Quiz-type game shows are increas- ingly becoming popular on tele- vision these days. In such games, fastest finger first indicators (FFFIs) are used to test the player’s reaction time. The player’s designated number is displayed with an audio alarm when the player presses his entry button.
The project circuit presented here determines as to which of the four contestants first pressed the button and locks out the remaining three entries. Simultaneously, an audio alarm and the correct decimal number display of the corresponding contestant are activated.
This project circuit design used the digital integrated circuits such latch IC, NAND Gates, Encoder, hex inverter, driver and timer 555 ICs. A 7 segment display used to show decimal number and audio buzzer is activated comprising clock oscillator(555), this oscillator frequency is adjustable by the preset. The circuit employs the regulated power supply of +5 V using 7805 and +12 V for sufficient alarm level. Once the organiser identifies the contestant who pressed the switch first, he disables the audio alarm and at the same time forces the digital display to ‘0’ by pressing reset pushbutton provided here.
This project design can be further enhanced to accomodate more than four contestants With a slight modification.
Now a days, things are changing rapidly in the world. Many machines are developed which made human life easier. Now, peoples are so much busy in their work. People think that there should be a technology that will reduce their work load. Internet of Thing fulfils this requirement of people.
Here we propose to use IOT in order to control home appliances, thus automating modern homes through the wifi network /internet. This system uses four loads to demonstrate as house lighting, fan, TV etc. Our user friendly interface allows a user to easily control these home appliances through the internet. For this system we use an ESP8266 WIFI Module interfaced to a Arduino microcontroller. This microcontroller is interfaced with a WIFI modem to get user commands over the internet. Also we have an LCD display to display system status. Relays are used to switch loads.
We also involves more safety and protective features integrated in our home automation system, by includes various sensors like a PIR motion sensor, LDR sensor , Capacitive touch sensor and temperature sensor. A PIR Motion sensor is used to monitor human movement in front of main door and it inform on any human movement thorugh LCD display, also over remote wifi/internet operate phone. A LDR Sensor is used to monitor day lights, it gives signal to microcontroller while daylight is less/high and it done automatic switch on/off the lightning of particular area. A Capacitive touch sensor is used as soft switch which replace the traditional mechanical switches. By just put a human finger touch on it, it sends a signal to microcontroller and it switch ON/OFF the particular appliances. A temperature sensor is monitored atmospheric temperature and shows it on local LCD display as well on remote phone.
A ESP8266 WI-FI module is interfaced to the microcontroller, which is configured as access point mode to access any wifi device over wifi network with/without internet connection. It establishes the wi-fi communication over TCP/IP protocol tp our Web page application, which can be run on any remote smart phone or PC. A GUI button panel is also developed in our web page application fpr switching on/off home appliance, just by touch a GUI panel button it send a command over the wifi network/internet and is received to the Wi-Fi module. The program within the Wi-Fi Module and microcontroller execute the received commands based on that the particular home appliance gets activated through a opto-isolated relay switch and driver interfaced to the microcontroller. The status of the appliances are also displayed on webpage. Thus, this system offers a low cost, powerful and user friendly way of real time home safety and protective automation.
Foreign object debris (FOD) on air port runway pose potential hazard to safety of the aircraft. This hazard can lead from minor incident to fatal accident. A successful foreign object detection (FOD) can be attained with effective Safety Management System (SMS).
This project proposes a method for foreign object detection and alert system based on hardware such as LiDAR sensor and Ultrasonic sensor, Microcontroller and internet of thing (IoT) system to locate debris location for elimination. The project hardware uses an Arduino family microcontroller ATMega328 interfaced to a LIDAR sensor for long range object detect and Ultrasonic sensor for short range, the sensors are placed & mounted to a servo motor which rotates in 180 deg span so can detect FOD in much possible wide range distance. IoT system is implemented for remote monitoring and alerting system, ESP8266 Wi-Fi module is serially interfaced to the controller which makes wireless communication to TCP/IP Protocol operate web page. A Local LCD display is also placed which shows distance and alert for any FOD.
