ESP32 4-Relay PCB Design

@Adeel2k14

Hello, I am an electrical engineer with over 7 years of experience in PCB design and embedded systems. I have designed ESP32-based and high-voltage relay boards with AC-to-DC power supplies, proper creepage/clearance, surge protection, and LED indicators. I can deliver a compact, square 4-channel relay PCB ready for Indian manufacturing standards, including schematic, layered PCB layout, Gerbers, pick-and-place, optimized BOM, and compliance notes. I follow DFM/DFT best practices to ensure production readiness. I can also share examples of similar boards I have shipped and support one revision after your review.

@FranciscoSilvi

Hi There! As you can see in my portfolio by visiting my profile, I have designed several PCBs featuring the ESP32 and relay outputs; I believe I can handle your project very easily

@hancho6319

As an Experienced Embedded Systems Engineer, I am well-versed with the design and development of PCBs in compliance with unique project constraints. My skill set includes PCB design using EDA tools such as KiCad and Proteus and it's a delight to hear that these tools align perfectly with your preference too. Having had extensive exposure to circuit design, sensor integration, and hardware debugging, I can assure you of a seamless integration of all core requirements of this project. My background in Electrical & Electronics Engineering solidifies my approach towards power principles, safety margins which would be most suited for Indian manufacturing standards. Additionally, my understanding of digital systems will allow me to ensure compact routing within enclosure alongside introducing surge protection on the mains side. Notably, I have already created a robust BOM system that incorporates local part numbers and alternate choices to guarantee optimization within any locale that an ESP32 4-relay module may head off to.

@ahmedy607

Hello, You can check my portfolio – you’ll find several ESP32-based designs there, including relay controllers and mains-powered boards designed with safety spacing, surge protection, and Indian manufacturing in mind. I’ve handled everything from low-cost IoT nodes to high-voltage isolation layouts that have gone into production.' I’ve gone through your requirements for the “Urban Proto” 4-channel ESP32 relay module. This is exactly the kind of project I specialize in – compact, power-conscious, and safety-critical embedded boards. Regarding your project: ESP32 + 4 Relays + Onboard AC/DC Supply – I’ve designed similar systems before. I can recommend cost-effective electromechanical or SSR relays based on your load and switching frequency. Square board, compact layout – fully understood. Space optimization is critical, and so is maintaining proper creepage/clearance for mains isolation (I follow IPC-2221 and local safety norms). Timeline: I can deliver the first version for your review in 7–10 days, with one revision round included. If my approach aligns with what you’re looking for, I’m ready to start. We can hop on a quick call to clarify any details upfront. Looking forward to building this with you. Best regards, Ahmed

@athulbhat

I will design a production-ready, square-format PCB for your 4-channel ESP32 relay module, optimized for the Indian market's safety and sourcing requirements. Technical Scope Safety-First Layout: 3.5mm creepage with milled isolation slots between AC and DC sections to meet IS 13252 standards. Power Stage: Integrated HLK-PM01 (5V) supply with MOV (14D471K) and fuse protection against Indian grid surges. Control: ESP32-WROOM core with optoisolated relay drivers and tactile manual-override buttons. Form Factor: Compact square geometry (targeted 75mm x 75mm) with 2oz copper for thermal stability. Deliverables KiCad 8.0 Source Files: Fully annotated schematic and 2-layer PCB layout. Manufacturing Pack: Gerbers, NC Drill, and Pick-and-Place files (JLCPCB/LionCircuits ready). Localized BOM: Excel sheet with local alternates (Sugar Cube relays, local terminals) to minimize import costs. Documentation: Fabrication drawing and a 3D STEP model for enclosure fitting. Timeline & Terms Draft 1: Schematic & 3D placement review within 3 days. Final Delivery: Completed layout and Gerbers 2 days after your feedback. Revision: Includes one round of layout adjustments.

