Modular aq sensor

open-seneca·modular-aq-sensor·pcb files/v2/PCB.kicad_pcb

Modular aq sensor PCB layout, top view — open source board by open-seneca

About the Modular aq sensor PCB

Modular aq sensor is an open source PCB design by open-seneca, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 116.7 × 53.3 mm, with 25 components from 18 distinct parts.

Other key parts include the HM-11, SHT31-DIS-B and TLV70218_SOT23-5. By type, the board carries 14 connectors, 4 resistors, 3 ICs, 3 capacitors and 1 switch.

It belongs with the sensors designs in this gallery.

From the project

The repo contains the firmware, 3d-printed casing, PCB-files, and documentation for our modular open-seneca sensor based on a "Black Pill" MCU. It can be flashed using Arduino IDE.

Please also refer to our current, smaller, and all-integrated air quality sensor kit which is also open-source on Github: https://github.com/open-seneca/integrated-aq-sensor

If you already have a sensor and want to upload and visualise your data you can create an account here: http://app.open-seneca.org

If you have built your kit and want to flash the code to the Black Pill board, here is how:

From the project README

Main components on the Modular aq sensor

HM-11SHT31-DIS-B TLV70218_SOT23-5

Modular aq sensor bill of materials (BOM)

25 components, 18 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	HM-11	HM-11-MODULE	IC1
1	SHT31-DIS-B	SON50P250X250X90-9N-D	IC2
1	TLV70218_SOT23-5	SOT-23-5	U1
1	Conn_01x05	B5B-ZR-SM4-TF	J1
1	Conn_01x02	Pin_Header_Straight_1x02_Pitch2.54mm	J2
1	USB_OTG	USB_Micro-B_Molex-105017-0001	J3
4	Conn_01x17	Socket_Strip_Straight_1x17_Pitch2.54mm	J4, J5, J6, J10
1	Conn_01x04	Socket_Strip_Angled_1x04_Pitch2.54mm	J7
1	Conn_01x04	Socket_Strip_Straight_1x04_Pitch2.54mm	J8
1	Conn_01x08	Socket_Strip_Straight_1x08_Pitch2.54mm	J9
1	Conn_01x03	Socket_Strip_Straight_1x03_Pitch2.54mm	J11
1	Conn_01x04	JST_SH_SM04B-SRSS-TB_04x1.00mm_Angled	J12
1	Conn_01x06	Socket_Strip_Angled_1x06_Pitch2.54mm	J13
1	Conn_01x06	Socket_Strip_Straight_1x06_Pitch2.54mm	J14
1	CWSA11AAN1H	CWSA11AAN1H	S1
1	100 nF	C_0402	C1
2	1 uF	C_0402	C2, C3
4	4.7k	R_0402	R1, R2, R8, R9

Modular aq sensor design files

The KiCad project lives in the open-seneca/modular-aq-sensor repository on GitHub; these links point at the commit this page was built from.

Layoutpcb files/v2/PCB.kicad_pcb
BOMpcb files/v2/BOM.xlsx

Modular aq sensor: common questions

How big is the Modular aq sensor PCB?

The Modular aq sensor measures 116.7 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Modular aq sensor?

25 components, from 18 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 Modular aq sensor design files?

From the open-seneca/modular-aq-sensor repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Modular aq sensor design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which open-seneca chose for the repository.

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