Usually sensors are expensive and are not easily accessible, for developing you can simulate some analog value from sensor range. Check datasheet for particular sensor. Other parts you can get in most electronics shops.
Its big surprise to see how project works in Proteus and when you try to make this with real parts you see that circuit have problem.
Usually sensors are expensive and are not easily accessible, for developing you can simulate some analog value from sensor range. Check datasheet for particular sensor. Other parts you can get in most electronics shops.
Its big surprise to see how project works in Proteus and when you try to make this with real parts you see that circuit have problem.
For gas(LPG-methane) sensor you can use MQ5, the output voltage of the terminal varying with respect to the content of gas around it, drive the output to a comparator (LM311) and control the comparator outout by connecting a variable resistance to the other terminal of the comparator as voltage reference.