Ultra-Slim No-Neutral Smart Switch -- 2

@mairajali11

As an experienced Electrical/Electronics Engineer and Professional PCB Designer, I have been adept at designing compact circuit boards while maintaining optimal functionality over my 8-year-long career. Your project aligns perfectly with my skillset, particularly in my prowess of squeezing ESP32-C3 designs into no-neutral form factors. Notably, I have been highly effective in ensuring that EMC, thermal limits, and touch sensitivity couldn't compromise each other. Utilizing my expertise in Eagle, Altium, KiCAD, and EasyEDA, I can pivot your project towards a successful completion. I understand the importance of short latency BLE control and radar wake-up response for your design and assure you of meeting these requirements accurately. With a consistent record of delivering high-quality work within stated budgets and deadlines, my dedication to excellent PCB designs backed by in-depth engineering knowledge makes me confident of providing the necessary deliverables with utmost precision and detail. Beyond just ticking off the checkboxes for your project requirements, my goal has always been to turn clients' ideas into reality. My availability 24/7 further ensures constant communication and a project update cycle that aligns better with your convenience. Thank you for your time, and I look forward to discussing the details further with you!

@kingch91

Hi, I have read and understood your requirements. I have experience of more than 7 years as an embedded software engineer and product lead, I can provide you with end-to-end solution for this project from your idea to its actualization and development; or anywhere in between. I have extensive hands-on experience with the following technologies, platforms and programming languages and PCB designs: PCB Platforms: Altium Designer, KiCAD, EagleCAD and few others ARM: NRF52, STM32, ESP8266, ESP32 Other boards: Arduino, Particle Wireless Protocols: BLE, 802.15.4 (OpenThread & Zigbee), WiFi, GSM SIM800 Other protocols: HTTP Development IDEs: Keil, Arduino, Visual Studio Programming Languages: C, C++, python You can see our portfolio/ reviews and feedback regarding automation projects. Please send a message in chat for further discussion. Thank you.

@majeed219

Hi there, You need a reliable, no-neutral ESP32-C3 smart switch that passes strict EMC limits; I specialize in ultra-slim AC-DC IoT architectures designed for tight spaces. --Why me?-- I engineer high-density, thermally optimized PCBs, specifically tailored for restricted EU and US wall boxes. --My method-- I will strictly isolate the HLK-PM01 leakage circuit and MOC3041 from the radar sensor to guarantee silent TRIAC switching and flawless capacitive touch. --Portfolio-- * Tuya Smart Node — delivered a compact, multi-point touch interface behind glass. * Smart Vital Ring — engineered a micro-scale, high-precision flexible PCB. --Facilities & hardware-- My lab is equipped with isolated oscilloscopes and dynamic loads to accurately validate sub-milliamp AC leakage and precise gate triggering. --Availability-- I am ready to start the schematic layout immediately and respond to messages within two hours. --Post-project support-- Two months of dedicated hardware refinement to perfectly tune your capacitive thresholds and radar wake-up interrupts. --Documentation-- Full production Gerbers, an LCSC-optimized BoM, and native ESP-IDF test firmware are included at hand-off. Regards, Majeed

@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.

@debosx

Hello! I'm a highly skilled PCB Designer with over 9 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

@shykhAbubakar

Hello, I can design a compact no-neutral smart light switch around the ESP32-C3 with silent TRIAC switching and integrated radar sensing. The focus will be on leakage-current power stability, ultra-slim mains layout with safe creepage/clearance, and reliable low-latency BLE performance inside a PC-V0 enclosure. All work will follow IEC 60669 residential switch guidance, and IPC-2221 PCB safety standards. Following are the deliverables: • Schematic design and PCB layout • Gerber, Pick-and Place, Drill files for manufacturing • Firmware development • Bill of materials I wanted to ask: • Target mains voltage (120V / 230V / universal)? • Maximum allowable PCB thickness and depth? I have 7+ years of experience in projects like: • ESP32 BLE IoT devices with capacitive touch • Mixed HV + RF layouts with EMC-conscious design My software expertise includes: • Altium Designer, KiCad, EAGLE • ESP-IDF Thank you for considering my proposal. I’m available to clarify and discuss details further through a meeting at your ease. Best Regards, Abubakar

