Ultra-Slim No-Neutral Smart Switch

@ITECH

As experts in product design and development, and skilled in circuit design, electrical engineering, electronics, microcontroller, and PCB layout, my team at Raja Shahbaz has the optimal skillset for your ultra-slim no-neutral smart switch project. We have an extensive track record in IoT and embedded systems development, including incorporating the ESP32-C3 and overcoming complex design challenges. Our thorough understanding of touch sensitivity and EMC compliance will ensure your smart switch meets rigorous industry standards while maintaining reliable performance. Moreover, our proficiency with BLE, demonstrated through the delivery of low-latency command response mechanisms in previous projects, guarantees your preferences for Bluetooth LE performance will be met unerringly. At Raja Shahbaz, we place a premium on delivering practical solutions that are optimization-oriented—from considering thermal limits to ensuring sleek fits into different wall boxes. Our experience in all stages of product development, from concept to market, will be invaluable in providing you with more than just the deliverables outlined. Choose us for a comprehensive solution meticulously tailored to your specific needs. Let's build your next cutting-edge connected product together!

@macroenergy

With over a decade of industry experience and a skill set tailored to your project, I am confident that I am the right freelancer to design your ultra-slim, no-neutral smart switch. My expertise in digital motor control and power electronics perfectly aligns with your need for an efficient AC-DC buck design and low-latency Bluetooth LE control. I have successfully developed similar projects where space constraints demanded innovative solutions, which would ensure your light switch comfortably fits both EU and US wall boxes. Moreover, my deep understanding of analog design and electronic components will greatly help in maintaining EMC, thermal limits, and touch sensitivity on one ultra-slim board—a challenge that I wholeheartedly accept. Additionally, my proficiency in PCB design using industry-standard tools like Altium and Easyeda ensures meticulous results so that you can expect a clean schematic, production-ready PCB layout (Gerber, drill, pick-and-place), alongside a well-documented BOM, and minimal test firmware showcasing BLE command latency and radar wake-up response. Lastly, as a dedicated freelance electrical engineer with an unmatched ability in circuit design and proficiency in embedded systems such as ESP32-C3 module and MATLAB simulations for thorough hardware vetting – I can guarantee that you will be absolutely satisfied with the results.

@markoa7

Hello, I’ve reviewed your Ultra-Slim No-Neutral Smart Switch concept and it’s clear you want a compact ESP32-C3-based solution that runs off a leakage-current buck, with silent switching and a capacitive front-end. I’d approach this with a dual-stage power rail that survives very light loads, a protection-aware layout for EMI, and a tightly integrated touch-capacitive bezel paired with a radar wake-up sensor. The PCB would be ultra-slim, compatible with EU/US boxes, and designed around a robust HLK-PM01 supply, MOC3041 gate drive, and a TRIAC like BTA16, all confined inside a PC-V0 enclosure. What is the target date for the first firmware drop and do you have preferred BLE write-then-ack protocol timings to meet sub-50 ms latency for the radar wake-up path? Best regards, Marko Aleksic

@engrusmanfaiz

I am an embedded hardware designer experienced in ultra-compact mains-powered IoT products, including no-neutral smart switches and ESP32-based BLE systems. The design will center on the ESP32-C3 with optimized BLE layout (controlled ground reference, antenna keep-out, and low-noise power domain separation). For the offline supply, I will implement a proven AC-DC stage using Hi-Link HLK-PM01 (or equivalent compact module) with a properly dimensioned leakage-current and bypass-capacitor network to sustain MCU stability under light-load conditions. Switching will use a zero-cross opto driver such as MOC3041 controlling a BTA16-class TRIAC, ensuring silent, fast switching without mechanical relays and compliant thermal margins. The radar section will integrate the HLK-LD2410 with EMI isolation from the mains domain and coordinated interrupt handling alongside a multi-point capacitive touch controller. I will deliver a slim, 2-layer high-voltage–segregated PCB suitable for EU and US wall boxes, with full Gerbers, drill, PnP, and a traceable BOM (LCSC/Mouser codes). Minimal firmware will demonstrate low-latency BLE command response and deterministic radar-trigger wake-up, validating RF performance and power integrity.

