topic refer the link bellow https://seminarproject.net/Thread-digita...ull-report https://seminarproject.net/Thread-digita...ort?page=4 https://seminarproject.net/Thread-digita...ort?page=2 https://seminarproject.net/Thread-digita...ort?page=3
20-05-2012, 05:02 PM
mail me full working process of this project on sandyindia1[at]gmail.com
its urgent
21-05-2012, 10:38 AM
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29-11-2012, 01:45 PM
digital code lock
digital code.docx (Size: 74.83 KB / Downloads: 27) INTRODUCTION: Every now and then security is a main factor for us. As there are many problems we are fetching till at the primitive age to modern age to protect our property and personal matters which has a great value to us. But these can be stolen or going to another hand without our knowledge if we cannot secure it. So to secure these from stolen or any undesired function many security system have been raised and locking is that security system that has been invented at first. For locking a locking arrangement that is normally known as lock is used to close of anything and a key is used to open the locking system. There are two known type locking system that are available used all over the world 1. Analog Locking system 2. Digital locking system Analog locking system: Analog locking system is that locking system where a key that has a physical extension is used to open the lock. Both the lock and the key are made of materials and physical settings exits between them. When the settings are matched then the lock is opened and the user can enter his desired area. Digital locking system: A digital locking system is locking system in where the digits are used to open the lock of anything and the locking system controlled digitally. In here a combination of digits is used to open the lock. At first analog locking system was invented and till now it is used for locking purpose. But it is not more secure and confidential and it is easy to unlock this by breaking this using another tools. With the improvement of science and technology the necessity of security increased and that was going to be tough to secure anything using analog locking system. So for that reason as an alternation digital locking system is invented to locking anything. In here a combination of digits, letters, switches etc are used to lock and the open the lock. Only the user who know the combination of these are capable of open the lock otherwise not. The combination is normally known as password that is fluently used all over the world. ADVANTAGES: The following advantages are seen in simple low cost digital code lock system 1. It is very simple in construction. 2. It is cheaper than other digital locks. So any one can buy it and permanently used it. 3. It weight is less and that for case it can be used in any remote place and easily bearable. 4. It is perfect for locking that documents which are used all time because it is easy to operate. 5. We can easily change the combination password as we like best at any time on our demand. DISADVANTAGES: The following disadvantages are seen in simple low cost digital lock 1. It cannot be used for that locking system where the security system is too protective for prevent any fault as its password can easily find out by any one at any time. So it is used only for low rated locking system. 2. As many electronic equipments are used so in chip it is difficult to find out where the faults if occurs. 3. It is not a pure digital locking and the switches that are used operate in manually. So it is time consuming. |
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