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I have three interconnected PCBs for an IoT-enabled cooking system and I need a fresh, expert set of eyes on the schematics before they move to layout and certification. My main objective is to drive up reliability while making sure every track and component choice can sail through both UKCA and CE assessments without last-minute redesigns. Here is the current state of play: • Power PCB – handles distribution and uses fully-isolated 12 V AC relays • Controller PCB – AVR32DD32 MCU with four MAX31865 RTD ADCs and RS-485 bus • UI PCB – ESP32 (external esp32 approved antenna), RS-485 bus, 5-inch EVE4 touch screen, 4 x multicolour LEDs and audio out The Power board, the Controller board and the UI board all matter equally to me in terms of long-term robustness. Schematics for the first two are at a point where I can get them to; the third will be ready for your review within a few days. What I’d like from you 1. Detailed schematic audit highlighting/fixing architectural issues, component stress margins, deratings, safety, EMC susceptibility and reliability traps. 2. Concrete design tweaks or alternative part suggestions that improve MTBF without driving BOM costs significantly. 3. A brief compliance checklist mapped to the relevant clauses of the UKCA and CE directives that apply to low-voltage and radio-enabled products. Acceptance criteria • Reviews and changes to be carried out on KiCad 9 schematics plus accompanying report. • Each suggested change justified with reference to reliability data or a specific regulation. If this sounds like your kind of project, let’s talk timing and any extra documentation you need.
Project ID: 40365869
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43 freelancers are bidding on average £840 GBP for this job

I can provide a thorough audit of your schematics, focusing on architectural issues, component stress margins, and safety features. With my experience in PCB design and compliance, I will ensure that the Power, Controller, and UI boards meet the rigorous reliability standards required. I will identify issues related to EMC susceptibility and suggest effective design tweaks or alternative components to improve MTBF without significantly increasing BOM costs. I am proficient in KiCad and can deliver a detailed report outlining my findings, including a compliance checklist aligned with relevant directives. Let’s discuss a timeline and any additional information you may need to get started. Best Regards, Hamza
£350 GBP in 1 day
7.8
7.8

As an experienced and passionate electrical engineer, I have honed my skills in circuit design and microcontroller-based systems, which make me an ideal candidate for your project. With comprehensive experience in digital motor control, power electronics, and embedded systems, I am well-versed in the nuances of ensuring reliable and robust designs. My expertise goes beyond just designing schematics; through years of work in renewable energy, I have acquired valuable knowledge about optimizing performance while managing costs - a skill that will be crucial as we look to enhance your schematics without inflating the BOM. One of my steadfast principles is meticulousness that drives me to leave no stone unturned. Building on this, I intend to conduct a thorough audit of your current IoT cooking system. From assessing track connectivity to suggesting design tweaks or alternative components to improve mean-time-between-failures (MTBF), you can rely on me to pay attention to the smallest the details. Besides technical proficiency, my usage of Orcad simulation tools, which aligns with your project's preference for KiCad 9 schematics, will facilitate seamless collaboration.
£750 GBP in 15 days
7.4
7.4

Hello, Your project is well-structured, but before layout and certification, a rigorous schematic audit is essential to avoid costly redesigns later. I can support this end-to-end. I will review all three PCBs focusing on power integrity, isolation boundaries, creepage/clearance, derating (relay, regulators, RTD front-end), and EMC risks (RS-485 robustness, ESP32 RF noise coupling, grounding strategy). I will also check failure modes, protection (TVS, fusing, reverse polarity), and long-term reliability (thermal stress, component margins). For improvements, I will propose targeted changes such as better isolation practices, optimized filtering, robust RS-485 biasing/termination, ADC accuracy protection, and component substitutions with higher MTBF—while keeping BOM impact minimal. You will receive annotated KiCad schematics plus a concise engineering report with each change justified (standards or reliability data). Additionally, I will map your design against UKCA/CE requirements (LVD, EMC, RED for ESP32) including practical checklist items for compliance readiness. I have extensive experience in multi-board embedded systems, industrial reliability, and certification-aware design. Please share schematics and any constraints (cost, enclosure, environment). Regards, Engineer Muhammad Usman
£925 GBP in 7 days
6.8
6.8

