ESP32 Traffic Light Controller PCB (24/7, Relays, Watchdog, Failsafe)

@macroenergy

As an experienced electronics/PCB engineer with a robust portfolio, I'm confident in my ability to design and develop complex systems with safety and reliability as a top priority. My expansive skillset spans from digital motor control to power electronics, renewable energy and, importantly, PCB design — all of which will be integral in successfully completing your traffic light controller project. Having gathered significant experience in working with the ESP32 MCU for applications such as yours, I understand the importance of designing for constant, optimal operation - this includes integrating a failsafe feature that cuts off power on any disruption like watchdog timeout or ESP32 crashes. For further safety contingencies, I propose using not just the internal watchdog of the ESP32, but also an independent external hardware that can monitor and supervise the system. Circuit design is one of my proven strong suits; my areas of expertise include industrial electronics and AC mains — both highly pertinent to this project. Signal integrity and safety standards are sacrosanct to me; I'll ensure there's proper 220VAC clearance/creepage plus clear separation of HV and LV sections on the PCB. My familiarity with femme easyeda will streamline our collaboration & delivery.

@markoa7

Hello, With a keen eye for detail, I guarantee designing and developing a traffic light controller PCB that meets your safety-critical needs. Having substantial experience with ESP32 hardware, AC mains, and industrial electronics, I specialize in creating fail-safe systems to ensure reliable and continuous operation. From utilizing shift registers to designing relay drivers with flyback protection, I'm well-versed in every aspect of your project requirements. Moreover, my expertise extends beyond PCB design. I also boast a strong background in firmware development that encompasses microcontroller programming and proficiency using various communication protocols such as UART, SPI, Ethernet, USB, CAN, and MODBUS - all of which will be crucial for seamless integration of your traffic light system. Lastly, my commitment to delivering cost-effective and high-quality solutions is unwavering. I appreciate the challenge presented by your project and am eager to overcome it successfully. Let's connect soon to discuss how my skillset can ensure the safety and reliability of your traffic light system. Thanks!

@mairajali11

As an experienced Electrical/Electronics Engineer and Professional PCB Designer with a solid 8-year track record, I am confident that I am the perfect fit for your traffic light controller PCB project. I have significant experience working with AC mains/industrial electronics and designing fail-safe systems, which aligns perfectly with your safety-critical project's needs. Notably, my proficiency in EasyEDA makes it a breeze for me to design reliable PCBs just like you require and ensures that the final deliverable meets the highest standards of quality and reliability. Additionally, my deep comprehension of Embedded Systems design including ESP32 hardware as well as my ability to program using C/C++ would be a great asset to efficiently handle your 24/7-operating system without compromising its functionality in case of failures. As a top 1% Preferred Freelancer and a detail-oriented professional, rest assured that partnering with me will prioritize turning your ideas into reality while consistently ensuring on-time delivery and budget friendliness. Please take a look at my portfolio for some sample work to help give you an idea of what I have accomplished so far - all proof of commitment to excellence I will bring to bear on your project. Let's discuss this further -- you have my undivided attention 24/7.

@Adeel2k14

I am an experienced electronics and PCB design engineer with strong background in ESP32-based and industrial control systems. I understand this is a 24/7, safety-critical traffic light controller requiring strict fail-safe behavior. I can design a reliable PCB using ESP32 with 74HC595-driven relay outputs, proper flyback protection, hardware pull-ups on OE, and controlled startup sequencing. I will implement an external hardware watchdog and reset supervisor that drops a master relay on MCU failure, watchdog timeout, or power instability. I have experience with 220VAC designs, proper creepage/clearance, HV/LV isolation, current-based lamp failure detection, and EasyEDA manufacturing-ready deliverables.

@PCBDESIGNER38

As a highly competent and experience PCB Design Engineer, I offer the essential skills needed to execute your project effectively. Having successfully designed PCBs for a range of applications, including power electronics, IoT devices, industrial control systems and RF communication boards, I'm confident in providing you with the high level of expertise required for this traffic light controller project. 5 years working on industrial electronics in my toolkit means I can comfortably handle projects that require AC mains competence and designing fail-safe systems. Your project's emphasis on reliability aligns perfectly with my commitment to reducing costs while improving performance and ensuring a quick time-to-market delivery. Using EasyEDA and other tools like the Easy EDA by you on your free account since it should be fairly independent, I'm poised to deliver a manufacturable PCB that meets your needs. Additionally, I'll ensure proper 220VAC clearance/creepage as well as clear separation between HV and LV sections. My ability to comprehend designs from schematic captures through to final testing coupled with extensive experience using small microcontrollers like the ESP ones will virtually guarantee your utmost satisfaction with the finished product. Lets get started!

