Arc Cigarette Lighter Parts - DIY Electronic Lighter Kit GPS you can use external supply

you can use external supply or connect +5V and GND pin of Arduino

Easy to install and operate

If you want to measure a different type of Gas you can check these Gas Sensors

There are two transmitters

This is the 5V relay most commonly used as switching device in electronic circuits

Arc Cigarette Lighter Parts - DIY Electronic Lighter Kit GPS you can use external supplySmoking though it kills and create all sort of health problems yet there are billions of people all over the world who smoke. This is a DIY Electronic Lighter Kit which can ignite the cigarette paper due to very high temperature available at output. It is very small in size and require 5V and atleast 3A of current to operate but if you use 3V supply then the current demand will increase. So you need to connect an external battery to power the device