HardLabs

MQ Breakout

CaptainOrangeSparrow·early-fire-detection-classifier·hw/KiCAD/MQ-138-Reference-PCB/MQ Breakout.kicad_pcb

MQ Breakout layout, top view — open source board by CaptainOrangeSparrow

About the MQ Breakout

MQ Breakout is an open source PCB design by CaptainOrangeSparrow, published on GitHub. It is a 2-layer board measuring 22 × 38 mm, with 12 components from 9 distinct parts.

Other key parts include the ADS1115IDGS and OPA2350. By type, the board carries 4 resistors, 2 ICs, 2 capacitors, 1 relay and 1 diode.

It belongs with the sensors, audio and dev boards & breakouts designs in this gallery.

From the project

This repository aims to detect fires at an early stage and classify the type of fire using sensor-fusion techniques and machine learning. The project is from the University of Texas at Austin's engineering senior design group Spring 2026.

This repository aims to detect fires at an early stage and classify the type of fire using sensor-fusion techniques and machine learning. The project is from the University of Texas at Austin's engineering senior design group Spring 2026.

Git on the jetson is setup using the SSH key route. Any git actions will not prompt a log in due to the stored SSH deploy key. Pushes will be recorded as have been made by the deploy key. Whoever is registered on the jetson's git config global user.email will show up as the user responsible of a commit at the time of commit.

Main components on the MQ Breakout

ADS1115IDGSOPA2350

MQ Breakout bill of materials (BOM)

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

QtyPartRefs
1
ADS1115IDGS
MQ-X
U1
1
OPA2350
LM393
U2
2
HOLE_3.2mm
H1, H2
1
HEADER_MALE_4X1
K1
1
purple
D1
2
0.1uF
C1, C2
2
10k
R1, R3
1
TC33X-2-103E
R2
1
2k2
R4

MQ Breakout design files

The KiCad project lives in the CaptainOrangeSparrow/early-fire-detection-classifier repository on GitHub; these links point at the commit this page was built from.

MQ Breakout: common questions

How big is the MQ Breakout?

The MQ Breakout measures 22 × 38 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MQ Breakout?

12 components, from 9 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 MQ Breakout design files?

From the CaptainOrangeSparrow/early-fire-detection-classifier repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the MQ Breakout design in my own project?

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

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