C Program For Lcd Interfacing With At89s52 MicroPassword Based Circuit Breaker Project Circuit Working. Password Based Circuit Breaker is a simple project that helps in controlling the electrical lines with the help of a password. Nowadays, electrical accidents to the line man are increasing, while repairing the electrical lines due to the lack of communication between the electrical substation and maintenance staff. This project gives a solution to this problem to ensure line man safety. In this proposed system, the control ONOFF of the electrical lines lies with line man. This project is arranged in such a way that maintenance staff or line man has to enter the password to ONOFF the electrical line. Now, if there is any fault in electrical line, then the line man will switch off the power supply to the line by entering password and comfortably repair the electrical line, and after coming to the substation line man switch on the supply to the particular line by entering the password. Separate passwords are assigned for each electrical lines. Before going to know about this circuit, also read the interesting post Password based door locking system. Construction and Output Video. Block Diagram. Block Diagram of Password Based Circuit Breaker. Principle of Operation. The main component in the circuit is 8. In this project 44 keypad is used to enter the password. The password which is entered is compared with the predefined password. If entered password is correct, then the corresponding electrical line is turned ON or OFF. In this project, a separate password is provided to each electrical line. Activation and deactivation of the line circuit breaker is indicated by the load Light Bulbs. Circuit Diagram of Password based Circuit Breaker. C Program For Lcd Interfacing With At89s52 Programming' title='C Program For Lcd Interfacing With At89s52 Programming' />Components Required. Microcontroller AT8. Buy Software For Cheap. C5. 28. 05. 1 Development Board. Programming Board Programmer4 x 4 Matrix Keypad. Richard Nj Malayalam Serial Actor. The NOKIA 3310 LCD provides a really lowcost solution to add a small graphic display into your project and also good for learning purpose. The LCD is SPI bus. When I started using USBasp a great programmer for AVRs, I soon realized that the avrdude the software for driving USBasp is not much usable. You can programe may microcontroller by using this schematic, all you need to do is that find out the data sheet of that mcu you want to program and check the pin. Channel Relay Module. LCD Display. 10. K Potentiometer. Loads Light BulbsPower Supply. Connecting Wires. If 8. 05. 1 Development Board is not used, then you need. MHz Crystal. 2 x 3. F Capacitor. 2 x 1. K Resistors 14 WattPush Button. F Capacitor Electrolytic1. K x 8 Pull up Resistor Pack. If Relay Module is not used, then you need components mentioned for one load. V or 1. 2V Relay. K Resistor 14 WattBC5. NPN Transistor. 1N4. PN Junction Diode. How to Design Password based Circuit Breaker Circuit The above circuit consists of 8. AT8. 9C5. 2, 44 Matrix Keypad, 1. LCD Display, 4 Channel Relay Module and Four Loads. LCD data pins are connected to PORT1 and control pins RS, RW and EN pins are connected to P3. GND and P3. 1 respectively. Here, the LCD is used to display the information related to the load. Keypad is connected to PORT2 of the microcontroller. The four Row Pins of the Keypad are connected to P2. P2. 3 and the four Column Pins are connected to P2. P2. 7. Using this keypad, we need to enter the password. Four Lamps acting as Electrical Lines are connected to P0. Interfacing bluetooth module with 8051 microcontroller HC05 module. Design and programming of controlling embedded system using mobiles via BT module hc05. IMU Interfacing Tutorial Get started with Arduino and the MPU 6050 Sensor The PCAM Practical Course for Atmel Microcontrollers is designed for beginners. It includes development hardware with onboard interfaces and an insystem. C Program For Lcd Interfacing With At89s52 MicrocontrollerP0. Channel Relay Module. These are used to indicate circuit breaker state Light ON Line Active and Light OFF Line Not Active. If you are not using the Relay Module, then you need to use 4 BC5. NPN Transistors along with its current limiting base Resistor in order to drive the relays. WARNING Be extremely careful when wiring the AC load to the Relay and mains supply. Algorithm Initially declare the PORT1 to LCD data pins and its control pins RS and E to P3. P3. 2 and P3. 7 respectively. Also declare PORT2 to keypad and use P0. P0. 1, P0. 2 and P0. Initially display enter password on LCD. Now read the five digit password from the user. Compare the entered password with stored password. If the password matches, correct then ON or OFF the particular load and display line or load status on LCD. If the password is wrong, then display wrong password on the LCD. After some delay, again ask to enter password. Simulation Video. How to Operate the Password based Circuit Breaker Project Write the program to the Password based Circuit Breaker in Keil software and create. Burn program to the controller with help of 8. Programming Board and Willar Software. Now give the connections as per the circuit diagram. While giving the connections, make sure that there is no common connection between AC and DC supplies. Use 5. V power supply circuit to provide regulated 5. V DC to the controller. Switch on the both AC and DC supplies. Now relay output pins gets 2. V. So, do not touch the load connected pins. LCD displays enter password. Enter the password with help of keypad. Now, if the password is correct, then circuit breaker changes its state i. ON, now it becomes OFF and if it is already OFF, now it becomes ON and displays line or load status on LCD. If the password is wrong, then the LCD displays wrong password. After some time, the microcontroller asks to enter password by displaying enter password. Advantages. Avoids electrical accidents to line man. Project is simple and easy. Uses commonly available components. Applications. Used in electrical substations to ensure line man safety. This system is used in buildings and houses. Used in hotels and shopping malls to save the power. Can also be used as Password based electrical appliance control or Password based Load Control system.