4 layers50 × 50 mm AHAQ-1, the printed circuit board in 3D

AHAQ-1

# Air Quality Station

Size: 50 × 50 mm
Copper layers: 4
Thickness: 1.61 mm
Parts: 61
Nets: 58
Pads: 282
Tracks, vias: 524, 158
Pours: 4
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 15 Dec 2024
Updated: 4 Jan 2025

Overview

AHAQ-1 is an open-source printed circuit board by vactomas, from the vactomas/AHAQ-1 repository on GitHub. It is a 4-layer board of 50 × 50 mm with 61 parts on 58 nets, routed with 524 tracks and 158 vias.

It is built around the ESP32-C6-MINI-1U-H4, BMP280 and TLV75533PDBV, with the SCD41-D-R2, USBLC6-2P6 and MBR0530 among its other parts. Its parts include 30 capacitors, 7 resistors, 7 ICs, 7 connectors and 4 diodes. It belongs with the sensors and measurement boards and the ESP32 and RISC-V boards of this library.

Main components

README

README.md

AHAQ-1 -> AstroHex Air Quality v1

AHAQ-1 is an air quality station. Currently, it is an on-going project in development.

This device is based on the ESP32-C6 microcontroller. It features SCD4X CO2 sensor, BMP280 for temperature and ambient pressure measurements and SEN55 for PM1-10, NOx and VOCs. Additionaly, there are two I2C expansion ports for additional sensors. There is also a connector for E-Paper display.

ESPhome is the firmware of choice for AHAQ-1. This allows for easy integration with Home Assistant instances.

This repo contains all the necessary files to build and flash this device.

Parts

Qty	Value	Footprint	References
11	1uF	Capacitor_SMD:C_0603_1608Metric	C4, C5, C9, C15, C16, C17, C18, C19, C20, C23, C27
10	100nF	Capacitor_SMD:C_0603_1608Metric	C1, C2, C3, C8, C12, C13, C25, C26, C28, C29
7	4.7uF	Capacitor_SMD:C_0805_2012Metric	C6, C7, C14, C21, C22, C24, C30
3	MBR0530	Diode_SMD:D_SOD-123	D2, D3, D4
3	MountingHole	MountingHole:MountingHole_2.2mm_M2_ISO7380	H1, H2, H3
3	TLV75533PDBV	Package_TO_SOT_SMD:SOT-23-5	U4, U5, U7
2	12pF	Capacitor_SMD:C_0805_2012Metric	C10, C11
2	2.2K	Resistor_SMD:R_0603_1608Metric	R14, R15
2	5.1K	Resistor_SMD:R_0603_1608Metric	R5, R6
2	I2C_1	Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal	J3, J4
1	0.47R	Resistor_SMD:R_0805_2012Metric	R13
1	10K	Resistor_SMD:R_0603_1608Metric	R11
1	10M	Resistor_SMD:R_0402_1005Metric	R10
1	32.768kHz	Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm	Y1
1	68uH	Inductor_SMD:L_0805_2012Metric	L1
1	BMP280	Package_LGA:Bosch_LGA-8_2x2.5mm_P0.65mm_ClockwisePinNumbering	U3
1	D	Diode_SMD:D_0603_1608Metric	D1
1	E-Paper	Connector_FFC-FPC:Hirose_FH12-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal	J9
1	ESP32-C6-MINI-1/U	PCM_Espressif:ESP32-C6-MINI-1	U1
1	FAN	Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical	J6
1	SCD41-D-R2	Sensor:Sensirion_SCD4x-1EP_10.1x10.1mm_P1.25mm_EP4.8x4.8mm	U2
1	SEN55	Connector_JST:JST_GH_BM06B-GHS-TBT_1x06-1MP_P1.25mm_Vertical	J5
1	Si1308EDL	Package_TO_SOT_SMD:SOT-323_SC-70	Q1
1	UART	Connector_JST:JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal	J2
1	USBLC6-2P6	Package_TO_SOT_SMD:SOT-666	U6
1	USB_C_Receptacle_USB2.0_16P	Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal	J1

Questions

How big is the AHAQ-1 PCB?

It measures 50 × 50 mm and has 4 copper layers, 1.61 mm thick.

What parts does the AHAQ-1 use?

61 parts, built around the ESP32-C6-MINI-1U-H4, BMP280, TLV75533PDBV and SCD41-D-R2. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the AHAQ-1 KiCad files?

From the vactomas/AHAQ-1 repository on GitHub, at the commit this page was made from: the board is PCB/AHAQ-1.kicad_pcb and its schematic PCB/AHAQ-1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the AHAQ-1 design in my own project?

Its repository states no licence, so its author keeps all rights: ask vactomas before reusing the design.

Category and platform

Sensors and measurement ESP32 RISC-V

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/vactomas-ahaq-1" title="AHAQ-1 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/vactomas-ahaq-1.jpg" alt="AHAQ-1" width="1200" height="900">

A picture that opens the board, for a README

[![AHAQ-1](https://pcbkit.io/embed/boards/vactomas-ahaq-1.jpg?size=s)](https://pcbkit.io/boards/vactomas-ahaq-1)

Source

Repository: vactomas/AHAQ-1
Board file: PCB/AHAQ-1.kicad_pcb
Commit: 6aa3a7f
Licence: Not stated

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