COMPONENTS

To mount your traffic light you are going to need:

1 Arduino board and cable to connect it to a computer

or

1 ESP8266 board

1 breadboard

1 PM10-PM2.5 and PM1 sensor

3 LEDs (yellow, green and red)

3 resistors

1 16X2 4-pin display (preferably)

15 male female cables

1 male male cable

1 switch

1 battery compartment of six and batteries or an external mobile battery

1 old lunch box or cardboard box

Approximate total cost:

With Arduino: 40 euros

With ESP8266: 20 euros

You can look for a specialized store or buy online (it may take a few weeks to arrive)