@hayteekeys

Hi,KINDLY READ THROUGH MY PROPOSAL THIS IS WHAT I WILL DO - Design a compact no-neutral smart switch PCB around ESP32-C3: leakage-power stage with cap network + HLK-PM01 buck (3.3V/300mA), TRIAC BTA16 + opto MOC3041 for silent switching, integrated HLK-LD2410 radar, multi-point cap touch (TTP223 or ESP32 native). - Ensure slim fit for EU/US boxes (e.g. 50x50x15 mm), PC-V0 enclosure notes, EMC/thermal compliance. - Deliver schematics/layout (KiCad), Gerbers/drill/pick-place, BOM (LCSC codes), basic BLE firmware (ESP-IDF, low-latency control + radar interrupt). RELEVANT PROJECTS - 2025: No-neutral ESP32-S3 dimmer switch (leakage cap + TRIAC) – radar/touch integrated, JLCPCB 200 units. - 2024: Compact single-fire BLE relay (ESP32-C3 + MOC3041) – stable with 5W min load, field-tested. QUESTIONS - Exact switch load range (min/max W for lights)? - Touch points count & glass thickness? - Radar detection range prefs? - Enclosure supplier or 3D model needed? I’m ESP32 no-neutral vet. Feasible with proven cap dropper + buck for reliable MCU power. It will be Ready in 7–10 days. Please let’s build it

@Adeel2k14

I am an Electrical Engineer with 7+ years of experience in PCB and embedded system design, currently working as an Embedded System Design Engineer in a reputed firm. I have extensive experience designing compact, mixed-signal, and high-speed PCBs. I specialize in schematic and PCB layout and can help create a slim, production-ready ESP32-C3 smart switch board that meets your no-neutral, silent TRIAC switching, radar, and BLE requirements. I can provide schematic, Gerbers, and a complete BOM ready for manufacture, ensuring clean layout and reliable operation

@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.

@KESHAVINFOTECH

Hi There, 1.I need a compact, single-fire line smart light switch designed around t... ==> We understand you need a mobile app for your custom ESP32-C3 smart switch. We have done similar projects before. One app we built had a cool feature where users could create rules, like automatically turning on lights at sunset, making the home feel smarter. We will make a very clean app to control your switch. We got your idea about silent switching and touch features. Inside the app, the control button will feel instant. We will also add a screen so you can set up what different touches on the switch will do. You will also be able to see the radar sensor status from the app. We know the Bluetooth LE part is very important. Our app will connect fast and send commands with almost no delay. We will make the app very light so it works smoothly and provides a great user experience. ## Queries : 1. Could you share the details for the Bluetooth LE GATT profile the firmware will use? This helps us build the apps communication correctly from the start. ## Initial Project Structure : - Splash - Device Scan - Home Dashboard - Switch Control Panel - Switch Settings We use advanced AI tools (Cursor, Claude, ChatGPT) to speed up coding and reduce manual work hours. We pass these time-savings to you, providing a high-quality app at a very competitive price. Waiting for your reply. :-) Regards, Ghanu & Samir. KESHAV INFOTECH

@shykhAbubakar

Hello, I can design a compact no-neutral smart light switch based on the ESP32-C3, integrating silent TRIAC switching, radar sensing, and capacitive touch into an ultra-slim PCB suitable for EU and US wall boxes. The focus will be on leakage-current-powered AC-DC architecture, stable MCU operation under light-load conditions, low-EMI TRIAC control, and strong BLE RF performance. All work will follow IEC residential safety practices and DFM-ready PCB standards. Following are the deliverables: • Schematic design and PCB layout • Gerber, Pick- and- Place, Drill files for manufacturing • Minimal test firmware • Bill of materials I wanted to ask: • Target mains voltage range (110V, 230V, or universal)? I have 7+ years of experience in projects like: • No-neutral smart switches with TRIAC dimming and leakage-powered supplies • ESP32-based IoT devices with BLE and capacitive touch integration My software expertise includes: • KiCad, Altium Designer, EAGLE Thank you for considering my proposal. I’m available to clarify and discuss details further through a meeting at your ease. Best Regards, Abubakar

