8 layers167.2 × 95.4 mm
4 layers77.1 × 39.9 mm
LEL Detector
citrineio/LEL-Detector11This project takes inspiration from my current job as a control and instrumentation engineer in the oil and gas industry.
- Size
- 77.1 × 39.9 mm
- Copper layers
- 4
- Thickness
- 4.69 mm
- Parts
- 77
- Nets
- 78
- Pads
- 269
- Tracks, vias
- 584, 138
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 15 Oct 2022
- Updated
- 16 Oct 2022
Overview
LEL Detector is an open-source printed circuit board by citrineio, from the citrineio/LEL-Detector repository on GitHub. It is a 4-layer board of 77.1 × 39.9 mm with 77 parts on 78 nets, routed with 584 tracks and 138 vias.
It is built around the TC2030-IDC-NL, M2.5 and DMN65D8L-7(ES), with the G6L-1P-DC3, TB002-500-02BE and B3FS-1002P among its other parts. Its parts include 29 capacitors, 13 resistors, 8 ICs, 4 diodes and 3 connectors.
Main components
7
TC2030-IDC-NL
UncategorisedTag ConnectM2.5
-0.45mm 2.5mm 2mm 5mm DIN934 Hex M2.5X0.45 Nickel plated Silver white - Hexagonal nutsShuntianHex Nut
DMN65D8L-7(ES)
SOT-23SOT-23 MOSFETs ROHSElecSuperMOSFETs
G6L-1P-DC3
插件-40℃~+70℃ 1 Set Normally Open: 1A (SPST NO) 1A 3V 5ms 5ms 60V@DC、125V@AC 插件 Signal Relays ROHSOmronSignal RelaysTB002-500-02BE
插件插件 Screw Terminal Blocks ROHSCUIScrew Terminal Blocks
B3FS-1002P
SMD-4P,6.3x6mm-25℃~+70℃ 1.5N 24V 3.1mm 50mA 6.3mm 6mm Gull Wing Round Button SPST Surface Mount,Vertical SMD-4P,6.3x6mm Tactile Switches ROHSOmronTactile SwitchesTB003-500-P03BE
插件,P=5mm-40℃~+105℃ 1 10A 14~26 1x3P 3 300V 3P 5mm Blue 插件,P=5mm Screw Terminal Blocks ROHSCUIScrew Terminal Blocks
README
readme.mdProject Description
This project takes inspiration from my current job as a control and instrumentation engineer in the oil and gas industry. We have to deal with the risk of combustible or toxic gases leaks and one of the mandatory protection mechanisms is having a gas detection system. I designed a detector for combustible gases especially H2 which utilizes a common communication protocol to send data to the main controller in the system.
This project incorporates the following:
- SGP30 air quality sensor with H2 detection capability
- STM32F103 microcontroller
- LTC2631ITS8 I2C DAC with voltage output
- AD5749 4-20mA transmitter IC to send data to a connector and then to the control system.
- AOM12864A0 1.54" OLED display for reading the sensor's value.
- Two Omron relays for controlling and signaling an alarm light and a horn during a gas leak.
Block Diagram
Board Images
Repository Guide:
3D:
3D model of the PCB, 3D models of the components are also available in the dedicated folder.
PCB Layout:
The latest Kicad PCB layout file is here. You can find component land patterns (aka footprints) in the dedicated folder.
Schematics:
The latest Kicad schematics capture files are here. PDF version will be updated weekly during the schematics capture phase. You can also find the schematics symbols in the dedicated folder.
