Goal of the project: to track the PM 2.5 level throughout our daily activity with a small portable mobile device.
Challenge: How to make this lab small, easy to carry, easy to charge, can test Pm2.5, able to be uploaded to a database and doesn’t look scary to carry around in the public.

Because I need to carry this device on my body on my neck level, around the city especially the subway system. Therefore I need a form of disguise for the device to not look suspicious. What we see very frequently is that, a lot of people wear headphones around their necks even when they are not listening to music. Therefore, I am going to create the mobile lab in the form of headphones.

Below is a simple paper prototype to see if all of my devices would fit in the headphone.

Hardware:
Arduino

Infrared Optical Dust Sensor

Data Logger
Battery (portable cell phone charger)
3D printed head phone or an existing big headphone to hack.