@hayat38402

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:  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.

@shykhAbubakar

Hello, I can design a safety-focused ESP32-based traffic light controller PCB capable of reliable 24/7 operation, covering relay control architecture, fail-safe hardware design, and industrial-grade power protection. The focus will be on deterministic startup behavior, watchdog-enforced safety shutdown, and strict separation of high-voltage and low-voltage domains. All work will follow safety-oriented PCB design practices, AC mains clearance standards, and production-ready DFM guidelines. Following are the deliverables: • Schematic design and PCB layout in EasyEDA • Gerber, Pick- and- Place, Drill files for manufacturing • Bill of materials I wanted to ask: • Are there enclosure size or mounting constraints? I have 7+ years of experience in projects like: • Industrial ESP32 control hardware • AC mains relay and power control systems Thank you for considering my proposal. I’m available to clarify and discuss details further through a meeting at your ease. Best Regards, Abubakar

@SMBelectronics

Hello, I’m Abbas Jawadwala, from SMB ElectroTech—a specialized electronic product development company with 6+ years of experience delivering production-ready electronics solutions, not just prototypes. Unlike most bids here, we operate as a dedicated engineering team, supporting clients across: 1. Electronics Hardware & PCBs (up to 32 layers) 2. Embedded firmware & RTOS development 3. IoT, cyber-physical systems & smart devices 4. Review, Diagnostics and troubleshooting Rather than writing a long pitch here, I’d prefer to talk through what you’re building, the expectations for this role, and how I could support the team on a quick call. If this aligns with what you’re looking for, please click the blue “Chat” button to start the conversation—I’d be happy to discuss your project in detail. Best regards, Abbas Jawadwala SMB ElectroTech PS :-To understand the quality of work we deliver, I recommend reviewing our Freelancer profile and the projects we’ve completed.

@redbrickamerica

Hello! We are well-versed in ESP32 hardware and industrial electronics. Our team guarantees a reliable, 24/7-operating traffic light controller PCB with safety as the top priority. Using EasyEDA, we'll design a fail-safe system with MCP-driven relay outputs, including a master relay for added protection. We ensure a robust watchdog system and lamp failure detection with proper clearance for safety. Let's start this critical project to deliver a secure and efficient solution. Cheers, RedBrick American Engineering

@soltracker

Respected Sir,...Its me Imad, have done multiple projects regarding esp32 control and monitoring. Thanks for posting the job.....feel free to talk.......................

@nabeelraza1993

Hello sir, a traffic-light controller PCB only works as a true 24/7 safety system when the fail-safe path is hardware-enforced and the supervisor can shut everything down even if the ESP32 is completely hung. Well, what I can do for you as an Electronics engineer with 8+ years of experience is design a reliable ESP32-based traffic light controller PCB with ~19 relay channels . I’ll also implement an external hardware reset supervisor with a heartbeat from the ESP32, and a practical current-sense lamp-failure detection approach. In fact, I have designed both digital logic and high-power control electronics such as an 8-bit SAR (Successive Approximation Register) logic circuit for ADC control and a 10,000-watt LED dimmer controlled via Arduino so I’m comfortable with timing-critical digital interfacing and robust power/EMI-aware switching design that survives real-world loads.

@FranciscoSilvi

Hi There! -As you can see in my portfolio, I have developed a good number of products using the ESP32. I always include a voltage monitor and an external Watchdog, such as the TPS3823. Besides monitoring the MCU voltage, it waits for pulses on its WDI pin; if the MCU hangs for any reason, it resets the output to restart the system. -This is not an AI-generated bid like most of those you will see from my colleagues, who say things like "I have carefully reviewed your project" but just clicked the "write my bid" button; I know how frustrating that can be. Therefore, I prefer not to spend too much time manually writing a bid only for it to go to waste. If you're interested in working with me, message me via chat and we can share more details there Regards!!

