2 layers162.3 × 96.5 mm
2 layers228.6 × 172.7 mm
PROJECT JUI
vedya017/PCBPCB design for harmful sewage gas detection
- Size
- 228.6 × 172.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 73
- Nets
- 102
- Pads
- 251
- Tracks, vias
- 348, 0
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 6 Sep 2025
- Updated
- 3 Jun 2026
Overview
PROJECT JUI is an open-source printed circuit board by vedya017, from the vedya017/PCB repository on GitHub. It is a 2-layer board of 228.6 × 172.7 mm with 73 parts on 102 nets, routed with 348 tracks and 0 vias.
It is built around the ARDUINO UNO R3 and PN2222A. Its parts include 32 resistors, 13 transistors, 12 diodes, 7 connectors and 6 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdArduino-Based Gas Sensor Detection System with Custom PCB Design
Designed and developed a custom PCB integrated with an Arduino Uno-based gas monitoring system for the detection of hazardous sewage gases, including hydrogen sulfide (H₂S), methane (CH₄), ammonia (NH₃), and carbon monoxide (CO). The system continuously acquires gas concentration data from multiple gas sensors, processes the readings through the Arduino controller, and compares them against predefined safety thresholds. When gas levels exceed permissible limits, the system generates immediate alerts through output indicators to warn workers of potentially dangerous conditions. Real-time gas concentration values are displayed on an LCD screen, LED lights, and buzzers for appropriate warning levels, enabling continuous environmental monitoring and improving safety in sewage and confined-space operations.
Project Flow: Gas Sensors → Signal Acquisition → Arduino Uno Processing → Threshold Comparison → LCD Display of Gas Concentrations → Hazard Detection → Alert/Warning Generation for Workers.
Parts
73| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | R | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1, R2, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23 +16 |
| 13 | PN2222A | Package_TO_SOT_THT:TO-92L_Wide | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13 |
| 12 | LED | LED_THT:LED_Oval_W5.2mm_H3.8mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12 |
| 5 | Conn_01x04_Female | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2, J3, J4, J5, J6 |
| 4 | YAAJ_DCDC_StepDown_LM2596 | KiCad_DC:YAAJ_DCDC_StepDown_LM2596 | U1, U2, U5, U6 |
| 1 | 4040 | Package_DIP:DIP-16_W7.62mm_Socket | U3 |
| 1 | 74LS47 | Package_DIP:DIP-16_W7.62mm_Socket | U4 |
| 1 | Arduino_UNO_R3 | Module:Arduino_UNO_R3_WithMountingHoles | A1 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_Wuerth_6941xx301002 | J1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | Conn_01x05_Female | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J7 |
| 1 | HDSP-516L | HDSP-511Y:LED_HDSP-511Y | DS1 |
Questions
How big is the PROJECT JUI PCB?
It measures 228.6 × 172.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PROJECT JUI use?
73 parts, built around the ARDUINO UNO R3 and PN2222A. 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 PROJECT JUI KiCad files?
From the vedya017/PCB repository on GitHub, at the commit this page was made from: the board is PROJECT_JUI.kicad_pcb and its schematic PROJECT_JUI.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PROJECT JUI design in my own project?
Its repository states no licence, so its author keeps all rights: ask vedya017 before reusing the design.
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