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I need a complete electronic and mechanical design for a household-grade LPG gas detector that will be mounted in the kitchen. The unit must run from a 230 V AC mains supply and drive a 24 V, normally-closed solenoid valve through an on-board relay. An easy-to-read LED display will show status, alarm level, and basic fault codes. Core requirements • Sensing element: any reliable, readily available LPG sensor will do—I have no brand preference, so choose what best balances performance, lifespan, and cost. • Compliance: the finished design has to be ready for ATEX (or an equivalent) approval. Please factor appropriate component selection, spacing, enclosure venting, and intrinsic-safety practices into the schematics and layout. • Output logic: relay contact rated for the 24 V NC valve plus a test push-button and audible alert. • Power: integrate a small, isolated power supply module or discrete supply stage to step 230 V AC down safely for logic and sensor heating. • User interface: three-digit (or similar) LED readout, bi-colour status LED, and a hush/reset button. Deliverables 1. Block diagram, detailed schematics, and complete BOM (with manufacturer part numbers). 2. PCB layout files (Gerber, drill, pick-and-place) and 3D enclosure model suited to wall mounting. 3. Firmware source code and compiled binary ready to flash. 4. Test procedure covering calibration, fail-safe verification, and initial self-test routine. 5. Brief dossier outlining how the design meets ATEX or comparable requirements, so a certification body can pick it up without re-engineering. Acceptance is based on compiling the design, producing one working prototype that drives the NC valve and shows gas concentration on the LED display, and providing documentation that a certifier can use directly.
Project ID: 40385955
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33 freelancers are bidding on average $268 USD for this job

As an electrical engineer specializing in circuit design and embedded systems, I believe I am the ideal fit for your Home LPG Detector Design project. My absolute priority will be to ensure that the system is safe, reliable and compliant with ATEX or any comparable standards. With my deep knowledge and experience in electronics, power electronics, and embedded systems, I am well-versed in integrating isolated power supply modules and designing circuits for various detection systems. My expertise also extends to PCB design and layout which would be essential for your project. I work with Altium and can provide CAD files from manufacturers of your choice. Additionally, my background in Matlab will be advantageous as it will allow me to simulate and validate the performance of the 230 V AC step-down you require along with other complex requirements. Lastly, I understand the importance of clear documentation and having a design that is easy to maintain over time. With my attention to detail, I can easily provide you with everything you need; from detailed schematics, BOMs, PCB layout files, enclosure models to a tested operating firmware source code backed up by a thorough test procedure. Let's collaborate to make your home safer through this innovative gas detecting system!
$140 USD in 10 days
7.4
7.4

I am a skilled and reliable Embedded Systems Engineer with over 6 years of hands-on experience in Arduino, ESP32/ESP8266, and microcontroller-based development. I specialize in designing efficient, stable, and scalable embedded solutions, turning ideas into fully functional hardware-software systems. I have a strong background in electronics, sensors, communication protocols (UART, I2C, SPI, MQTT, WiFi, BLE), and real-time embedded systems. My development approach focuses on clean, well-structured, and well-documented firmware, ensuring long-term reliability and easy maintenance. I also provide thorough testing, debugging, and performance optimization, including power efficiency improvements where required. I am a detail-oriented engineer with strong problem-solving skills and extensive experience in hardware debugging and firmware optimization. Beyond technical expertise, I value clear communication, meeting deadlines, and maintaining high client satisfaction. I work closely with clients to fully understand project requirements and deliver high-quality results. Pricing is flexible and can be discussed based on project scope and complexity. I am open to both short-term and long-term projects. Let’s work together to build a professional, reliable, and efficient embedded system for your needs.
$250 USD in 7 days
7.4
7.4

