As we know my nations air quality is pretty bad therefore I decided to make a air quality analyser to know the actual depth of this danger specially for my home
First connect this device via usb-c cable to your pc then download the firmware files Firmware\BUILD or build them using the ino file in firmware wait for sometime as the BME688 needs sometime to stabilize its reading then after that the neopixels will show the color according to the IAQ of your enviroiment (RED = BAD , GREEN = GOOD , AMBER= MODERATE)
*Note the firmware is untested
This takes the reading of the Bosch IAQ sensor and the temperature sensor to give accurate condition of the enviroiment
| PCB Layout | Schematic / Wiring |
|---|---|
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| Front | Rear |
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| Item | Description | Quantity | Unit Price ($) | Total Price ($) | URL |
|---|---|---|---|---|---|
| PCBA | Custom PCB Manufacturing (JLCPCB) | 1 | 49.35 | 49.35 | https://jlcpcb.com |
| Case | 3D Printed Case (Will be Printed Myself | 1 | 0.00 | 0.00 | https://hackclub.com |
| ESP-32 C6 Mini-1 | MCU | 1 | 4.47 | 4.47 | https://www.digikey.in/en/products/detail/espressif-systems/ESP32-C6-MINI-1-N4/17885796 |
| BME688 | VOC sensor | 1 | 9 | 9 | https://www.digikey.in/en/products/detail/bosch-sensortec/BME688/13681261 |
| TOTAL | 63.00 |
| Comment | Designator | Footprint | LCSC | Quantity |
|---|---|---|---|---|
| 0.1uF | C13, C15, C3, C4, C5, C7, C8 | C_0603_1608Metric | C125205 | 7 |
| 10K | R1, R2 | R_0603_1608Metric | C15401 | 2 |
| 10uF | C10, C12, C14, C9 | C_0603_1608Metric | C19702 | 4 |
| 1uF | C11 | C_0603_1608Metric | C15849 | 1 |
| 220Ω | R5 | R_0603_1608Metric | C23179 | 1 |
| 4.7kΩ | R10, R9 | R_0603_1608Metric | C15401 | 2 |
| 47uF | C6 | C_0603_1608Metric | C140782 | 1 |
| 5.1kΩ | R6, R7 | R_0603_1608Metric | C23186 | 2 |
| 74AHCT1G125SE-7 | U7 | SOT-353_L2.2-W1.4-P0.65-LS2.4-BR | C151417 | 1 |
| AP2112K-3.3TRG1 | U5 | SOT-25-5_L2.9-W1.6-P0.95-LS2.8-BL | C51118 | 1 |
| AP2120N-1.8TRG1 | U4 | SOT-23_L2.9-W1.3-P1.90-LS2.4-BR | C460317 | 1 |
| BME688 | U6 | LGA-8_L3.0-W3.0-P0.80_BME688 | C3664478 | 1 |
| ENS210 | U1 | AMS_QFN-4-1EP_2x2mm_P0.95mm_EP0.7x1.6mm | C2991202 | 1 |
| ESP32-C6-MINI-1 | U3 | ESP32-C6-MINI-1 | C5736265 | 1 |
| SW_Push | Boot1, Reset1 | SW_SPST_PTS647_Sx38 | C720477 | 2 |
| USB-C Receptacle USB2.0 14P | J1 | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | C5143397 | 1 |
| SK6812MINI | D1 | LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | — | 1 |
| SK6812MINI | D2 | LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | — | 1 |