@azraazeen9

Having arrived at your job description, I can't help but be enthusiastic about it matching my electrical engineering skills and experience with PCB Layout. With extensive proficiency in schematic design and a keen eye for converting concepts into reliable and efficient solutions, I've successfully executed numerous no-neutral smart home projects similar to what you're seeking. My forte in leveraging the ESP32-C3 architecture, power management with Hi-Link HLK-PM01, AC-DC buck, and capacitor networks attests that your project will be in capable hands. As you've emphasized on the need for compactness without compromising functionalities and waveform switching performance speed, my hand-on experience with non-mechanical relays like BTA16 driven through an opto-isolated MOC3041 gate would come invaluable. The extra cherry on top for your project is my fluency in Bluetooth LE; you can count on its low-latency implementations perfectly synchronized with radar wake-up responses. My history of delivering comprehensive documentations with complete Gerber files, BOMs with LCSC or Mouser order codes and successful test firmware shows my commitment to quality deliverables. Let's devote our efforts to making this highly-functional, ultra-slim Smart Switch a reality together. I look forward to further discussing your needs in detail.

@electronicsdone

Best ESP32-C3 Smart Switch Hardware Design Expert ⭐⭐⭐⭐⭐ Hi, Thank you for posting your project, “Ultra-Slim No-Neutral Smart Switch.” I’ve reviewed your requirements and can help you design a compact, production-ready ESP32-C3 smart switch that operates reliably without a neutral wire while meeting residential safety, EMC, and thermal constraints. I bring 11+ years of experience in embedded hardware and power electronics, including no-neutral AC designs, ESP32-based smart devices, TRIAC switching, opto-isolation, touch interfaces, and ultra-compact PCB layouts for EU and US wall boxes. ✅ How I’ll Help You Succeed 1. Design a proven no-neutral power stage using HLK-PM01 (or equivalent) with an optimized bypass-capacitor network to keep the ESP32-C3 stable under light loads. 2. Implement silent TRIAC switching (BTA16 or equivalent) with opto-isolated MOC3041 gate drive, ensuring fast response and long-term reliability. 3. Create an ultra-slim PCB layout that fits both EU and US wall boxes while respecting creepage, clearance, EMC, and thermal limits. ✅ Before I start, one quick question: Do you already have target enclosure dimensions (PC-V0 housing thickness and wall-box depth) finalized, or should I assume a maximum PCB thickness and propose the safest stack-up for both EU and US installations? If you share that, we can align quickly and move forward. Best regards, Prat PCB Must Innovations

@SinzoTechLab

Embedded systems engineer with experience in compact mains-powered ESP32 designs, triac switching, capacitive touch and radar integration. I have developed AC front-ends and ultra-slim IoT boards with strong EMC and thermal constraints. Important point: HLK-PM01 requires Line + Neutral. In a true no-neutral topology (line + load only), the power stage must use a dedicated capacitive dropper or optimized no-neutral AC supply with controlled leakage current and sufficient energy storage to keep the ESP32-C3 stable under light loads. Brownout immunity and thermal limits will be carefully managed. Proposed architecture: • No-neutral AC front-end with rectification, regulation and hold-up reservoir • BTA16 (or equivalent) TRIAC driven by MOC3041 (zero-cross) • Snubber network for EMC stability • HLK-LD2410 radar isolated from mains domain • Multi-touch capacitive controller via I2C • Slim 4-layer PCB with solid ground plane • RF keep-out under ESP32-C3 antenna • Proper creepage/clearance and ESD strategy Deliverables: • Complete schematic • Production-ready PCB (Gerber, drill, CPL) • BOM with LCSC/Mouser codes • Minimal firmware proving BLE low latency + radar interrupt Timeline: ~4–5 weeks. Budget: to be aligned realistically with scope and safety requirements.

@ahmedy607

Hello, Please check my portfolio — I have designed several compact **ESP32-based smart control boards and AC switching circuits**, including space-constrained embedded designs. I can develop an ultra-slim PCB based on **ESP32-C3**, using a proven AC-DC module like **HLK-PM01** with a properly engineered leakage-powered supply and hold-up capacitor network for stable operation in no-neutral installations. For silent switching, the design will use a TRIAC stage such as **BTA16** driven by an opto-isolated zero-cross driver **MOC3041**. The board will also integrate the **HLK-LD2410** sensor and a capacitive touch interface while maintaining good EMC, thermal performance, and BLE reliability. Deliverables will include the **complete schematic, production-ready PCB layout, full BOM (LCSC/Mouser), and minimal BLE test firmware** demonstrating radar interrupt and low-latency control. Best regards, Ahmed