@anasfreelance08

Drawing upon my extensive experience in Embedded Systems and the expertise of my Full-Stack Development Team, I am confident we can deliver on the requirements of your ESP32 4-Relay PCB Design project. Our skills in hardware design, firmware development, and a deep understanding of safety regulations mean that not only can we create a compact, high-performance PCB layout with clearances optimized for high-voltage safety standards but ensure it's production-ready for Indian manufacturing. In previous projects, we have applied our thorough knowledge of electrmechanical and solid-state system components to realize reliable PCB designs while keeping BOM costs low for local sourcing. We also understand the importance of compliance documentation especially in reference to maximum safety distances and fusing and this will be included with your design. You're looking for a team that can ship ESP32 or high-voltage relay boards and I'm happy to share that we've already worked on similar projects; one of our notable achievements includes the successful delivery of a relay module integrated with ESP32. By choosing my team, you're partnering with professionals who prioritize user experience, data security, and performance optimization. I'm thrilled about the prospect of building a safe, affordable module for you that can roll straight into production. Let's discuss further details and start working on bringing your innovative Urban Proto module to life!

@MROMUR

I’m an Electrical & Electronics Engineer with hands-on experience designing production-ready ESP32 boards and high-voltage relay PCBs. I have previously shipped boards that integrate AC-DC power supplies, relay outputs, surge protection, and clear HV/LV isolation suitable for real manufacturing. For your Urban Proto 4-channel relay module, I’ll deliver a compact square PCB with properly calculated creepage/clearance, mains-side protection (MOV, fuse, TVS where needed), and a cost-optimized BOM using components available in India. I can recommend electromechanical or SSR relays based on cost, lifetime, and enclosure constraints. You’ll receive a clean schematic, optimized 2-layer or 4-layer PCB, Gerbers, pick-and-place, fab drawings, and compliance notes explaining safety margins and fusing. One full revision after review is included. I can also share examples of previous ESP32 and relay-based designs on request. Let’s build a safe, reliable module that’s truly ready for production.

@MohamedHamza1123

Hi there! I am an experienced electronics engineer specializing in ESP32-based hardware design and power electronics. I can design a compact, production-ready 4-channel relay PCB that meets all your safety and space requirements. ​How I will deliver this project: ​Safety First: I will ensure strict compliance with high-voltage safety margins (clearance/creepage) and integrate robust surge protection. ​Compact Design: I will optimize the PCB layout to fit your tight square enclosure while including the onboard AC-to-DC supply. ​Manufacturing Ready: You will receive full Gerber files, a localized BOM for cost-effective sourcing, and fabrication drawings. ​I have extensive experience creating professional PCBs and embedded systems, including recent award-winning IoT projects. I am ready to start on the 'Urban Proto' immediately!

@ostronik

Hi Greetings from OSTronik India! We are a technology-driven company specializing in Power Electronics and Embedded System Design integrated with Artificial Intelligence (AI), delivering reliable, industrial-grade Electronic Solutions—from concept to mass production, all under one roof. Our in-house capabilities include R&D, Firmware Development (C & Python Programming), Hardware Design, Prototyping, and Scalable Mass Production with a focus on quality and cost efficiency. Core Expertise: • Microcontroller : PIC, STM32, ESP Family, AVR, Nuvoton, XBee. • Microprocessors: Raspberry Pi • Development Tools: MPLAB X IDE, Keil, STM32CubeIDE, Arduino IDE, Atmel Studio, VS Code. • Hardware Design: Industrial-grade multilayer PCBs using Altium Designer, KiCad, with efficient power design, isolation handling, and EMI/EMC compliance. • Communication Protocols: UART, SPI, I²C, CAN, Modbus, MQTT, LAN, S-Bus, RS-485, RS-232. • RF Modules: LoRa, nRF Series, XBee, Laird RF Modules. Project Capabilities: Power Monitoring & Energy Management Units, CNC Controllers, BLDC/DC Motor Control, IoT-based Agriculture, Smart Home & Industrial Automation, Inverters, Stabilizers, and Gimbal-based Videography Control Systems. We have already transformed the concept into a successful Electronic solution for multiple clients. To help you better visualise our expertise, we would be glad to share a brief reference video. Let’s schedule a meeting to discuss further. Best Regards, Team OSTronik India

@WujuLife

With the current budget, we can build a prototype using pre-made modules (ESP32 dev board, relay modules, AC-DC module). For a fully integrated, production-ready PCB with high-voltage isolation, a higher budget would be required. Happy to discuss options to scale it up if needed.