To build the fart detector, you will need the following:

- A Raspberry Pi module

- A breadboard

- At least six male-to-male jumper wires and eight male-to-female jumper cables.

- Resistors, including two 47k ohm, one 22k ohm, one 10k ohm, and one 4.7k ohm.

- An air quality sensor.

- An enclosure for the circuit board (optional.)

To setup the fart detector up, follow these steps:

- Install or update Raspberry Pi OS or use another Linux distro. Once you install or update the OS, run the following command in a command line window:

sudo amixer cset numid=3 1

2. Download a sound file for the alarm. You can either download a free stock sound or get it directly using the terminal.

3. Develop a dedicated program to vary resistance values. Copy and paste the code from an official Raspberry Pi tutorial.

4. Calibrate the Raspberry Pi fart detector.

5. Set up the monitoring using the sensor along with programming when the alarm goes off. You must also set up continuous monitoring with the sensor.

6. Lastly, you could configure the duration of the alarm so that it continues to play repeatedly until the fart disappears.