The experimental work will be done on proposed method to detect location (coordinate) debris of various sizes and monitor over IoT system and activate alarm to generate alert for airport staff member.
The purpose of automation should not be restricted to power conservation but it should also facilitate ease of control of devices with minimal intervention of human being. This project is aimed to an alternative approach to allow the human to control the home appliances through their normal blink of human eyes with occurrences of reflected infrared light by the eyes pupil. An IR emitter and detector aligned at such a coordinates that the infrared light would be able to get reflected through the pupil.
The advance ESP8266 wi-fi module is a very powerful device for Iot ( Internet of things) operation, it can play the role of an Access Point, a Station or both at the same time in a wireless network. Very commonly, the access point also has a network connection to the Internet and acts as a bridge between the wireless network and the broader TCP/IP network that is the Internet. The ESP8266 advertises itself as a self-contained WiFi networking solution offering itself as a bridge from existing micro controller to WiFi and is also capable of running self contained applications.
The project design is divided into two basic blocks namely user block and appliance block. The user block is used to take input from the user where as appliance block is placed at appliance side to change the state of the appliances. At user side an advance microcontroller is interfaced to the IR Sensor and ESP8266 wi-fi module acts as access point, while at appliance side a standalone ESP8266 wi-fi module acts as station point and is interfaced to the opto-isolated relay driver circuit, which directly operates the various appliance connected to it as per the remote signal received. Here, the Infra-red signal is as measure to give input to the system for defining the operating of appliances.
The IR transmitter and receiver are placed within a line using a wearable spectacle in front of eye. While pressing a push button connected to user side, Input is taken from the IR sensing circuit to microcontroller for the definite interval of time and then IR sensing circuit is switched off. This IR sensing duration is also indicated by a LED on/off. The IR signal is connected to interrupt circuit of microcontroller, which is as in term number of counts the eye blinks during the sensing ON period, is calculated and stored in microcontroller. The microcontroller and ESP8266 is programmed such a way that the according to the number of eye blink count the appropriate appliance is being operated. The wireless network communication is established between the ESP8266 at user side and appliance side respectively as access and station point in wi-fi network. At appliance side, an opto-isolated relay driver is directly connected to ESP8266 wi-fi module, according to received wireless signal relate to number of eye blink by user, it transmit the signal to the particular relay and finally the states of appliances will be flipped.
The term of Li-Fi Technology basically is called Visible Light Communication (VLC). This technology can transmit the data through high illumination LED devices that varied the intensity is very faster than the human eyes can follow The LED bulb can cycle OFF and ON millions of times per second. The visible light spectrum is 10,000 faster than the radio frequency spectrum.
This project proposes a short range LI-Fi communication system using LED bulb, which consists a PC terminal and LED in transmitter, an Arduino series of microcontroller interfaced to photo detector circuit and LCD display. The communication system is designed to support point-to-point in one direction. Terminal window of PC is used to transmit data stream in the form of text in ASCII format. The communication between Tx-PC and transmitter circuit is performed using a USB to UART converter. The transmitter circuit will modulate the data received from the Tx-PC and perform data framing. The modulated data will be fed to the analog front end transmitter circuit (Tx-AFE) which consists High speed Mosfet based LED driver. The LED driver circuit will switch on and off the LED based on the modulated data so that the data will propagate through free space (optical channel. The data will be received by the photodiode in the receiver. The information contained in the light is converted into electricity. The analog front end receiver circuit (Rx-AFE) will condition the received signal so that Rx microcontroller (Rx-μC) can demodulate the data correctly. The data stream is then displayed on the LCD as a running text.
Here, we also perform remote operation of appliances over this wireless Li-Fi data communication, wherein four appliances can be switched on/off using an op-to isolated relay driver interfaced to the microcontroller. Based on the predefine binary text command is transmitted remotely from PC and is received by receiver and modulate it and according to the programme code written the microcontroller send signal to the relay driver to switch on/off the particular appliance connected to relay.