3-Phase Motor Auto Switch Design

@tshibsamuel477

Hi there, I carefully reviewed your 3-phase submersible motor auto-switch requirements, including 415 V AC phase monitoring, single-phasing protection, the 30–45 second startup delay, fast fault trip, low-cost MCU architecture, relay output, and compact production-oriented PCB. I am a mechatronics engineer with almost half a decade of experience in embedded electronics, power-supply design, PCB layout, hardware prototyping, and microcontroller-based systems. My background is well suited to the hardware side of this project, particularly the high-voltage sensing, power-supply architecture, protection circuitry, relay interface, component selection, and compact manufacturable PCB design. Because embedded hardware, power electronics, and PCB design are already part of my skillset, I can approach the design efficiently with particular attention to safety, creepage/clearance, noise immunity, reliable phase detection, and cost-effective mass production. Please send me a message so we can discuss the project and start. Best regards, Samuel tshibangu

@kkirandeep582

As a seasoned hardware & firmware design engineer, I’m well-positioned to take on the challenge of your 3-Phase Motor Auto Switch project. Not only do I have extensive experience working with low-cost MCUs like Padauk, Nuvoton N76E003, and Puya/STC that are perfect for your budget, but I'm also adept at transformerless power supply design with capacitive droppers which you're utilizing. I guarantee production-ready deliverables including detailed schematics & layout files, Gerber files, a comprehensive BOM, well-commented code, and complete intellectual property rights transfer. Beyond my technical skills, what sets me apart is my commitment to my client's satisfaction. I always make it a point to communicate proactively ensuring smooth project execution. My attention to detail guarantees a high-quality outcome and my affordable pricing doesn't compromise the premium nature of my work which ensures you'll get the best value for your money.

@sakshis576

As an electronics engineer, experienced in embedded systems and PCB layout design, I understand the gravity of your project and possess the skills necessary for its successful execution. With a deep understanding of hardware and firmware design incorporated with your project's technical specifications, I can build you a low-cost 3-Phase Auto Switch that meets your specific demands, including single phasing protection. Moreover, my expertise in transformerless capacitive dropper power supply aligns with your project requirements of generating 12V for relay and 5V for MCU. My extensive experience with ultra-low-cost MCUs such as Padauk, Nuvoton N76E003, or Puya/STC makes me the ideal candidate for this job as I am familiar with their manufacturing processes to achieve cost efficiency.

@azraazeen9

With over 10 years of experience in Electrical Engineering, I am your go-to expert for your 3-Phase Motor Auto Switch project. Your project scope perfectly aligns with my skills in hardware and firmware design. I have a proven track record of designing cost-effective and efficient embedded systems, which will form the foundation of a reliable and compact motor auto switch that you need. My proficiency in PCB layout design—especially with KiCad and EasyEDA—ensures meticulous attention to detail and maximized space utilization. I have also mastered working with low-cost MCUs, notably Padauk, Nuvoton N76E003, and Puya/STC, all of which are tailored for projects with tight budget constraints like yours. My diverse knowledge base includes transformerless dropper power supplies and single-phase failure detection through optocoupler or resistor networks; factors that are critical for the success of your project.

@hexabitzprojects

Hi, I can develop this **3-phase submersible motor Auto Switch with Single Phasing Protection** from hardware through firmware and production files. I have **16 years of embedded hardware/firmware R&D experience** with STM32, Nuvoton-class MCUs, industrial automation, motor control, relay systems, sensor monitoring and compact custom PCBs. I can handle the complete design: * 415V 3-phase sensing and phase-failure/sequence detection * Transformerless low-cost power supply architecture * Low-cost 8/14-pin MCU selection and Embedded C firmware * 12V relay and 3-status LED control * 30–45 sec startup delay and 2–3 sec single-phase trip logic * Compact 1/2-layer KiCad/EasyEDA PCB * Production-ready Gerbers and NC drill * BOM with MPNs and sourcing information * Commented `.c/.h` source and compiled `.hex` I have previous experience with **industrial motor/pump control, protection systems, relay automation, sensor monitoring and MCU-based controllers**, which is directly relevant to this application. I will pay particular attention to **mains-to-low-voltage isolation, creepage/clearance, surge protection and reliable phase sensing**, since the PCB interfaces directly with 415V AC. All agreed source files and IP can be transferred to the client at completion. Best regards, Subhash Suman Embedded | STM32/MCU | Motor Control | Industrial Automation | PCB Design

