Quantity   Component name
1 × Shinyei Model PPD42NS Dust Sensor Air quality sensor.
1 × Arduino Leonardo Microcontroller board.
1 × Large Project Enclosure The title says it all.
1 × Green LEDs Indicates parts per million on a bar graph.
1 × 220 Ohm Resistor Current limiting resistors for the LEDs.
1 × 7-12v Power Supply. Power supply with standard barrel plug connector.
1 × 80 mm Fan Blows sir into the sensor.
7 × Various Male Headers For connection to arduino board.