EMI-Free ESP32 Sensor Interface Board

@amelectronics

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.

@mairajali11

As a highly skilled and experienced Electrical/Electronic Engineer with a specialization in PCB design and almost a decade of experience, I'm well poised to provide you with an exemplary solution for your EMI noise problem. My deep understanding of the issues you're facing stems from numerous projects similar in nature. I have a comprehensive approach to hardware design that delves into every stage of the signal path, ensuring not only functionality but also robustness against interferences. My proficiency in using designing tools such as Eagle, Altium, KiCAD, and EasyEDA will enable me to deliver all the schematics, PCB layouts, and bill of materials with quick turnaround time, but without compromising on quality or completeness. You mentioned the importance of compactness and compatibility with 24V sensor supply and 3.3V logic; I'm well versed in managing such challenges efficiently. To complement my skill-set even further I'm also well acquainted with programming languages like Python, C/C++, Matlab/SIMULINK - all of which can be put to effective use during the testing phase. By choosing me, you are recruiting a professional who is truly dedicated to providing exactly what you need; quality designs transformed into tangible documents/boards that are readily producible at an optimal cost - all aimed toward bringing your ideas to fruition. Let's get started on solving your EMI problem today!

@Amidst

Hey there! I’m Alok, A PCB, Circuit and Mechanical designer with a passion for turning ideas into rock-solid, high-performance circuit boards. even expert on Python, C, C++ With nearly a decade of experience, I’ve tackled everything from compact consumer gadgets to complex industrial systems—always with a focus on precision, efficiency, and reliability. # Schematic & Layout Design – Clean, optimized, and manufacturable. # Component Selection & Library Management – No surprises, just the right parts for the job. # Reverse Engineering – PCB cloning, replication, and improvements. # Gerber, BOM & CPL Generation – Ready for seamless production. # DFM & DFA Expertise – Because great design means smooth manufacturing. # Multi-Layer, Flex, & High-Density PCB Design – Whatever the project needs. If you need a PCB and Code that’s efficient, reliable, and built for real-world performance, let’s chat. I’d love to help bring your project to life!

@elect2eng

please provide me more information such as distance from sensor to esp32. How did you interface the sensor output to esp32 since it is pnp at 24 v, so the output must be 24v dc? I can give your solution based on optical isolation. .........................................

@shivkantverma

Hi, Greetings..! I am interested in working on your project. Please share the design details and project requirements for further discussion. I look forward to working with you. Thank you, Shivkant

@shadabkhan92

As a passionate engineer who thrives on creating solutions that fuse hardware, sensors, and AI, I am confident that I possess the skills necessary to effectively tackle the challenges of your project. With my extensive knowledge in Electrical Engineering, Electronics, and Embedded Systems combined with years of experience in PCB Design and Layout, I can create a bespoke solution tailored to your specific needs. My expertise in handling complex systems like yours is well-demonstrated by my work with LLM integrations and RAG pipelines. These experiences have equipped me with the ability to handle noise reduction, signal quality enhancement, and filtering strategies at every inch of the pathway. In addition to this, my fluency in multiple programming languages makes me an adept fit for addressing any computational requirements that might arise from integrating your ESP32 microcontroller into your workflow effectively.

@abdurRafiqM

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 for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@ahmedy607

Hi, I’ve worked on several ESP32 industrial-interface and noisy-environment PCB designs involving 24V sensors, relays, motors, filtering, and protection circuitry. I can design a complete signal-conditioning stage for your PNP sensor including input protection, filtering, level shifting to 3.3V, grounding strategy, and EMI suppression to ensure a stable ESP32 signal even in heavy electrical noise environments. Deliverables will include schematic, PCB layout, Gerbers, drill files, BOM with available parts, and a simple validation/test procedure. Best regards, Ahmed

@nehasingh17

Hi, We at HardFault can help design a complete hardware solution to deliver a stable, noise-free signal from your PNP sensor to the ESP32 in a high-EMI press machine environment. We have experience with industrial signal conditioning and noisy machine setups involving motors, relays, and switching interference. We will provide: • Complete schematic with values and reference designators • Compact PCB design with Gerber + drill files • BOM with readily available parts • Test procedure to verify a clean signal at the ESP32 The design will include proper protection, filtering, grounding strategy, 24V-to-3.3V interfacing, and if needed, shielding, ferrites, or isolation to ensure a reliable signal. A couple of quick questions before starting: • What is the distance between the sensor and ESP32 board? • What is the sensor output range/type exactly? • Does the noise happen continuously or mainly when motors/relays switch? Looking forward to seeing the video and understanding the setup better.

