HardLabs

Wearable-Air-Quality-Pendant

Circuit-Digest·Wearable-Air-Quality-Pendant·PCB/Wearable-Air-Quality-Pendant/Wearable Air Quality Pendant.kicad_pcb

Wearable-Air-Quality-Pendant PCB layout, top view — open source STM32 board by Circuit-Digest
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About the Wearable-Air-Quality-Pendant PCB

Wearable-Air-Quality-Pendant is an open source STM32 PCB design by Circuit-Digest, published on GitHub under the MIT license. It is a 2-layer board measuring 32.5 × 32.5 mm, with 46 components from 23 distinct parts.

Its main chip is the STM32U083KCUX, from the STM32 family. Other key parts include the MCP73832T-2ACI/MC, ADPL44002AUJZ2.5-R7 and SGP40-D-R4. By type, the board carries 21 resistors, 10 capacitors, 5 diodes, 4 ICs, 3 connectors and 1 transistor.

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

From the project

The ultra-low power air quality sensor pendant is designed for continuous environmental monitoring in both everyday life and industrial work environments.

Wearable Air Quality Pendant 🌬️ ================================

A compact, battery-powered wearable device that continuously monitors air quality using TVOC detection. Get real-time feedback about your breathing environment through intuitive LED indicators and audio alerts.

This DIY air quality monitor pendant uses professional-grade sensors to track Total Volatile Organic Compounds (TVOC) in real-time. Perfect for monitoring indoor air quality at home, office, or industrial environments.

Wearable-Air-Quality-Pendant, from the project README
From the project README

Main components on the Wearable-Air-Quality-Pendant

MCP73832T-2ACI/MCADPL44002AUJZ2.5-R7SGP40-D-R4STM32U083KCUX

Wearable-Air-Quality-Pendant bill of materials (BOM)

46 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP73832T-2ACI/MC
MCP73832T-2ACI_MC
IC1
1
ADPL44002AUJZ2.5-R7
ADPL44002AUJZ
IC2
1
SGP40-D-R4
IC3
1
STM32U083KCUX
STM32U083KCUx
U1
1
SS8550
Q1
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
1
SWD
J2
1
UART
J3
1
Battery_Cell
BT1
1
Buzzer
BZ1
1
LED_Small
D1
4
LED_RGBK
D2, D3, D4, D5
3
4.7UF
4.7uF
C1, C2, C6
2
2.2UF
2.2uF
C3, C4
2
1UF
1uF
C5, C7
3
100NF
100nF
C8, C9, C10
2
5.1K
R1, R2
13
470R
R3, R11, R12, R13, R14, R15, R16, R17 +5
1
2K
R4
2
4.7K
R5, R6
Show 3 more
QtyPartRefs
1
1K
R8
1
100K
R10
1
4.7R
R23

Wearable-Air-Quality-Pendant design files

The KiCad project lives in the Circuit-Digest/Wearable-Air-Quality-Pendant repository on GitHub; these links point at the commit this page was built from.

Wearable-Air-Quality-Pendant: common questions

What microcontroller does the Wearable-Air-Quality-Pendant use?

The Wearable-Air-Quality-Pendant is built around the STM32U083KCUX, from the STM32 family.

How big is the Wearable-Air-Quality-Pendant PCB?

The Wearable-Air-Quality-Pendant measures 32.5 × 32.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wearable-Air-Quality-Pendant?

46 components, from 23 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 Wearable-Air-Quality-Pendant design files?

From the Circuit-Digest/Wearable-Air-Quality-Pendant 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 Wearable-Air-Quality-Pendant design in my own project?

Yes, under the terms of its MIT license, which Circuit-Digest chose for the repository.

Can I test firmware for the Wearable-Air-Quality-Pendant without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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