HardLabs

Air quality sensor

havamal-65·air-quality-sensor·hardware/kicad/air-quality-sensor.kicad_pcb

Air quality sensor PCB layout, top view — open source board by havamal-65

About the Air quality sensor PCB

Air quality sensor is an open source PCB design by havamal-65, published on GitHub. It is a 2-layer board measuring 80 × 90 mm, with 9 components from 8 distinct parts.

Other key parts include the 102010328, 5190, 4829, SSD1306 and TP4056. By type, the board carries 5 ICs, 2 resistors, 1 battery holder and 1 capacitor.

It belongs with the sensors, power & battery and iot & wireless designs in this gallery.

From the project

A small wearable air quality sensor that connects to a phone via Bluetooth Low Energy (BLE). Monitors CO2, VOCs, NOx, temperature, and humidity.

A small wearable air quality sensor that connects to a phone via Bluetooth Low Energy (BLE). Monitors CO2, VOCs, NOx, temperature, and humidity.

- Real-time CO2 monitoring (400-5000 ppm) - VOC and NOx index detection - Temperature and humidity sensing - BLE connectivity for mobile app - OLED display for standalone viewing - Portable battery power (1-2 day runtime)

Main components on the Air quality sensor

10201032851904829SSD1306TP4056

Air quality sensor bill of materials (BOM)

9 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
102010328
XIAO_ESP32C3
U1
1
5190
SCD41
U2
1
4829
SGP41
U3
1
SSD1306
SSD1306_0.96
U4
1
TP4056
TP4056_Module
U5
1
1578
LiPo_3.7V_500mAh
BT1
1
100NF
100nF
C1
2
4.7k
R1, R2

Air quality sensor design files

The KiCad project lives in the havamal-65/air-quality-sensor repository on GitHub; these links point at the commit this page was built from.

Air quality sensor: common questions

How big is the Air quality sensor PCB?

The Air quality sensor measures 80 × 90 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Air quality sensor?

9 components, from 8 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Air quality sensor design files?

From the havamal-65/air-quality-sensor repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Air quality sensor design in my own project?

The repository has no license, so all rights stay with havamal-65. Use it as a reference, and ask the author before reusing the design.

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