@ElecHamza

Hi, I can design a rugged, 24 V-tolerant conditioning board that completely isolates and filters your PNP sensor signal for the ESP32. I will implement optical isolation to break the ground loop, a hardware RC low-pass filter to kill high-frequency EMI, and TVS diodes for transient protection against inductive spikes from the motors and relays. You will receive a complete, production-ready package including the schematic, compact PCB layout files (Gerber and drill), a fully component-matched BOM with active manufacturer part numbers, and a step-by-step validation procedure. I am ready to start on this hardware solution immediately to ensure a rock-solid 3.3 V edge at your microcontroller pin. Best regards,

@ThynkLoop

Hi, I can help you design the complete EMI-resistant sensor interface solution for your press machine environment, ensuring a clean and stable signal path from the 24V PNP sensor to the ESP32 GPIO. I have experience with industrial electronics, EMI/noise mitigation, analog signal conditioning, ESP32 interfacing, protection circuits, grounding strategies, and PCB layout optimization for electrically noisy environments. I can deliver a compact and fabrication-ready hardware solution focused on signal integrity and reliable machine-side operation. > Proposed Approach: Signal Conditioning & Protection * 24V-tolerant sensor input stage * Over-voltage and transient protection * TVS/filter/protection component integration EMI Noise Reduction * RC/LC filtering design * Ferrite bead and grounding optimization * Shielded signal-path recommendations * Optional opto-isolation if required ESP32 Interface Optimization * Stable 3.3V logic-level conversion * Clean signal-edge generation for GPIO input * PCB routing focused on noise immunity Validation & Documentation * Compact PCB layout for fabrication * Test procedure for waveform verification * BOM with currently available components > Deliverables: * Complete schematic with values/reference designators * PCB layout with Gerbers and drill files * BOM with purchasable part numbers * Signal validation/test procedure * Documentation and design notes

@chetanb382

Hello, I have experience with ESP32-based industrial interfaces, noisy sensor environments, relay/motor EMI handling, signal conditioning, and PCB design for embedded systems. I understand the challenge of maintaining a clean and reliable sensor signal in electrically noisy industrial environments. My proposed approach: • Analyze the full signal path from the 24V PNP sensor to the ESP32 GPIO • Design proper surge and EMI protection stages • Implement filtering, grounding, and isolation strategies for stable operation • Add suitable protection/filtering components such as TVS diodes, RC filters, ferrite beads, optocouplers, or Schmitt-trigger stages where required • Ensure reliable 3.3V ESP32-compatible output with clean signal edges Deliverables: • Complete schematic with component values and reference designators • Compact PCB layout ready for fabrication • Gerber + drill files • BOM with currently available parts • Brief testing and validation procedure Timeline: 5 Days Budget: ₹8,500 INR Before starting, please confirm: 1. Whether the ESP32 is using the signal as ADC analog input or digital trigger input 2. Approximate cable length between sensor and controller 3. Type of press machine motors/contactors nearby 4. Preferred PCB size constraints if any I’m ready to start immediately and can help develop a robust industrial-grade solution.

@gustavobas

Hi, I am an electronic engineer with experience in hardware design. I've worked on sensors for agricultural harvesters.

@radhikab348

Hi there, I understand your requirements and can provide you with a complete, production-ready circuit that provides signal conditioning for the PNP sensor you wish to use in a noisy EMI environment. The following are deliverables from my side: A complete schematic with reference designators and values EMI filtering stage, consisting of ferrite beads, RC low-pass filter and shielded cable recommendations Use of optical isolation devices (PC817 or equivalent) to provide a clean, safe 24V to 3.3V signal to be read by the ESP32 Over-voltage and reverse-polarity protection stage Proper grounding strategy for the purpose of rejecting common-mode noise An overall compact printed circuit board (PCB) layout, with Gerber and drill files available for fabrication A complete Bill of Materials (BOM) with actual part numbers that can be purchased simple test procedure that can be performed to confirm that a clean signal is present at the ESP32 pin The design will be 24V tolerant on the sensor side, but completely compatible with a 3.3V ESP32 output. I have many years of experience designing signal conditioning and EMI filtering circuits for industrial applications with both motors and relays producing electrical noise. I can start the project as soon as I receive the video and any datsheet that you may have for the sensor. Best regards.