With my extensive experience as an Electrical/Electronics Engineer for over 8 years, I offer you the skills needed to deliver an impeccable design for your LPG gas detector. From circuit design and PCB layout to Firmware and MATLAB programming, I possess the expertise to execute your project flawlessly. My particular proficiency in using Eagle, Altium, KiCAD, and EasyEDA for PCB design and Gerber, drill, pick-and-place for PCB layout makes me a proficient match for your project. Additionally, my experience in CAD/Housing Design using Fusion360 signifies that I can design a 3D enclosure model ideally suited for wall mounting. Moreover, my thoroughness encompasses the need to meet ATEX or comparable approval requirements in component selection, spacing, enclosure venting, and intrinsic-safety practices. I'm persistent about always delivering excellent results within stipulated timelines. So with me on board, you can be certain of having a working prototype that drives the NC valve and shows gas concentration on the LED display while adhering to the compliances requested. I look forward to turning your ideas into reality!
$140 USD in 7 days
6.8
6.8

With a name you can trust in electronic hardware and firmware design, my name is Marko and I have a extensive experience with all circuits including the ones which require a high level of safety like power supply conversion 230 V AC main. My grip on creating efficent LED driver circuits and RF PCB layouts will give you the reliable design that you are looking for. Additionally, I can readily help you with the firmware development phase as well. I hold a mastery of various communication protocols like UART, SPI, Ethernet, USB, CAN, and MODBUS which would allow seamless integration of different components as required by your project. To top it off, my skills do not just end with designing but also with a profound knowledge about testing procedures which could help us in calibration and to verify that your installation is fail-safe. The prototype I produce will justify why choosing me was the best decision for your project but let's start executing your idea into reality today by contacting me.
$140 USD in 7 days
6.7
6.7

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas: Antenna Design (CST, HFSS) Embedded C Programming. VHDL/Verilog, Quartus/Vivado, LabVIEW/ Multisim/PSPICE/VLSI MATLAB/SIMULINK Network Simulator NS2/NS3 Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32. IDEs like Keil MDK V5, ATmel studio and MPLab XC8. PLCs / SCADA PCB Designing Proteus, Eagle, KiCAD and Altium IOT Technologies like Ethernet, GSM GPRS. HTTP Restful APIs connection for IOT Communications. Also, we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements.
$140 USD in 7 days
6.1
6.1

Hello! I'm a highly skilled PCB Designer with over 10 years of expertise in delivering reliable and efficient PCB designs. I specialize in creating precision designs tailored to client's needs, utilizing top-tier design tools such as Altium Designer, Autodesk Eagle, KiCad, EasyEDA, Siemens PADS, DipTrace, Allegro/OrCAD, Fritzing and Proteus. My goal is always to ensure the highest quality and performance in every project. Core Expertise : • Schematic Capture & Layout Design • Component Selection & Library Management • Reverse Engineering (PCB Replication, PCB Cloning) • Gerber, BOM, and CPL File Generation & Manufacturing Support • Design for Manufacturability (DFM) and Design for Assembly (DFA) • PCB Design & Development (Single, Double, Multi-Layer, Flexible PCBs) Industries Served : • Medical Devices • Telecommunications • Consumer Electronics • Industrial Equipment • Automotive Electronics • Safety and Security Devices Why Choose Me? • Attention to Detail and Commitment to Quality • Strong Communication Skills & Client-Centric Focus • Timely Delivery & Flexible Approach to Meet Project Requirements I would love to help you with your next PCB design project. Feel free to reach out, and let’s discuss how I can bring your ideas to life! Best Regards, Utpal
$140 USD in 5 days
5.5
5.5

As a seasoned electrical engineer with years of rich experience in circuit design, electronics, and embedded systems, I'm confident I can deliver beyond your expectations for this Home LPG Detector project. From designing hardware and writing firmware to calibrating systems and conducting self-tests, my broad range of skills make me the perfect fit to handle all aspects of your project. One of the most important aspects of designing home security equipment is ensuring compliance with safety standards. Understanding this, I assure you that I'm adept at integrating intrinsic-safety practices into the schematics and layout for ATEX (or equivalent) approval. I guarantee a design complete with appropriate component selection, spacing, enclosure venting, and more that'll meet all necessary certifications straight out of the gate.
$77 USD in 1 day
5.5
5.5