@electronicsdone

Best ESP32-C3 No-Neutral Smart Switch 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 smart switch that operates reliably without a neutral wire. I bring 11+ years of experience in ESP32-based designs, no-neutral AC power architectures, TRIAC switching, and ultra-slim residential electronics. I’ve worked on leakage-powered smart switches, touch interfaces, and BLE-enabled devices, ensuring silent operation, stable power delivery, and EMC-aware layouts suitable for real-world installations. ✅ How I’ll Help You Succeed 1. Design a safe, reliable no-neutral power stage using a proven AC-DC module and bypass network to maintain MCU stability under light loads. 2. Implement silent TRIAC switching with opto-isolation for fast, relay-free operation. 3. Integrate the ESP32-C3 with optimized BLE performance in a space-constrained enclosure. 4. Deliver an ultra-slim PCB layout compatible with both EU and US wall boxes, respecting thermal and EMC constraints. ✅ Before I start, one quick question: Do you want the initial design optimized strictly for resistive lighting loads, or should I account for mixed loads (LED drivers, dimmable bulbs) from the first revision? If you share that, we can align quickly and move forward. Best regards, Prat PCB Must Innovations

@SinzoTechLab

Hello, Thank you for the detailed description. This is a complex mains-powered, no-neutral smart switch requiring careful power architecture, EMC control, thermal validation, and RF-aware layout. A leakage-powered design using a triac stage (BTA16 + MOC3041) alongside an ESP32-C3 and 24 GHz radar demands: • Proper dropper/buck topology validation under light-load conditions • Stable MCU hold-up network sizing • dv/dt immunity and snubber optimization • Creepage/clearance compliance for 230 V • RF layout integrity for BLE performance • Thermal analysis in confined wall-box form factor Estimated effort: 80–100 engineering hours Professional rate: 25 €/h Estimated project range: 2,600–4,500 € At 4 €/h, it would not be possible to deliver a safe, compliant, and production-ready design. If your objective is a serious residential product (even MVP stage), I can propose a phased approach: Phase 1 – Power architecture validation + schematic Phase 2 – PCB layout ultra-slim + RF optimization Phase 3 – Minimal BLE + radar validation firmware Let me know if you would like to proceed on a realistic engineering basis. Best regards, Hassan

@ahmedy607

Hello, Please check my portfolio — I’ve designed compact ESP32-based AC switches, including no-neutral solutions. I can develop an ultra-slim PCB around **ESP32-C3**, using a proven AC-DC module like **HLK-PM01**, with a properly engineered leakage-powered supply and hold-up network for light-load stability. Silent TRIAC switching (e.g., **BTA16** + **MOC3041**) will ensure fast, relay-free operation. Radar integration via **HLK-LD2410**, plus multi-touch capacitive interface, all within an EMC-aware, ultra-slim layout fitting EU & US wall boxes. Deliverables include schematic, production-ready PCB, full BOM, and minimal BLE test firmware. Best regards, Ahmed

@proggon

Hi there, It sounds like you’re looking to create an innovative, ultra-slim smart light switch that caters specifically to residential users without a neutral wire. I understand the technical challenges you’re facing in terms of optimizing for leakage current while ensuring fast and silent switching. This is indeed an exciting project that combines stylish design with top-notch performance. I have extensive experience with ESP32-C3 designs, and I can certainly develop a solution that meets your needs. I will design a compact PCB that incorporates the Hi-Link HLK-PM01 module and a reliable bypass-capacitor network, ensuring the MCU maintains functionality even under minimal load conditions. I’ll also ensure that your design includes a space-efficient layout to fit both EU and US wall boxes, featuring the HLK-LD2410 radar sensor and a capacitive touch interface that seamlessly recognizes multiple touch points on the glass front. My approach will prioritize BLE performance and provide you with a thorough BOM and production-ready files, giving you confidence in both reliability and manufacturability. Could you share any specific performance metrics you have in mind for the BLE control? https://www.freelancer.com/u/proggon Best regards, Wahaj Barlas.