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100n | LEL DETECTOR:CAPC1005X55N_1n2 | C102, C103, C104, C105, C107, C114, C115, C116, C120, C125, C128 |
| 8 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | 1V8, 3V3, 5V101, 24V101, GND101, IFAULT101, TEMP101, VFAULT101 |
| 5 | 4u7 | LEL DETECTOR:MURATA_4u7_0603 | C122, C123, C124, C126, C127 |
| 4 | M2.5 | MountingHole:MountingHole_2.7mm_M2.5 | H101, H102, H103, H104 |
| 3 | 100k | LEL DETECTOR:RESC1005X40N | R103, R107, R112 |
| 3 | 10K2 | LEL DETECTOR:RESC1005X40N | R105, R110, R111 |
| 3 | 10u | LEL DETECTOR:SAMSUNG_10u_0603 | C101, C112, C129 |
| 3 | 1K96 | LEL DETECTOR:RESC1005X40N | R101, R104, R106 |
| 2 | 10p | LEL DETECTOR:CAPC1005X55N_1n2 | C113, C118 |
| 2 | 10u | LEL DETECTOR:CAPC3225X270N_10U | C106, C108 |
| 2 | 2K2 | LEL DETECTOR:RESC1005X40N_2K2 | R108, R113 |
| 2 | 47u | LEL DETECTOR:CAPC3225X270N_10U | C119, C121 |
| 2 | DMN65D8L-7 | LEL DETECTOR:DMN65D8L-7_MOSFET | Q101, Q102 |
| 2 | G6L-1P-DC3 | LEL DETECTOR:RELAY_G6L-1P-DC3 | K101, K102 |
| 2 | SOD-323_SDS | LEL DETECTOR:1N4148WSTR | D102, D103 |
| 2 | TB002-500-02BE | LEL DETECTOR:CUI_TB002-500-02BE | J103, J104 |
| 1 | 15K | LEL DETECTOR:RESC1005X40N | R109 |
| 1 | 1n2 | LEL DETECTOR:CAPC1005X55N_1n2 | C110 |
| 1 | 1p | LEL DETECTOR:CAPC1005X55N_1n2 | C109 |
| 1 | 30v | LEL DETECTOR:RB080LAM-30TR | D101 |
| 1 | 330n | LEL DETECTOR:CAPC1005X55N_330n | C117 |
| 1 | 34K | LEL DETECTOR:RESC1005X40N | R102 |
| 1 | 8n2 | LEL DETECTOR:CAPC1005X55N_1n2 | C111 |
| 1 | 8u2 | LEL DETECTOR:IHLP2525CZER8R2M01 | L101 |
| 1 | AOM12864A0-1.54WW-ANO | LEL DETECTOR:AOM12864A0-1.54WW-ANO_DISPLAY | DS101 |
| 1 | B3FS-1002P | LEL DETECTOR:B3FS-1002P_BUTTON | SW101 |
| 1 | CP_32_2_ADI | LEL DETECTOR:AD5749ACPZ | U104 |
| 1 | Crystal | LEL DETECTOR:ABM8G16000MHZB4YT | Y101 |
| 1 | D8 | LEL DETECTOR:TPS54331DR | U103 |
| 1 | D_Zener | LEL DETECTOR:SMAJ40A-13-F_TVS | D104 |
| 1 | LQFP48-7x7mm | LEL DETECTOR:STM32F103C8T6 | U102 |
| 1 | SGP30-2.5K_SEN | LEL DETECTOR:SGP30-2.5K | U107 |
| 1 | SOT-8_TS_LIT | LEL DETECTOR:LTC2631ITS8-HZ10-TRMPBF | U101 |
| 1 | SOT89-5_DIO | LEL DETECTOR:AP7361C-33Y5-13 | U105 |
| 1 | TB003-500-P03BE | LEL DETECTOR:CUI_TB003-500-P03BE | J102 |
| 1 | TC2030-IDC-NL | LEL DETECTOR:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | U108 |
| 1 | TLV74118PDBVR | LEL DETECTOR:SOT95P280X145-5N_1V8 | U106 |
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Questions
How big is the LEL Detector PCB?
It measures 77.1 × 39.9 mm and has 4 copper layers, 4.69 mm thick.
What parts does the LEL Detector use?
77 parts, built around the TC2030-IDC-NL, M2.5, DMN65D8L-7(ES) and G6L-1P-DC3. 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 LEL Detector KiCad files?
From the citrineio/LEL-Detector repository on GitHub, at the commit this page was made from: the board is PCB Layout/LEL Detector.kicad_pcb and its schematic Schematics/LEL Detector.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LEL Detector design in my own project?
Its repository states no licence, so its author keeps all rights: ask citrineio before reusing the design.