Hi, I’m a senior electronics and embedded engineer with 10+ years of experience in power and sensor-based product design, having completed 20+ PCB projects and delivered multiple safety-focused devices with stable performance and low false alarm rates. I have solid experience in mains-powered circuits, relay control, and embedded firmware, ensuring a reliable and compliant LPG detector design. Approach ✅ I will design the system with a reliable LPG sensor, isolated AC-DC power supply, and safe front-end protection. ✅ I will create schematics and PCB layout with proper high/low voltage separation and relay control for the 24 V valve. ✅ I will develop firmware for gas detection, LED display, alarm logic, and self-test features. ✅ I will prepare enclosure design and complete files (BOM, Gerber, documentation) for production and certification. Questions ✅ I need to confirm the required certification standard (ATEX or similar). ✅ I need to know the display format (ppm or %LEL). ✅ I need the solenoid valve voltage/current details. ✅ I need to confirm if battery backup is required. Best, Yaroslav
$220 USD in 7 days
5.2
5.2

Hello, I have TOP NOTCH similar work on the Gas Safety & Control Systems Project. The project included PCB based detectors with relay outputs. Before moving forward, please confirm: Do you prefer the sensing element to be metal oxide semiconductor type or a more industrial grade catalytic bead sensor? Do you want the LED display to show numeric ppm values or just alarm/fault codes? Tools I Use • Altium Designer / KiCad / Eagle I am ready to deliver a LPG detector that balances safety, reliability, and manufacturability. The focus will be on sensor integration, safe power conversion, and clear user interface design. The design and documentation will be aligned with IEC and IPC standards. Best regards, Abubakar
$242 USD in 7 days
5.1
5.1

As a seasoned electrical engineer with a sharp focus on PCB design, I bring unmatched skills to the table for your home LPG detector project. Drawing from my extensive experience with full-spectrum electronic design, I am highly proficient in areas you require such as developing detailed schematics, BOM compilation and blazing-fast PCB layout (Gerber, drill, pick-and-place), which will be crucial for your project's success. My ability to meticulously incorporate your desired functional components while ensuring intrinsic safety practices aligns perfectly with your requirement for ATEX-compliant electronics. In addition to my prowess in hardware design, I’m equally competent in coding and firmware development. I can produce the working prototype you need,determine its gas concentration on LED display ,while also providing foolproof documentation essential for hassle-free certification processing. My ability to use multiple software tools aligns well with your need for various deliverables like a 3D enclosure model apt for wall mounting and the necessary firmware source code and compiled binary. Let me bring all these skills and experiences together to create a reliable and effective LPG detector that exceeds your expectations.
$122 USD in 3 days
4.9
4.9

Best LPG Gas Detector Design Expert! ⭐⭐⭐⭐⭐ Dear Client, The biggest risk in this project is not completing the detector—it’s delivering a design that appears functional but falls short on safety, reliability, or certification readiness when exposed to real-world gas conditions. That is where safety-critical design judgment matters. I would approach this by: 1. selecting and validating a reliable LPG sensing element with stable response, long lifespan, and proper calibration characteristics 2. designing a robust schematic including isolated AC-DC power supply, safe relay driving for the 24V NC solenoid valve, and protection circuits for fault conditions 3. building the PCB layout with strict attention to creepage/clearance, grounding, and intrinsic safety practices aligned with ATEX-ready design principles Two quick questions: ✅Do you have a preferred microcontroller platform, or should I select one optimized for safety and reliability? ✅Should the design prioritize cost optimization or certification readiness as the primary goal? If you message me, I can outline a complete architecture that aligns with ATEX-ready design practices and ensures a smooth path toward certification. Best regards, Prat PCB Must Innovations
$250 USD in 2 days
6.5
6.5

have seen your project detail. Where i did works from circuit design to PCB design(reducing cost, efficient circuit, BOM optimization, gerber release, testing PCB, PCB manufacturer follow up). I work Hardware design to PCB design where i have experience in altium professional design tool. also i work on firmware .checkout my portfolio for more details. Let's Discuss more.
$140 USD in 7 days
4.2
4.2