@MADAlphaDesigns

THIS IS NOT THE AUTO BID, PLEASE REVIEW IT IN DETAIL Hi, I’ve reviewed your project and understand you’re looking for a compact smart light switch designed around the ESP32-C3. My experience with no-neutral designs, particularly using AC-DC buck converters like the Hi-Link HLK-PM01, makes me confident in delivering a solution that meets your stringent requirements. I specialize in creating ultra-slim PCBs that accommodate both EU and US wall boxes while ensuring silent switching with a setup involving the MOC3041. I'll provide a complete schematic, production-ready PCB layout, and a clean BOM, along with minimal test firmware to verify Bluetooth LE performance and radar response. What specific constraints or preferences do you have regarding the touch interface? What specific constraints or preferences do you have regarding the touch interface? Thanks, Ibad

@patrickjamesi

Hi, I'm an electrical engineer who thrives on developing robust, innovative solutions for electronic product development. My core specialties in PCB design and development, firmware programming, and RF design and analysis perfectly align with your Ultra-Slim No-Neutral Smart Switch project needs. Over the course of my career, I've consistently demonstrated competence in creating efficient power supply circuits, multilayer board designs, implementing wireless technologies, and even squeezing complex designs into tight spaces. I'm confident I can successfully manage the multiple challenges this project presents such as the need to ride on leakage current and using a compact AC-DC buck. On top of my design skills, efficient management of EMC, thermal limits, touch sensitivity, and meeting size requirements are values dear to me. Additionally, I've mastered communication protocols like UART, SPI which would be handy for low-latency BLE control you desire. I believe we will make a great team as your project pushes the envelope of innovation—a zone I excel at. I offer my commitment to a cost-effective process without compromising on quality or deadlines. With me on board, you can expect an exceptional final turn out that blends performance with simplicity. Let's chat more about your vision.

@ElectronicsMust

ULTRA-SLIM SMART SWITCH DESIGN EXPERT NEEDED Dear Client, You’re looking to develop an ultra-slim, no-neutral smart light switch based on the ESP32-C3, designed for residential installation in EU/US wall boxes—with silent TRIAC switching, reliable BLE control, integrated radar sensing, and strict space, thermal, and EMC constraints. This aligns well with my background in compact ESP32-based designs, no-neutral AC power architectures, and mixed-signal PCB layout under tight mechanical limits. Here’s how I would approach your project: ✅ Design a proven no-neutral power stage using a compact AC-DC module (e.g., HLK-PM01) and carefully sized bypass-capacitor network to maintain MCU stability under light-load conditions. ✅ Implement fast, silent solid-state switching using an opto-isolated TRIAC driver (MOC3041-class) and power TRIAC (BTA16 or equivalent), with proper EMI suppression and thermal design. I have 11+ years of experience designing compact ESP32 systems, no-neutral smart switches, and ultra-slim residential electronics that balance power integrity, RF performance, and safety constraints. Question: Do you have a target maximum PCB thickness and enclosure depth we should design to from day one? I’d be happy to review your enclosure constraints and propose a clean, manufacturable solution that fits both electrically and mechanically. Best regards, Avi Gupta

@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

@franciscow0

Hi, This is exactly the kind of tight, low-power ESP32-C3 design I enjoy working on. I can create a compact, production-ready PCB that squeezes the HLK-PM01 power stage, TRIAC/optocoupler, capacitive touch, and microwave radar into a slim board that fits standard EU and US wall boxes. I’ll make sure BLE is reliable, radar interrupts wake the MCU correctly, and the board stays stable even with tiny loads. You’ll get full schematics, layout, BOM, and a minimal firmware demo for BLE + radar.

@wesleyn13

Hi there, This is a fun challenge. I can design a single-fire smart switch on the ESP32-C3 that works without a neutral, uses a small HLK-PM01, and combines radar and capacitive touch sensing in a tiny PCB. TRIAC switching will be silent and safe, BLE latency minimized, and the layout will be thin enough for standard wall boxes. I’ll provide schematic, production-ready PCB files, a clear BOM, and minimal firmware to prove radar and BLE operation.