With over 8 years of experience in PCB design and a deep understanding of electrical engineering, I am confident I can bring fresh insights and enhancements to your IoT cooking system. My expertise in using platforms like KiCad, Eagle, Altium, and EasyEDA aligns perfectly with your project needs. Not only have I audited numerous complex schematics in the past for reliability, safety, and compliance, but I have also designed solutions that passed stringent certifications like CE. In addition, my proficiency in MATLAB/Simulink and Python programming will be valuable in carrying out design tweaks that both improve mean time between failures (MTBF) and optimize Bill of Materials (BOM) costs. I take a research-oriented approach to my work and will provide justifications for all suggested changes using reliability data or regulations. My attention to detail is unmatched when it comes to ensuring every track & component choice withstands the test of both UKCA and CE assessments. Furthermore, I pride myself on being available round-the-clock, and as a verified electrical/electronics engineer with accolades such as Preferred Freelancer ranking me among the top 1% on the platform, my priority is delivering high-quality work on time and within budget. Together we can enhance your PCBs' performance while maximizing reliability. Let's turn your ideas into rock-solid reality. Feel free to reach out to me anytime via chat or message!
£1,025 GBP in 7 days
6.9
6.9

As a seasoned electrical engineer with a strong background in circuit design, I have the expertise and skill set needed to give your IoT cooking schematics a comprehensive and meticulous review. In particular, I am well-versed in the standards and certifications required for low-voltage and radio-enabled products like yours, such as UKCA and CE directives. Drawing upon my extensive knowledge of component stress margins, safety standards, and EMC susceptibility, I will conduct a detailed audit of each of your PCBs to identify any architectural issues, reliability traps or compliance gaps that can be improved. Having substantial experience with KiCad 9, I'm completely comfortable working with your current schematic layout. Moreover, my approach to design changes is always data-driven. I utilize solid reliability data or specific regulations to justify any modifications or alternate part suggestions I make. This way, you can be confident that every change I propose has a practical basis for improving Mean Time Between Failures (MTBF) without significantly increasing Bill of Materials (BOM) costs. My profound effectiveness in PCB design will not only ensure enhanced reliability across all your boards but will also save you from any last-minute redesigns that can potentially delay your project's timeline.
£925 GBP in 7 days
6.6
6.6

With my robust background in PCB design, firmware development and RF design, I strongly believe that I possess the unique aptitude required to successfully refine your IoT cooking schematics. Throughout my career, I have specialized in transforming complex ideas into efficient, reliable designs, with a core focus on factors of functionality, safety and compliance. Your project requires a sharp eye for architectural details, stress margins, deratings and EMC susceptibility - precisely the areas where I excel. Drawing on my substantial experience with KiCad 9, I will meticulously scrutinize each of your PCBs, from Power to the Controller board, to the UI board. This comprehensive analysis will include suggesting design tweaks or alternative parts which can substantially enhance Mean Time Between Failure (MTBF), possibly even saving you significant Bill of Material (BOM) costs. By hiring me for your project, you're engaging an experienced professional who is committed to ensuring every aspect of your IoT-enabled cooking system is optimized for efficiency, safety and regulatory compliance. Let's team up to create an unparalleled product that you can rely on with confidence. So when do we get started?
£1,000 GBP in 7 days
6.7
6.7

Hi there, I carefully read your project description, and this is the kind of work I can support very well. Reviewing interconnected boards before layout and certification is exactly the right stage to improve reliability, reduce redesign risk, and catch compliance issues early. I’m Samuel Tshibangu, a mechatronics engineer with several years of hands-on experience in PCB design, embedded electronics, and system-level hardware review using Altium Designer. I have worked on multi-board embedded systems, isolated power/control interfaces, ESP32-based designs, MCU boards, communication buses such as RS-485, sensor interfaces, and robust electronic architectures intended for real-world use. I’ve already worked with the types of components and subsystems mentioned in your project, so I can get through the review efficiently and provide practical, justified recommendations. What I can bring to your project is a detailed and methodical schematic audit focused on reliability, derating, EMC-aware design, safety, and manufacturability, while keeping BOM impact under control. I can also provide clear notes and recommendations that help you move toward UKCA and CE readiness with fewer surprises later in the process. I’m confident I can help you complete this faster and more safely by identifying issues early and proposing realistic improvements. Feel free to send me a message so we can review the schematics and supporting documents. Best regards, Samuel Tshibangu
£400 GBP in 1 day
6.3
6.3

Hello! I'm Abdul, an experienced Embedded Systems Engineer and PCB Designer with an impressive range of technical competencies. I've worked on and impeccably managed numerous IoT projects throughout my career, making me the ideal candidate to take on your interconnected PCB designing task. With a thorough understanding of microcontroller programming, electronic development boards, single board computers, electronics modules, and computer software such as KiCAD which you require for this project, rest assured of top-notch results. Let's bring your ideas to life innovatively and precisely while ensuring your long-term robustness requirements are met with the highest standards!
£925 GBP in 3 days
6.5
6.5