Hi, I specialize in embedded systems, power electronics, and safety-focused hardware design, and I can deliver a complete LPG gas detector solution covering both electronics and mechanical aspects, ready for certification pathways like ATEX. I will design a robust system including sensor selection, isolated AC to DC power stage from 230 V, and reliable relay control for your 24 V normally closed solenoid valve. The design will follow proper safety practices such as isolation, creepage and clearance, thermal management, and protection circuits to support certification requirements. You will receive complete schematics, BOM with manufacturer part numbers, PCB layout with production files, and a 3D enclosure design suitable for wall mounting with proper ventilation. I will also provide clean firmware, a test and calibration procedure, and documentation structured so a certification body can review it without rework. Ready to start and discuss your requirements in detail. Best regards, Jakub
$200 USD in 7 days
3.8
3.8

I developed an air-quality and leak detection system where sensors were used to detect hazardous gases and trigger alerts and control mechanisms. In this MQ2 and MQ135 gas sensor can be use and I already have both available for testing, and design the system to ensure stable readings, proper alarm logic, and safe actuation of the solenoid valve. I also have a fully equipped electronics lab where I can prototype, test, and validate the design to ensure it performs reliably before final delivery. Deliverables: 1. Block diagram and detailed schematics 2. Complete BOM with manufacturer part numbers 3. Multi-layer PCB design (Gerber, drill, pick-and-place files) 4. 3D enclosure design suitable for wall mounting 5. Firmware source code and compiled binary 6. LED display and user interface implementation For my approach, I start by selecting the right sensor and designing a safe and isolated power section from 230V AC. Then I build the sensing and control logic with proper filtering and calibration to ensure accurate detection. After that, I design the PCB with attention to safety, spacing, and reliability, and integrate the display and control features so the system is easy to use and dependable in real conditions.
$250 USD in 3 days
3.2
3.2

Hello, I can design your home LPG gas detector system with reliable sensing, stable signal processing, and safe alert functionality for real-time gas leakage detection. Experience & Skills: Strong experience in embedded systems, Arduino/ESP platforms, PCB design, sensor integration (gas, temperature, environmental), and firmware development. I have worked on multiple safety and monitoring-based electronic systems before, ensuring accurate sensing and stable performance. Relevant Project: I Developed a Smart Monitoring System with ESP-based real-time data tracking and alert system, involving sensor integration and reliable embedded design suitable for safety applications. I have worked on similar systems before and understand safety-critical requirements. I also have required gas sensors available for testing and validation. Timeline: I can complete this within 3 days.
$220 USD in 3 days
3.0
3.0

Hi, I can help you design a reliable LPG gas detector system with proper safety considerations, including sensor integration, power design, and automatic valve control. I have experience in embedded systems, PCB design, and control systems. I will focus on creating a stable design with safe AC power handling, accurate gas detection, and reliable relay-based shutoff for the solenoid valve. Scope: *LPG sensor selection and integration *AC to DC isolated power supply design *Relay control for 24V solenoid valve *LED display and user interface implementation *Firmware for sensing, display, and alarm logic *Basic enclosure and safety considerations Deliverables: *Schematic and PCB design files (Gerber, BOM) *Firmware source code *Basic enclosure design *Test procedure and documentation Approach: *Select reliable LPG sensor and design interface circuit *Develop safe power supply with isolation *Implement control logic for alarm and valve shutdown *Design PCB with safety spacing and protection *Test functionality and provide documentation I will ensure a practical and reliable design suitable for prototype development.
$200 USD in 25 days
2.0
2.0

