Microcontroller based audio muting system depends on mobile call
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This project uses a microcontroller-based system to automatically mute an audio system when a mobile phone call is detected. It can sense the presence of an activated mobile phone from up to 1.5 meters away and detects incoming, outgoing calls, SMS messages, and video transmissions even if the mobile phone is in silent mode. The circuit converts current to voltage using an operational amplifier and mutes the audio for the duration the mobile phone is in use.
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cellphone detector
What it is: This is a circuit for a mobile transmission detector which can detect use of a mobile phone within the range of 1.5 meters. Whenever usage of mobile phone is detected such as calling or texting a beep alarm starts sounding and a led blinks.
Why it is: This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one and a-half meters.
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mobile bug
This document describes a circuit for detecting mobile phone transmissions within a range of 1.5 meters. The circuit uses a 0.22uF capacitor to capture radio frequency signals from an activated mobile phone. The captured signals are converted to a voltage by an op-amp IC, triggering a buzzer and LED to alert of phone usage. The circuit can detect calls, texts and video transmissions from phones, even on silent mode. It has potential applications to prevent phone use in secure areas like exam halls. Future work could aim to increase the detection range.
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This document describes a voice-controlled home appliance system using a microcontroller. An Android application sends voice commands via Bluetooth to the microcontroller, which then operates devices like lights and appliances through TRIACs and opto-isolators. The system allows users to remotely control home appliances just by using voice commands from a smartphone, providing convenience and accessibility.
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Electronic eye for security system @1000KV Technologies 9030844877
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KAGITHALA YASASWINI
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fault detection of transformer using GSM,,,,by YASASWINI.KAGITHALA
This document describes a project to design a fault recognition protection system for AC transmission lines using GSM technology. The system monitors the output of a step-down transformer using a microcontroller and fault indicator circuit. If a fault is detected, a relay is activated and a message is sent via GSM modem to notify the user. The system is powered by a regulated 5V supply and includes components like a LCD to display the power line status, buzzer to sound on fault, and MAX232 for serial communication between the microcontroller and GSM modem. The aim is to remotely monitor transformer faults without needing to check relays on site.
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intelligent street light system using gsm Report
The document describes an intelligent street lighting system using GSM technology. It consists of microcontroller-based nodes installed on each street light that monitor light levels, pollution, noise and weather conditions. The nodes send this sensor data wirelessly to a central control system using GSM. The control system can then automatically turn the street lights on/off based on the sensor readings and time of day to reduce energy consumption. It allows remote monitoring and control of the entire street lighting system from one location. The system aims to increase efficiency, reduce costs and make lighting operations more sustainable through automation and intelligent control of individual lights.
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This document describes a project to develop a wireless home automation system using GSM. It involves designing a system that allows remote control of home appliances like lights, fans, etc. using mobile phones. The key components of the system include a microcontroller, GSM modem, relay modules, and a power supply. The system will enable users to turn appliances on/off remotely by sending commands via calls or messages to a mobile phone connected to the home automation device. The document provides details of the various hardware and software aspects involved in implementing this home automation system.
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This document describes a smart home automation system that allows users to control home appliances remotely using a smartphone. The system uses an 8051 microcontroller connected to a Bluetooth module to receive control signals from a mobile app. When the user presses buttons in the app, characters are transmitted via Bluetooth to the microcontroller. It decodes the signals and activates relays connected to home appliances like lights and fans, turning them on and off. The system is designed to automate home appliances and save energy by remote control using Bluetooth communication between a smartphone and microcontroller.
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It is a new concept in world of Electricity measurement. This concept is not only beneficial for electricity measurement but also has the capability to prevent theft and misuses of electricity. The concept of IOT (Internet of Things) based prepaid energy meter is very similar to prepaid mobile system, you recharge and spend Accordingly.
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An electric circuits' remote switching system based on gsm radio network
Abstract Mobile phone industry is classified among the fastest growing engineering branches. It has to be exploited for vast applications, reliability and affordability. Mobile cellular phone subscribers have reached saturation point; with such information, the basic cell phone that was mainly utilized to make calls will also be utilized for remote switching and control activities. The now developed system is based on the global system for mobile communications (GSM) radio network: it will operate as a very long distance remote switch. Utilizing the daily cell phone, a user will either put on/off any desired electric circuit located in an owned, controlled compound. Two cell phones are provided, one being a mobile transmitter user end and another being referred to as a fixed receiver end. A signal will be sent from the user end to put a consumer’s electric circuit either on or off at the receiver end; afterwards, the receiver end will notify the user-end about the on/off state of the consumer. The particularity of this publication is the system simplicity, yet cheap and safe, so that even very low income cell phone users can enjoy radio frequency (RF) technology’s increasing applications. The software utilized to develop and simulate circuits is the linear technology, LT spice. The calculative theory has quantitatively enriched the methodology. Both the building blocks and the physical implementation diagrams for the system are herein contained. The remote switching system based on GSM radio network has been successfully designed, implemented, tested and its functionality has been examined.
Keywords: Radio communication, LTspice, GSM, ON/OFF control
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Gsm based smart card information for lost atm cards
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An electric circuits' remote switching system based on gsm radio network
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Microcontroller based audio muting system depends on mobile call
- 1. MICROCONTROLLER BASED AUDIO MUTING SYSTEM DEPENDS ON MOBILE CALL ABSTRACT Now a day, every system is automated in order to face new challenges in the present day situation. Automated systems have less manual operations, so that the flexibility, reliabilities are high and accurate. Hence every field prefers automated control systems. Especially in the field of electronics automated systems are doing better performance increasingly. This project consists of IC CA3130 operational amplifier, IC2 NE 555 constable multi- vibrator, micro controller and relay. Mobile transmission data detector can sense the presence of an activated mobile phone from a distance of one and half meters .It also useful for detecting the use of mobile phone for spying and unauthorized video transmission. It detects both incoming, outgoing calls, SMS and video transmission even if mobile in silent mode. Here the op-am IC CA 3130 is used as a current to voltage converter with capacitor C3. Here in this project we are implementing a system to control the appliance based cell phone call. The circuit would automatically mutes the audio system on arrival of call ring for the duration the cell phone handset is off-hook. BLOCK DIAGRAM