18-04-2017, 08:56 PM
Hi my name is Mujeeb i would like to get a details report on gas leakage detector mini project. I am a student of Kumasi Technical University(GHANA), i will like to built it as my final project thank you.
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project report on gas leakage detector mini project
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Hi my name is Mujeeb i would like to get a details report on gas leakage detector mini project. I am a student of Kumasi Technical University(GHANA), i will like to built it as my final project thank you.
25-04-2017, 11:41 AM
Here is a gas leak detection circuit that detects LPG gas leakage and alerts the user through audio visual signals. The circuit runs on a 9V PP3 battery. Zener diode ZD1 is used to convert 9V into 5V DC to drive the gas sensor module.
The gas leakage circuit uses the RhydoLABZ gas sensor module SEN-1327. Its output is high when the gas level reaches or exceeds a certain point. A preset on the module is used to set the threshold. The interconnection with the sensor module is done through a 4-pin SIP header.
The details of the pins of the gas sensor module are shown in Fig. 2. An MQ-6 gas sensor is used in the gas sensor module. The sensor can also be used to detect combustible gases, especially methane.
Gas Leak Detector Schematic
![[Image: gas-leak-detector-schematic.jpg]](http://www.electroschematics.com/wp-content/uploads/2012/02/gas-leak-detector-schematic.jpg)
Whenever there is a GLP concentration of 1000 ppm (parts per million) in the area, the output pin of the sensor module becomes high. This signal triggers the IC 555 timer, which is wired as an astable multivibrator. The multivibrator basically works as a tone generator.
![[Image: sen-1327-gas-sensor.jpg]](http://www.electroschematics.com/wp-content/uploads/2012/02/sen-1327-gas-sensor.jpg)
The output pin 3 of the IC 555 is connected to the LED1 and the switching transistor of the speaker SL100 via the current limiting resistors R5 and R4, respectively. LED1 shines and the alarm sounds to alert the user to gas leaks. The tone of the tone can be changed by varying the preset VR1. Use a heat sink suitable for the SL100 transistor.
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