@hancho6319

I'm Haruna Auwalu, an experienced electrical engineer with strong electronics background and specialized knowledge in designing 24/7-operating systems using microcontrollers like the ESP32. I've worked on numerous embedded systems projects involving safety-critical applications, all of which required fail-safe design and implementation. This makes me ideal for this important traffic light controller. My proficiency in simulation and PCB design tools like KiCad, Proteus, and EasyEDA enables me to ensure proper clearance/creepage in your design, a key requirement for AC mains reliant systems. I have a broad understanding of industrial electronics which makes separation of HV and LV sections, as well as implementing relay-controlled channels with flyback protection a breeze for me. Not only do I possess the technical expertise needed for this project, but I also bring to the table my dedication to accuracy, efficiency, and timely delivery. With my commitment to meeting high safety standards and strict attention to detail during testing, your project is guaranteed reliable operation under any condition. Reach out - let's make this traffic light controller the epitome of safety!

@engrhasan01

Hi, I am an experienced Electronics and PCB Engineer with strong expertise in ESP32-based hardware, industrial control systems, and safety-critical designs. I can design a reliable 24/7 traffic light controller PCB using ESP32, 74HC595 relay control, and proper flyback protection. I will implement robust fail-safe architecture, including a master relay, external hardware watchdog, reset supervisor, and safe power-up behavior. The design will ensure correct OE handling, lamp current-based failure detection, and strict HV/LV isolation with proper creepage and clearance for 220 VAC. I am comfortable delivering a production-ready PCB in EasyEDA, fully DRC-compliant and industrial-grade.

@ElecHamza

Hi, I am an electronics engineer with extensive experience in industrial PCB design and high voltage safety. I will design a robust, 24/7-rated controller featuring hardware-level fail-safes and an external watchdog to ensure the master relay drops immediately upon an ESP32 crash. My design will prioritize proper creepage and clearance for the 220VAC lines while integrating current-based lamp failure detection and shift register control with hardware pull-ups for safe booting. I am proficient in EasyEDA and will provide a professional, production-ready layout that meets all your safety-critical requirements. Best regards

@ElectrixLab

Hello, I can design a robust, 24/7-operating traffic light controller PCB based on ESP32, engineered with proper hardware fail-safe mechanisms for safety-critical operation. I have experience with ESP32 hardware, AC mains control (220VAC), relay-based industrial systems, and watchdog-supervised designs. Your system will be built with a default-safe architecture, including: 3× 74HC595 (SPI) with hardware pull-up on OE (outputs OFF at boot) ULN2803A relay drivers with flyback protection Master safety contactor controlled by hardware logic External watchdog + voltage supervisor (not relying on internal WDT) Brownout-triggered safe shutdown Current-based lamp failure detection (group level via CT) Proper HV/LV PCB isolation with correct creepage/clearance Industrial-grade power input protection (TVS, fuse, reverse polarity) Deliverables: Complete EasyEDA schematic & PCB Industrial-grade BOM Fail-safe logic documentation Design review support I focus on conservative, hardware-enforced safety design suitable for continuous operation.

@saliktechpro

Hey , I just finished reading the job description and I see you are looking for someone experienced in PCB Layout, Electrical Engineering, Circuit Design, Electronics, Prototyping, Signal Processing, Microcontroller and Embedded Systems. 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? 1. I have done more than 250 major projects. 2. I have not received a single bad feedback since the last 5-6 years. 3. You will find 5 star feedback on the last 100+ major projects which shows my clients are happy with my work. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) 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, Salik.

@joaquinc48

✅✅✅ Embedded & Industrial PCB Designer – ESP32 Safety-Critical Systems ✅✅✅ Hi there, I have experience designing industrial-grade PCBs for ESP32-based control systems, including 24/7 relay-driven loads, watchdogs, and fail-safe mechanisms. I specialize in AC/DC separation, safe HV/LV layout, and hardware protections to ensure reliable continuous operation. My approach is to design a PCB with chained 74HC595 relay drivers (OE pulled high at boot), master relay for fail-safe shutdown, external watchdog and reset supervisor, current-sensing for lamp failure detection, and safe power-up sequencing. All layouts will respect 220VAC clearance, creepage, and proper flyback protection. A few questions: Are the traffic lights common-anode or common-cathode? Maximum relay current per channel? Preferred watchdog/reset ICs or open to recommendations? I am ready to start immediately. Best regards

@CaliforniaVibe

Hello, I have thoroughly analyzed your requirements for a reliable and safety-critical ESP32 traffic light controller PCB. With extensive experience in designing fail-safe systems and working with AC mains and industrial electronics, I can ensure continuous operation while adhering to all safety standards. I’m ready to create a robust solution that integrates the necessary watchdog and relay control features. Let’s discuss the details to meet your exact needs. What specific timeline do you envision for the completion of this project?