In this instructable I am going to show you how to build a fart and smoke alarm hidden in a Minion. This build is the result of me brainstorming with my boyfriend. We wanted to build something with a Minion for quite some time, because the second Minion movie was the first movie we watched together.
Since our favourite scene in the whole movie is the fire alarm scene we decided to build our own alarm minion. You can watch the scene here, should you not be familiar with it:
This project is mainly for fun. Eventhough it certainly works I wouldn't rely solely on it in critical setups. For actual use it has to be calibrated correctly.
For the electrical circuit:
For the rest
You will have to print every part once, except for "Foot.stl" and "LampLeftAndRight.stl" which you will have to print twice.
*) Depending on the gas you want to detect you can also use a MQ-7 or any other sensor of this product line. The MQ gas detectors use a small heater inside with an electro-chemical sensor, if you would like to find out more about them, check out this link. As you can see in the first image the MQ-2 sensor has a good sensitivity for flammable and combustible gasses . The ordinate shows the resistance ratio of the sensor and the abscissa the concentration of the gases.