Sensor based Projects


GSM based Home- Industrial Safety System Against Gas and Fire Detect

This project is aimed to design a wireless safety system for gas leakage and fire alert warning system via GSM communication system. Dangerous gas leakage as well as fires have caused wide damage to home and industries and economies in the past. These agents spread wildly and instant action needs to be taken as soon as such an event occurs. It is very important to detect a gas leak or fire as soon as it breaks out so that it can be prevented from spreading instantly. This project propose a system that detects gas leakage as well as fires as soon as they start and alerts the authorities automatically so that it can be stopped from spreading.

 

The project design involves an advance microcontroller interfaced to gas and fire detect sensors and GSM modem. The detector is based on the commercial gas sensor and gives digital output on detect any gas leakage as soon as it is encountered. The gas sensor sends a signal to the microcontroller as soon as gas leak is detected so that microcontroller can process it further. The fire detector is based on light sensing photo diode in order to detect fire. The fire sensor instantly sends a signal to the microcontroller on fire detection.

 The temperature and light sensor instantly sends a signal to the microcontroller on fire detection. Once the microcontroller receives signal from the sensors, it processes the input and calculate and alert about the intensity and severity of fire based on sensor's value and immediate it alerts by displaying on LCD as well buzzer alarming and then sends a signal to the GSM modem to send an sms to the intended authorities so that they may take appropriate action.

 The power supply consists a step down transformer 230/12 vac , this ac voltages is converted to dc unregulated voltages by a full wave diode rectifier bridge and further ripple free dc voltages is obtained by a capacitive filter. Further, +5 volt dc regulated supply is generated using a voltage regulator IC 7805 for operation of the circuit.

 This project can further enhanced by involving more safety parameters such as shock/vibration and theft safety as well.    

Hand Gestured Controlled Robot using MEMS Sensor

The aim of this project is to increase a passage system to control a robot by using the use of misuse MEMS sensor. In this project, a hand gesture controlled robot is developed using MPU6050 sensor, which is a 3-axis Accelerometer and 3-axis Gyroscope sensor and the controller part is Arduino microcontroller and wireless system is RF (Radio Frequency) communication.

In this project Instead of using a remote control with buttons or a joystick, the gestures of the hand are used to control the motion of the robot. The control is based on wireless communication, where the data from the hand gestures is transmitted to the robot over RF link, RF Transmitter and Receiver pair.

This gesture controlled robot is a wireless operated robot and has two parts, Transmitter and Receiver. the transmitter part, which consists of Arduino, MPU6050 sensor, Encoder and RF Transmitter that will continuously monitor the MPU6050 sensor. This data is captured by the Arduino, which then transmits a corresponding data to the Encoder, based on the orientation of the MPU6050 Sensor. The parallel data received by the encoder is converted into serial data and this serial data is transmitted by the RF Transmitter. At the receiver section, the RF Receiver receives the serial data and transmits it to the Decoder IC. The Decoder will convert the serial data to parallel data and this parallel data is given to the motor driver IC. Based on the data, the movement of the motors, and hence the movement of the robot is defined.

In many cases, the robot devices are some tough and complex while we control it with the help of buttons and switches. The major fields that prefers hand gesture robots are Defence field, industrial robotics, vehicle part assemble in civil side, medical field for surgery.

Temperature Controlled LEDs using LM35

This project proposed a building a simple yet very useful circuit using Temperature Sensor LM35. In this circuit, we are going to control the LEDs according to temperature around. If temperature goes beyond a particular level (50 Degree in this circuit) then Red LED will glow automatically, otherwise yellow LED remains on below that particular temperature. This threshold temperature value can be set by adjusting the Variable resistor in the circuit, according to requirement.



This Temperature controlled Lights circuit can be useful in many ways, like it can work as temperature indicator or it can trigger any device like fan or alarm beyond a particular temperature. It can also work as fire alarm if you set the threshold temperature very high like 100 Degree Celsius. In this circuit you will also learn about how to use LM35 sensor in any circuit. LM35 is very popular and inexpensive temperature sensor generally used as digital thermometer or to measure temperature.

Temperature Meter Display

This temperature meter uses the precision micro power centigrade sensor IC LM35. The output voltage of the IC is linearly equal to +10Mv per degree centigrade. The temperature level is displayed through LED readout.

The circuit uses the precision temperature IC LM35. This three pin transistor like IC give output linearly equal to +10mV per degree rise in temperature. It can measure temperature between -4 degree to +110 degree centigrade. Its related type LM34 is Fahrenheit sensor and its output is equal to -10mV per degree Fahrenheit. Output of IC1 is directly given into the input of the display driver IC LM3914. It is a monolithic integrated circuit with 10 active low outputs that can drive 10 LEDs directly without a current limiting resistor.

The internal circuitry of the IC adjusts the current passing through the LEDs. The input of LM 3914 is very sensitive and its outputs 18 – 10 sinks current one by one as the input receives an increment of 125 milli volts. Here only 6 outputs are used to drive 6 LEDs. More LEDs can be included in the remaining outputs if required. As the IC LM35 senses temperature rise, LEDs one to six light up. If the sensitivity is not high, VR2 can be omitted. Then output of IC LM35 should be directly connected to the input of IC LM3914.

Digital Audio-Visual Informatics System for Professional Seminar & Public Place

The advance development in technology and its application to our society, as well entertain to people is inspired to create this innovative smart digital system. The main aim of this project is to create a system or device and makes the more interactive and interesting visual and audio information to viewers and that would be also user friendly to all categories of people.

This project is designed using a low power consume advance microcontroller that interfaces with a computer transitions visual screen based on hand motions using a pair of IR sensors (Left and Right hand). Upon sensing a hand motion, the output signal of IR sensor is triggered to generate external interrupt signal to microcontroller. The programmed code for interrupt in microcontroller would decide and send a hex code to PC for either left or right key stroke through serial USB Connection. A specific Visual basic application is developed and run on PC. Upon received a hex code, it is linked to the user’s power point presentation file which is run on PC through this visual basic application. Thus any Audio and visual slide presentation can be remotely scrolled through hand gesture.


Any message or information in text form can be communicated remotely to this system over Bluetooth and android application operate mobile,tablet or PC. A Bluetooth device is interfaced to microcontroller to receive the remote text data which is displayed on LCD display. Also, it can be audible on speaker connected to the system. The received text message is converted to voice by a text to voice module interfaced to microcontroller.


The controller is also a very good way to save electricity as it allows displays to idle and turn off when no one is near by the device by interfacing a PIR sensor. Upon detecting the approach of a person nearby PIR Sensor, the controller send a keystroke to the computer which awakes up the display, it also count the number of person interact to the system.


Thus, this system is very interesting and user friendly for public place and professional seminar, where user can play the audio –visual display just by hand gesture and convey the message-information to viewers remotely.