Madzigraphix/urbanbreatheOverview An embedded system designed to monitor ambient air conditions in real time. It captures data on key pollutants and environmental parameters to assess air quality, classify hazard levels, and log or transmit…
Air monitoring is an open-source printed circuit board by Madzigraphix, from the Madzigraphix/urbanbreathe repository on GitHub. It is a 2-layer board of 133 × 93 mm with 29 parts on 47 nets, routed with 494 tracks and 43 vias.
It is built around the ATMEGA328-AU, DHT11 and LM2596S-ADJ, with the MQ-6 among its other parts. Its parts include 5 ICs, 3 capacitors, 3 resistors, 3 diodes and 3 switches. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Group Members and roles:
Overview An embedded system designed to monitor ambient air conditions in real time. It captures data on key pollutants and environmental parameters to assess air quality, classify hazard levels, and log or transmit data for analysis and response.
Working
Data Acquisition The system uses environmental sensors to measure:
Particulate Matter (PM2.5, PM10)
Carbon Monoxide (CO)
Nitrogen Dioxide (NO₂)
Temperature and Humidity
Signal Processing Raw analog/digital data from sensors is processed through a microcontroller. Noise is filtered out, and readings are normalized and scaled.
Air Quality Index Calculation The processed values are mapped to standardized AQI ranges. The system calculates an overall air quality score based on pollutant concentrations using a weighted formula.
Classification The AQI value is categorized into levels (e.g., Good, Moderate, Unhealthy). These levels guide public awareness or automated responses.
Data Handling
Logged locally to memory or SD card
Optionally transmitted to a remote server or cloud via Wi-Fi/GSM
Continuous Monitoring The system performs regular sampling at set intervals. The loop ensures ongoing air status tracking and historical trend capture.
Trello link https://trello.com/b/yV4AvyV6/team
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | R | Resistor_SMD:R_0805_2012Metric | Push1, Push2, Push3, Reset1 |
| 1 | 1.21 k | Resistor_SMD:R_1206_3216Metric | R2 |
| 1 | 100u | Capacitor_SMD:CP_Elec_8x10 | C2 |
| 1 | 100u | Capacitor_SMD:CP_Elec_6.3x5.4 | C4 |
| 1 | 1N5822 | Diode_THT:D_5W_P10.16mm_Horizontal | D2 |
| 1 | 20 uH | Inductor_SMD:L_Bourns_SRR1260 | L3 |
| 1 | 220u | Capacitor_SMD:CP_Elec_10x10 | C3 |
| 1 | 33 uH | Inductor_SMD:L_Bourns_SRR1260 | L2 |
| 1 | 50 k | Potentiometer_THT:Potentiometer_Bourns_3296Y_Vertical | RV2 |
| 1 | ATmega328-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U4 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | Buzzer | Buzzer_Beeper:MagneticBuzzer_ProSignal_ABT-410-RC | BZ1 |
| 1 | C | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | VccCap1 |
| 1 | DHT11 | Sensor:Aosong_DHT11_5.5x12.0_P2.54mm | U1 |
| 1 | L | Inductor_THT:L_Axial_L6.6mm_D2.7mm_P10.16mm_Horizontal_Vishay_IM-2 | L4 |
| 1 | LCD Contrast | Potentiometer_SMD:Potentiometer_Bourns_3314G_Vertical | RV1 |
| 1 | LCD-016N002L | Display:LCD-016N002L | U3 |
| 1 | LD271 | LED_THT:LED_VCCLite_5381H5_6.35x6.35mm | D3 |
| 1 | LD271 | LED_THT:LED_VCCLite_5381H3_6.35x6.35mm | D1 |
| 1 | LM2596S-ADJ | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U5 |
| 1 | MQ-6 | Sensor:MQ-6 | U2 |
| 1 | Mode | Button_Switch_SMD:SW_SPST_PTS647_Sx50 | SW1 |
| 1 | R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | R | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | Reset | Button_Switch_SMD:SW_SPST_PTS647_Sx50 | SW3 |
| 1 | Select | Button_Switch_SMD:SW_SPST_PTS647_Sx50 | SW2 |
It measures 133 × 93 mm and has 2 copper layers, 1.6 mm thick.
29 parts, built around the ATMEGA328-AU, DHT11, LM2596S-ADJ and MQ-6. 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.
From the Madzigraphix/urbanbreathe repository on GitHub, at the commit this page was made from: the board is electrical/PCB Design/PCB-Design/Air monitoring.kicad_pcb and its schematic electrical/PCB Design/PCB-Design/Air monitoring.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask Madzigraphix before reusing the design.
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