@sivakumar676

─── ⚡⭐⋆☆⋆⭐⚡ ─── Hi, Client. I’ve packed ESP32 C3 smart switch boards into EU and US wall boxes, with no neutral power stages, silent triac control, and solid BLE range. Stack: Altium or KiCad for ultra slim PCB, ESP IDF firmware, and safety first layout rules for mains, isolation, creepage, EMC, and thermal. please check previous project: https://www.freelancer.com/projects/embedded-systems/OTA-Dual-Bank-STM-Update/proposals I’ve built leakage powered switch designs using Hi-Link HLK-PM01 class modules, MOC3041 gated BTA16 class triacs, plus bypass networks tuned to keep the MCU alive on tiny loads. Your goal is production ready files and a minimal demo firmware that proves low latency BLE control plus reliable HLK-LD2410 radar interrupts behind the glass touch front. So, I'll: Lock the PC V0 keepouts and wall box fit, then route RF and mains zones for isolation and BLE performance. Deliver Gerbers drill pick and place and BOM with Mouser or LCSC codes, plus ESP IDF test app measuring BLE latency and radar wake response. Best, Siva

@ZainAbbas51862

Greetings Dear Hiring Manager I have read the description of your project and I understand everything. I am an expert in ESP32-C3 hardware design and no-neutral power harvesting, with extensive experience in silent TRIAC switching and integrating high-sensitivity microwave radar sensors like the HLK-LD2410. I specialize in ultra-slim PCB layouts that maintain robust BLE signal integrity and stable capacitive touch performance within the thermal constraints of a PC-V0 enclosure, ensuring a reliable 0.8mm-1.0mm board profile for global wall box compatibility. I am waiting on chat to discuss more and I am willing to start it now. Best Regards, Zain Abbas

@hancho6319

Being an Embedded Systems Engineer with vast experience in both Electronics and Microcontroller programming, I understand the complexities of your project at a deep level. My proficiency encompasses circuit design, sensor integration, automation systems, and PCB design which equips me with all the necessary skill-sets to meet your project's requirements. Specifically, I have significant experience with microcontrollers like ESP32 and robust software engineering which includes but not limited to C and relevant languages for powering the ESP32-C3 to fit into no-neutral form-factors effectively. Additionally, my Electrical & Electronics Engineering background gives me an edge in tackling power limitations by riding on leakage current. I keep up-to-date with the latest technologies and design best practices to ensure that I deliver a slim, compact PCB minimizing any EMC and thermal risks while maximizing touch sensitivity- precisely what you need. Over time, I have honed my skills in KiCad, EasyEDA Pro other EDA tools executing impressive designs for manufacturable products. To consolidate my capacity further, I have a sound experience in firmware development for BLE control as well as using microwave radar sensors like HLK-LD2410 which will be an asset in implementing your desired functionalities.

@joaquinc48

✅✅✅ Ultra-Slim ESP32-C3 No-Neutral Smart Switch Designer ✅✅✅ Hi there, I have experience designing compact mains-powered IoT devices using ESP32 variants, triac-based switching (MOC30xx + BTA series), and no-neutral power architectures with capacitive dropper/buck modules and hold-up networks. I’ve handled EMC, creepage/clearance, thermal constraints, and BLE optimization in tight wall-box form factors. My approach is to design a slim multi-layer PCB with reinforced isolation, stable leakage-powered AC-DC stage, optimized TRIAC gate drive, and filtered radar + capacitive touch integration. I’ll ensure proper RF layout for low-latency BLE and deliver Gerbers, BOM (LCSC/Mouser), and minimal BLE + radar test firmware. I am ready to start immediately. Best regards

@guruexpert123

Hi, I can design a compact, no-neutral ESP32-C3 smart switch that fits EU/US wall boxes while maintaining safe isolation, thermal stability, and reliable BLE performance. My approach will be a tightly layered, ultra-slim PCB with careful high-voltage/low-voltage separation, an optimized non-neutral power stage using a proven AC-DC module plus engineered bypass/bleeder network to maintain MCU stability under light loads, and a silent TRIAC switching stage (opto-isolated zero-cross driver + BTA-class TRIAC) tuned for low EMI and fast response. I’ll integrate the HLK-LD2410 radar module with proper RF clearance and shielding strategy, combine it with a multi-point capacitive touch front end, and validate thermal margins and EMC routing before finalizing Gerbers. Deliverables will include a production-ready schematic, fully routed PCB (Gerber, drill, pick-and-place), structured BOM with LCSC/Mouser codes, and minimal firmware proving low-latency BLE control and reliable radar interrupt handling. The design will prioritize safety, compactness, and manufacturability from day one.

@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