I have reviewed your requirements for the LPG gas detector. To ensure safety in the Bahrain market, my proposal focuses on a fully solid state architecture. Mechanical relays are a liability. Their contacts create micro arcs during switching. In an LPG environment, a spark during contact closure can trigger a catastrophic explosion. Many designs ignore this, creating a time bomb in the kitchen. My design eliminates this by using Solid State High Side switching, providing arc less operation and diagnostics for Open Load and Short Circuit faults. Why this secures your project: Compliance: I provide a Certification Dossier including FMEA, creepage analysis, and thermal management. This moves your project from prototype to industrial ready, saving you time and lab costs. Fail Safe: My design uses deterministic firmware and interlocks, ensuring the valve defaults to a safe state upon system failure or power loss. Transparency: You receive complete BOMs, Gerber files, 3D models, and source code. No hidden constraints. Deliverables: Schematic and PCB for IEC/ATEX clearance. Certification Dossier with Risk Assessment. Firmware with fail safe routines. After 25 years experience I engineer reliable safety systems, not prototypes !. Let us build a product that passes the lab test first. A 3-digit LED display, a bi-colour status LED, an audible alarm are obligatory. Best regards, Aleksandar Makarevski Electronic Engineer BS.
$200 USD in 7 days
1.8
1.8

Being an Electronic Engineer, Hardware Designer and a skilled PCB Designer with 3 +years of experience I make proper R&D projects Full schematics and real life single layer ,2 layers ,4 layers ,6 layer and multi-layers PCBs projects (i.e: 1:PCB of compact ear buds 2:Pcbs for compact usb with advanced security features 3:Pcbs which involves USBs 4:Also i made many large projects which handles high voltage AC and DC 5: 6 -layers PCB of Arm Cortex Processor involving Programming 6: Programmable Frequency Generator PCB 7: Compact Smart SOS PCB 8: High Volatge Ac to DC Converter with MCU STM32 programmability’s for 10KW system 9: 10KW AC Inverter with output voltage 24V 10: Qi 1.3 Wirless Charger Transmitter and Reciever 11: PCB for agricultural watering system that controls 50 fig trees with expansion capability to 100 trees) 12: Custom IO Board Design for Raspberry Pi CM5 with Integrated RP2040 And many more I have advanced level grip on softawares like Easyeda-Pro ,Kicad, Altium I will show you my PCB work separately I will handle your project and made it perfect in the best cheapest price and do its customisation First see me work then Hire me You can also see my Portfolio which reflects some of my PCBs projects In the end i will assure you that you will get professional level and great quality work in the best price Thankyou
$65 USD in 7 days
1.5
1.5

Hey , I just finished reading the job description and I see you are looking for someone experienced in Circuit Design, Alarm Systems, PCB Layout, Electronics, Embedded Systems, PCB Design and Layout, Control System Design and Electrical Engineering. This is something I can do. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: 1. These are all the requirements? If not, Please share more detailed requirements. 2. Do you currently have anything done for the job or it has to be done from scratch? 3. What is the timeline to get this done? Why Choose Me? Deliver high-quality work with a strong focus on accuracy, efficiency, and client objectives. Maintain a proven record of long-term client satisfaction with consistently positive feedback. Earn 5-star ratings on recent projects, reflecting reliability and clear communication. Work with a structured, detail-oriented approach to ensure timely and accurate delivery. Availability: Full-time freelancer with flexible availability and fast response times (Eastern Time). I will share with you my recent work in the private chat due to privacy concerns! Please start the chat to discuss it further. Regards, Ali
$30 USD in 2 days
0.0
0.0

Creating a reliable LPG gas detector for household use is a critical safety challenge that requires meticulous design and engineering. With over 12 years of experience in electronic and mechanical design, I understand the importance of compliance with ATEX standards, as well as the need for a user-friendly interface for monitoring gas levels. I propose to leverage my expertise in PCB layout and embedded systems to develop a complete solution. Utilizing readily available LPG sensors, I will integrate an isolated power supply module, ensuring safe operation from the 230 V AC mains. The firmware will be designed with safety protocols, enabling precise calibration and fail-safe verification. Deliverables will include detailed schematics, PCB layout files, firmware source code, and comprehensive testing procedures—all aligned with regulatory requirements to facilitate certification. To ensure clarity in your project’s goals, could you specify any preferred brands or models for the LPG sensor? This would help tailor the component selection effectively. Looking forward to collaborating on this vital safety device!
$250 USD in 7 days
0.0
0.0

Manama, Bahrain
Member since Apr 20, 2026
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