Hi, KINDLY READ THROUGH MY PROPOSAL I will deliver a thorough schematic audit and reliability upgrades for all three PCBs (Power, Controller, UI) to guarantee long-term robustness and first-pass UKCA/CE compliance. MY APPROACH ✅ Full review of isolated 12 V relays, AVR32DD32 + MAX31865 RTD chains, RS-485 bus, ESP32 antenna integration and EVE4 UI ✅ Identify and fix component stress, derating, EMC susceptibility, ground loops and safety gaps ✅ Recommend targeted part swaps and layout tweaks for higher MTBF at minimal BOM cost ✅ Map every change to relevant LVD, EMC and RED clauses with a compliance checklist ✅ Work directly in your KiCad 9 files with clear annotations RELEVANT PROJECTS • Multi-PCB industrial cooking appliance (power + AVR controller + ESP32 UI) with isolated relays and RS-485 that passed UKCA/CE on first submission DELIVERABLES • Annotated KiCad schematics with all fixes • Detailed audit report + UKCA/CE compliance checklist QUESTIONS 1 Can you share the current KiCad files for Power and Controller PCBs now? 2 When will the UI PCB schematic be ready? 3 Any specific concerns (relay isolation, RTD noise, ESP32 EMI)? 4 Target timeline for the review? Ready to start immediately.
£450 GBP in 5 days
6.3
6.3

I am an Electrical Engineer with 7+ years of experience in PCB and embedded system design. I have designed up to 8-layer PCBs including mixed-signal, high-speed digital, power, and analog circuits. I also have strong firmware development experience. I can review your Power, Controller, and UI schematics in KiCad 9, focusing on reliability, derating, EMC, and CE/UKCA compliance. I will suggest practical improvements, component alternatives, and provide a clear compliance checklist. I aim to deliver robust, production-ready designs without increasing BOM cost significantly. Let’s discuss your timelines and files.
£925 GBP in 7 days
6.6
6.6

Hi, This is a strong fit for my experience. I have 6+ years in embedded systems and PCB design, including mixed-signal control boards, ESP32-based systems, power electronics, and reliability-focused hardware review. I can review your three-board system with focus on: • architectural robustness • derating, stress margins, and protection • EMC / noise susceptibility • safety and reliability risks • practical design improvements without unnecessary BOM inflation I’m comfortable working in KiCad and can provide: • annotated schematic review • recommended changes with justification • component and architecture improvement suggestions • a compliance-oriented checklist to support UKCA/CE readiness Relevant experience includes control boards, sensor-heavy embedded systems, RS-485 interfaces, ESP32 designs, and production-oriented hardware development. Best regards, Jesutofunmi
£1,500 GBP in 7 days
5.8
5.8

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.
£1,500 GBP in 7 days
6.1
6.1

Hi, I have solid experience with multi-board IoT systems (power, RS-485, ESP32, RTD/ADC), focusing on reliability and compliance-ready design. I can provide: • Thorough schematic audit (derating, protection, EMC, reliability risks) • Practical improvements to increase MTBF without raising BOM • UKCA/CE-focused checklist to avoid redesigns Experienced with KiCad 9 and similar architectures, so I can quickly identify issues and optimize your design. Ready to start with Power & Controller boards immediately. Best regards,
£925 GBP in 7 days
5.3
5.3

Hi, find my TOP NOTCH similar work on the IoT Appliance PCB Review Project. The project included schematics for compliance. Before moving forward, please confirm: Do you want me to suggest alternative components with longer MTBF ratings even if they slightly increase BOM cost, or keep strictly within the current budget envelope? Project Deliverables • Schematic audit report • Components and BOM files (Feel free to ask if you would like to add any additional deliverables.) Tools I Use • KiCad • ETAP • Excel I am ready to deliver a comprehensive schematic audit that strengthens reliability, ensures compliance, and minimizes redesign risk before layout. The focus will be on manufacturability, and regulatory readiness. The documentation will be aligned with IEC and IPC standards. Best regards, Abubakar Muhammad
£833 GBP in 7 days
5.1
5.1

With my extensive experience in industrial Automation, focusing on areas such as wastewater treatment, water treatment plants, and more, I have amassed the necessary skills to thoroughly analyze and optimize your IoT cooking schematics. Having worked with leading-edge technologies such as Siemens TIA Portal, Simatic Manager, and WinCC SCADA among others, I adopt a meticulous approach to system design. I have carried out numerous (PTP) point-to-point tests and automation tests ensuring a highly reliable outcome for my clients. Process optimization and upholding safety standards have always been at the forefront of my work philosophy. This ability regularly informs me about all relevant clauses of UKCA and CE directives connected to low-voltage and radio-enabled products in your project description. I am confident that my knowledge in this sector will be crucial during your project’s checklist mapping process. My practical experience working with systems similar to yours gives me an advantageous perspective in identifying architectural issues, component stress margins, safety concerns, EMC susceptibility, and reliability issues ahead of time. All these strengths make me the ideal candidate for helping you enhance your project's overall efficiency while fulfilling its compliance requirements without driving up BOM costs.
£925 GBP in 21 days
5.1
5.1

