![]() ![]() This gas can be detected by using a sensor like an ideal gas sensor. The dangerous LPG gas can be generated in the service stations, cars, storage tanks, etc. This project is used to design an LPG gas detector using an AVR microcontroller. LPG Gas Detector Based on AVR Microcontroller In the given figure motor is replaced with a lamp load for indication purpose. When this password matches the ATmega microcontroller sends the control signals to the relay to operate the motor otherwise it gives a buzzer alarm. This data further sends to the microcontroller where the password entered by the user compared with a stored password in it. When the user enters the correct password in the android application upon a Graphical User Interface (GUI) in any smartphone, the Bluetooth modem attached to the circuit receives it. Here Bluetooth modem accepts the user input signals and correspondingly sends it to the microcontroller. The figure shows the block diagram of a garage door opening where the ATmega microcontroller acts as a central controller which accepts the input commands from the user to control the motor to open or close the door. Garage Door Opening using the ATmega Microcontroller ![]()
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