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Mqtt particle sensor

uw-madison-chem-shops·mqtt-particle-sensor·kicad/mqtt_particle_sensor.kicad_pcb

Mqtt particle sensor PCB layout, top view — open source AVR/Arduino board by uw-madison-chem-shops

About the Mqtt particle sensor PCB

Mqtt particle sensor is an open source AVR/Arduino PCB design by uw-madison-chem-shops, published on GitHub. It is a 2-layer board measuring 91.4 × 66 mm, with 24 components from 17 distinct parts.

Its main chip is the ATtiny85-20P, from the AVR/Arduino family. Other key parts include the CD4060BM96, HPM_Particle_Sensor and Adafruit_HUZZAH_ESP8266_breakout. By type, the board carries 9 resistors, 5 capacitors, 3 ICs, 2 transistors, 2 diodes and 1 module.

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

From the project

MQTT-enabled particle sensor project for the Wright Group.

Designed to work with mqtt.chem.wisc.edu.

This is an open source hardware project licensed under the CERN Open Hardware Licence Version 2 - Permissive. Please see the LICENSE file for the complete license.

This PCB was designed using KiCAD version 7. Refer to mqttparticlesensor.pdf for schematic. PCB images generated with tracespace follow.

This project uses micropython, specifically microhomie. Refer to the "firmware" directory in this repository for detailed instructions.

Main components on the Mqtt particle sensor

CD4060BM96ATtiny85-20PHPM_Particle_SensorAdafruit_HUZZAH_ESP8266_breakout

Mqtt particle sensor bill of materials (BOM)

24 components, 17 distinct parts.

QtyPartRefs
1
CD4060BM96
U1
1
ATtiny85-20P
U2
1
HPM_Particle_Sensor
U3
1
Adafruit_HUZZAH_ESP8266_breakout
A1
2
2N7000
Q1, Q2
1
Barrel_Jack
J2
1
VXO7805-500-M
PS1
2
LED
D1, D2
2
1u
C1, C2
1
100u
C3
1
10u
C4
1
22u
C5
1
470k
R1
2
1M
R2, R3
2
4.7k
R4, R5
2
1k
R6, R7
2
4k7
R8, R9

Mqtt particle sensor design files

The KiCad project lives in the uw-madison-chem-shops/mqtt-particle-sensor repository on GitHub; these links point at the commit this page was built from.

Mqtt particle sensor: common questions

What microcontroller does the Mqtt particle sensor use?

The Mqtt particle sensor is built around the ATtiny85-20P, from the AVR/Arduino family.

How big is the Mqtt particle sensor PCB?

The Mqtt particle sensor measures 91.4 × 66 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mqtt particle sensor?

24 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mqtt particle sensor design files?

From the uw-madison-chem-shops/mqtt-particle-sensor repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mqtt particle sensor design in my own project?

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

Can I test firmware for the Mqtt particle sensor without the hardware?

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

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