Description:FIELD OF THE INVENTION
This invention relates to Real-time Implementation of Automatic Home Appliance's Electricity Control by Using Microcontroller.
BACKGROUND OF THE INVENTION
Conventional electrical operation has depended on physical switches along with mechanical timers as control devices. The systems work well but they do not block unauthorized access. There is a growing need for secure electrical device access control in critical areas such as laboratories as well as industrial plants data centres and smart homes. A password-based authentication system offers a simple yet secure solution to address this issue. User authentication mechanisms have become commercially attainable through advancements in embedded systems and digital electronics, thereby making them easier to incorporate into electrical systems. Raspberry Pi and Arduino alongside other microcontrollers in conjunction with 8051 and PIC enable programmers to include control algorithms in addition to security features and user interfaces into very small hardware systems. The system operations based on passwords depend on several components which produce efficient and secure functions. A 4x4 matrix keypad acts as the input device since it offers economic accessibility for entry by users. The central part of the system contains a microcontroller or processor that is tasked with saving password definitions and user input for comparison purposes. The system compares the input password to its saved value by means of its microcontroller and, if they are equal, the microcontroller uses the relay switch to drive high-voltage devices using low-voltage signals. A display device with an LCD or LED display operates in this system to display real-time data to users like prompts status signals and success and failure verification notifications in the course of password-checking operations. The system comes with an effective password authentication system due to its selection of elements.
Security-based projects in the past used biometric sensors and RFID systems combined with smart cards, but the implementation needed high cost and complex deployment. Password-based systems offer ease of implementation along with easy modification and maintenance features which make them suitable for use in academic implementations and prototype development as well as small business applications. This project is a development based on existing technologies to provide an economical security solution that remains highly efficient and ensures easy usage for the protection of electrical circuits. The security system operates suitably in three different venues which are homes stand-alone with offices, laboratories and industrial premises. A blend of digital logic fundamentals paired with security methods enables the system to integrate vintage electrical engineering approaches and contemporary automation systems via an accessible secure trustworthy platform.
https://www.ijert.org/password-based-circuit-breaker-control-to-ensure-electric-line-mans-safety-and-load-sharing disclosed that the major problem in the power system is the electrical accidents 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. Also, the load distribution system has been proposed in which sharing of the load is done between village side and city side.
https://www.ijset.in/wp-content/uploads/IJSET_V12_issue2_551.pdf disclosed when operated manually we see fatal electrical accidents to the line man are increasing during the electric line repair due to the lack of communication and coordination between the maintenance staff and the electric substation staff. In order to avoid such accidents, the breaker can be so designed such that only authorized person can operate it with a password. This ensures security of the worker because no one can turn on the line without his permission. The system is full controlled by the 8-bit microcontroller of 8051 family. A keypad is used to enter the password and a relay to open or close circuit breaker, which is indicated by a lamp.
https://www.primescholars.com/articles/design-and-construction-of-a-password-based-circuit-breaker.pdf disclosed a password-based circuit breaker is a security device designed to protect electrical circuits from unauthorized access and potential damage. It serves as an additional layer of security for sensitive electrical systems, such as home automation systems, industrial machinery, and critical infrastructure. This article explores the design and construction of a password-based circuit breaker, outlining the key components and considerations to ensure a reliable and effective system. Microcontroller Unit (MCU) IS the heart of the password-based circuit breaker is an MCU, typically an Arduino or a Raspberry Pi. The MCU processes input from the user, manages the password database, and controls the circuit breaker’s operation. Keypad is the circuit breaker is equipped with a keypad for users to enter their password. The keypad can be a membrane keypad or a numeric keypad, depending on the complexity of the password. A display module, such as an LCD or OLED screen, provides visual feedback to the user, such as prompting for the password and displaying system status. The solenoid actuator is responsible for physically tripping or resetting the circuit breaker when the correct password is entered.
None of the prior art disclosed what the present invention disclosed. Present invention relates to
real-time password-based electricity control for home appliances using a microcontroller
SUMMARY OF THE INVENTION
This summary is provided to introduce a selection of concepts, in a simplified format, that are further described in the detailed description of the invention.