Hi, I am a U.S.-based certified electronics and embedded firmware engineer with extensive experience performing reliability and compliance-focused schematic audits for multi-board IoT systems. I have worked with isolated power architectures, AVR and ESP32 platforms, RS-485 networks, and precision sensing chains (including RTD front ends), with a strong focus on EMC robustness and long-term field reliability. I will deliver a thorough KiCad 9 schematic review of your Power, Controller, and UI PCBs, assessing architecture, derating, protection, isolation, grounding, and signal integrity. All findings will be supported with clear engineering justification and aligned with relevant standards for UKCA and CE compliance, including low-voltage and EMC requirements. You will receive annotated schematics, targeted design improvements, and cost-conscious component recommendations to enhance MTBF without inflating BOM. Additionally, I will provide a concise compliance checklist mapped to applicable regulatory clauses to support certification readiness. I am available to begin immediately and can coordinate on timelines and supporting documentation to ensure an efficient review process. Best regards, Jared
£1,000 GBP in 7 days
4.7
4.7

With a background in IoT, PCB design, and embedded development, I am confident that my team and I can provide the expertise and knowledge you need to verify and enhance your IoT cooking schematics. We don't just stop at designing hardware—we ensure it functions smoothly within larger systems such as ERPs through our adept understanding of artificial intelligence. This is particularly advantageous in your project as you seek long-term reliability and regulatory compliance. I'm thoroughly experienced in the KiCad 9 platform which your project requires, and rest assured that every suggested change will be fully justified with specific references to relevant regulations or reliability data. My past projects include designing fully-isolated 12 V AC relays similar to those used in your Power PCB, ensuring they comply with safety regulations while optimizing their performance. Moreover, I have a keen understanding of component stress margins, deratings, safety factors, EMC susceptibility, and reliability traps—essential for not only ensuring regulatory compliance but improving MTBF without significantly driving up BOM costs. Overall, the aim of my work has always been to deliver high-functioning products that are secure, compliant, and reliable—objectives that mirror those of this project. Grabbing this opportunity would allow us to combine our skills in circuit design and electrical engineering to produce an outstanding output for you!
£925 GBP in 7 days
4.5
4.5

Best Reliability & Compliance-Focused Schematic Review Expert! ⭐⭐⭐⭐⭐ Dear Client, This project is not just a design review. What you really need is a schematic audit that improves long-term robustness while reducing the chances of painful redesigns later during layout, testing, UKCA, or CE review. That is where I can help. From your scope, the important part is not only checking whether the circuits function. It is identifying stress-margin issues, derating weaknesses, safety gaps, EMC vulnerability, and design choices that could quietly hurt MTBF or compliance confidence across all three boards. That is exactly the stage where an experienced review can save a lot of downstream cost. I would approach this as a reliability-first schematic audit: check the power board, controller board, and UI board as one connected system, recommend targeted changes that improve robustness without inflating BOM cost, and document the rationale clearly enough that the next engineering step stays controlled. A few quick questions: 1. Are the relay loads and external interfaces already fixed, or still open to protection-related refinement? 2. Do you want the review output organized board-by-board, or grouped by risk category such as power, EMC, safety, and reliability? If you message me, I can also explain how I would structure the review so you get actionable engineering decisions, not just generic comments. Best regards, Prat PCB Must Innovations
£1,000 GBP in 7 days
6.4
6.4

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq
£900 GBP in 7 days
4.7
4.7

Hi there, I’m confident I can deliver this project to a high standard and meet all technical requirements. I’m a senior PCB and embedded systems engineer with 10+ years of experience in high-current power electronics, ESP32 control systems, and production-ready PCB design. I’ve delivered multiple 30–50A smart relays, motor drivers, and IoT power boards with strong focus on thermal management, EMI control, and Wi-Fi-friendly layouts. For your project, I will review the Altium files, verify the power path for stable 30A operation, optimize copper pours, trace widths, via stitching, and thermal performance, and implement the digital soft-start for the MOSFET bank. I will also validate ESP32 GPIO, sensor interfaces, and wireless performance. Deliverables include updated Altium files with annotations, JLCPCB-ready Gerbers, drill and pick-and-place files, reviewed BOM, assembly outputs, and a short engineering test report including soft-start waveform and functional verification. I work directly with clients, communicate clearly, and ensure a clean production-ready board with no outsourcing. I’m available to start immediately. Best regards
£400 GBP in 5 days
3.9
3.9

Worcester, United Kingdom
Member since Apr 12, 2026
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