This summary is neither intended to identify key or essential inventive concepts of the invention and nor is it intended for determining the scope of the invention.
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.
Working Principle: The idea behind a password electrical circuit is to not let an electrical device operate until the right password has been entered by an authorized user. The password is entered on a keypad and read by a microcontroller. The password entered is matched with one already saved in the memory of a microcontroller. The microcontroller turns on the connected electrical device by powering a relay module that completes the circuit and permits current to flow to it if the password is entered correctly. The system forbids access if the password is entered wrongly and can display an error message or ring a buzzer to notify users. Features like the timed lockout, password limit, and even alarm system triggering with repeated failed attempts can be incorporated into the system for enhanced security. The device can be manually shut down upon task completion, or the system is programmed to shut down the relay after a predetermined time. This technique, with special support in residential houses, offices, laboratories, and industries, provides safe and controlled entry to electric circuits.
BRIEF DESCRIPTION OF THE DRAWINGS
The illustrated embodiments of the subject matter will be understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
FIGURE 1: SYSTEM ARCHITECTURE
The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
Fig.1. Simulative structure of advanced Password-based electrical circuits.
DETAILED DESCRIPTION OF THE INVENTION
The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a",” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In addition, the descriptions of "first", "second", “third”, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Working Principle: The idea behind a password electrical circuit is to not let an electrical device operate until the right password has been entered by an authorized user. The password is entered on a keypad and read by a microcontroller. The password entered is matched with one already saved in the memory of a microcontroller. The microcontroller turns on the connected electrical device by powering a relay module that completes the circuit and permits current to flow to it if the password is entered correctly. The system forbids access if the password is entered wrongly and can display an error message or ring a buzzer to notify users. Features like the timed lockout, password limit, and even alarm system triggering with repeated failed attempts can be incorporated into the system for enhanced security. The device can be manually shut down upon task completion, or the system is programmed to shut down the relay after a predetermined time. This technique, with special support in residential houses, offices, laboratories, and industries, provides safe and controlled entry to electric circuits.
Components list and its uses:
 Microcontroller (Arduino Uno) – Controls the entire system and processes password input.
 4x4 Matrix Keypad – Used to enter the password.
 16x2 LCD Display – Displays messages and system status.
 Relay Module (5V) – Switches the electrical device ON/OFF.
 Buzzer – Provides audio alerts on incorrect password attempts.
 10kΩ Potentiometer – Adjusts LCD contrast.
 Resistors (220Ω, 1kΩ) – Limits current to protect components.
 LEDs – Indicate system status or power.
 Power Supply (5V/9V) – Provides power to the circuit.
 Breadboard/PCB – Platform to build the circuit.
 Jumper Wires – Connect components on the board.
Implementation & Testing: The initial process of using the Password-Based Electrical Circuit is to assemble all the components on a breadboard or PCB. Programming code is loaded into the microcontroller (for example, the Arduino Uno) to accept keypad inputs, store a predefined password, and drive the relay based on the confirmation of the password. To toggle an external electrical device, the relay module is attached to a digital output pin, and the keypad is attached to the digital input pins of the microcontroller. To provide real-time feedback, such as prompting password entry and indicating access status, the LCD is connected in 4-bit mode. The system is powered on and subjected to a series of tests once the hardware setup is complete. Testing the keypad input and ensuring the microcontroller properly records and displays the characters entered on the LCD form the first step. The second step is to ensure that the password is valid; if the password is entered correctly, the relay should be turned on and the connected device powered on; if entered wrongly, an error message or buzzer should be displayed on the screen. Further testing includes ensuring that the relay opens when required and testing how the system responds to multiple failed attempts. Final testing ensures that each component works in conjunction with another and that the system can operate the electrical device reliably using a password. Incorrect passwords, power reset behaviours, back-to-back entries, and correct passwords are some of the test cases employed. After passing the tests, the system is ready for application in real-life situations.
Results & Analysis: Password-Based Electrical Circuit technology performed as desired and satisfactorily during testing. The relay was properly triggered after the correct password had been entered, enabling the connected electrical appliance to operate, and clear messages were shown on the LCD for confirmation of access. The unauthorized attempt was signalled by a buzzer and proper error messages were displayed when entering an incorrect password. The system improved its security aspect by going to temporary lockout mode upon three consecutive wrong inputs. The system was stable via several trials, and the response time was quick. Generally, the project was an economical, effective, and efficient way of controlling electrical devices, and it is therefore appropriate for application in access-restricted areas, labs, and home automation. The results validated the reliability of the system and its ability for further modification to incorporate functionalities like wireless control, alarm systems, and updating passwords.
Applications & Future Scope: There are many applications of the password-based electrical circuit system in reality where there should be limited access to electrical appliances. It can be utilized with great effect in businesses to control access to important equipment, at home to limit the use of power-consuming devices, and in laboratories or workshops to avoid illegal usage of machinery. Small protection and automation systems for the industry can utilize the technology too. Future development of this project could include features such as resetting passwords, biometric login (e.g., fingerprint or face ID), remote control through mobile applications or Internet of Things systems, and logging to track the history of access. The system is also scalable and versatile for advanced security and automation purposes and can be further extended to control many devices with personalized password protection.
Conclusion: With a password authentication system, the Password-Based Electrical Circuit project best illustrates an easy but efficient means for the protection and regulation of electrical devices. The use of a keypad, microcontroller, LCD, and relay module by the system guarantees that only the authenticated user can use the connected device. The performance is efficient, economical, and easy to implement, which makes it suitable for a wide range of applications like restricted access systems, residential control systems, and lab control devices. It can be deduced from successful testing and inspection that technology provides ease and protection. The project establishes a base for sophisticated and secure automation systems, with potential future development updates such as biometric verification or IoT integration.
, Claims:1. A password-based electrical circuit for controlling the operation of an electrical device, comprising;
a 4x4 matrix keypad for receiving a user-entered password;
a microcontroller (such as an Arduino Uno) operatively connected to the keypad, having a memory for storing at least one predefined password, and configured to;
receive the user-entered password from the keypad;
compare the received password with the stored password; and
generate a control signal based on the comparison;
a relay module (5V relay module) operatively connected to the microcontroller and the electrical device, configured to selectively complete or interrupt an electrical circuit to the electrical device in response to the control signal from the microcontroller, thereby enabling or preventing the operation of the electrical device;
a display (16x2 LCD display) operatively connected to the microcontroller for displaying messages to the user, including prompts for password entry and indications of access status;
an audible indicator (buzzer) operatively connected to the microcontroller for providing an audio alert upon an incorrect password entry;
a power supply (5V/9V power supply) for providing electrical power to the components of the circuit;
10kΩ Potentiometer to adjusts LCD contrast;
Resistors (220Ω, 1kΩ) to Limits current to protect;
LEDs to Indicate system status or power;
Power Supply (5V/9V) to Provides power to the entire circuit;
Breadboard/PCB to Platform to build the circuit;
wherein entire circuit physically interconnected on a platform such as a Breadboard or PCB using Jumper Wires, thereby enabling secure and controlled operation of electrical devices based on password authentication with integrated user interface and feedback mechanisms.
2. The password-based electrical circuit as claimed in claim 1, wherein said circuit working comprising the steps of;
Providing electrical energy by power supply;
Creating electrical signals that are sensed by the microcontroller when the key in the keypad, is pressed;
Processing signal by the microcontroller to identify the entered characters and stores them;
Comparing the entered password with a stored password by the microcontroller then electrically compares the entered password;
Generating an electrical control signal by microcontroller based on the comparison;
Receiving this control signal electrically by the relay module, which then electrically switches the connected device;
Sending signals electrically to the LCD to display information and to the buzzer to produce an audible alert by the microcontroller also;
Limiting current by the resistors electrically to protect the LEDs.
Adjusting voltage level to control the LCD's contrast by the potentiometer electrically;
Providing the physical and electrical connections between all components by the breadboard/PCB and jumper wires.