@rfandelectronics

As professional RF & Electronics Engineers, we are well-acquainted with tackling unique design challenges while keeping costs at a minimum. Our expertise in Embedded Systems and Microcontrollers will ensure a comprehensive hardware-firmware solution for your 3-Phase Motor Auto Switch, meeting all the necessary specifications. Our abundant experience with single-layer or 2-layer compact PCB design - a specific requirement for your project - is an added advantage that will guarantee cost-effectiveness and manufacturing feasibility. In addition to the technical know-how, we offer a strong research background for the job at hand. As mentioned in our profile, we actively contribute to academic research and have extensive experience in Master’s & PhD Research Support in RF, Microwave & Antenna Engineering. Hence, we understand the importance of detailed documentation - whether it’s about schematic & PCB layout files or the BOM - and can ensure their accuracy to smoothen any future manufacturing or troubleshooting process. Lastly, our devotion to customer satisfaction is unparalleled. We prioritize delivering on time without compromising quality, while also maintaining a friendly and reliable work relationship with our clients. Rest assured that not only would you be benefitting from our technical competency but also from our commitment to providing complete IP rights and transferring source code to you as per your project requirements.

@hamzaePCB

Hi, I reviewed your requirements for the 3-phase submersible motor auto switch. I can handle the hardware design and PCB development in KiCad, with particular attention to the 415V three-phase input, phase-loss/unbalance sensing, MCU/relay interface, PCB isolation and manufacturing constraints. Before finalizing the design, I would first define and verify: - 3-phase sensing and single-phasing detection circuit - Safe separation between 415V sensing and low-voltage MCU sections - 12V relay and 5V MCU power architecture - 30–45 s startup delay and 2–3 s phase-loss trip logic - Relay driver and protection - Compact PCB layout suitable for production - Component selection based on cost and availability Deliverables can include the complete KiCad schematic and PCB source files, Gerbers, BOM with MPNs, and the required firmware source/HEX files. One point I would like to clarify before starting: do you already have a preferred MCU from Padauk/Nuvoton/Puya/STC, or should the MCU be selected based on cost, availability and programming requirements? I’m also open to discussing the transformerless power-supply implementation before finalizing the schematic, since safety, isolation and production requirements are important for a 415V design.

@alfatrade2

The 415V capacitive power supply is the most dangerous part of your spec — it has no galvanic isolation, so no debugging on live mains can be done without an isolation transformer. I've written firmware for microcontrollers with sensors and drive control in C/C++, so I can implement the 30–45 s logic and the 2–3 s shutdown on phase loss. The schematic and PCB need to be reviewed by a certified engineer. Will someone on-site be assembling the prototype for you?

@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) and Mobile Application Development, delivering reliable, industrial-grade electronic and software solutions—from concept to mass production, all under one roof. Our in-house capabilities include R&D, Firmware Development, Hardware Design, Mobile Application(Android & iOS), Prototyping, and Scalable Mass Production, with a strong focus on quality, performance, and cost efficiency. Core Expertise: • Microcontrollers: PIC, STM32, ESP Family, AVR. • Microprocessors: Raspberry Pi • Development Tools: MPLAB X IDE, STM32CubeIDE, Arduino IDE, Atmel Studio, VS Code • Hardware Design: Industrial-grade multilayer PCBs using Altium Designer with optimized power design, isolation handling, and EMI/EMC compliance • Communication Protocols: UART, SPI, I²C, CAN, Modbus, MQTT, LAN, S-Bus, RS-485 Mobile Application Capabilities: • Custom Android & iOS mobile applications for device control, monitoring, and data visualization • Real-time dashboards, cloud connectivity, and secure user authentication • Seamless integration between IoT platforms and mobile apps We have successfully transformed multiple concepts into market-ready electronic and mobile-enabled solutions. We would be glad to share a brief reference video. Let’s schedule a meeting to discuss your requirements in detail. Best Regards, Team OSTronik India

@WaddahJanajreh93

Hello, I’m an embedded hardware and PCB engineer with experience in electrical wiring and motor-control systems. I can design your 3-phase auto-switch, including phase monitoring, the 30–45 second startup delay, single-phasing protection, the 12V relay output, and the three status LEDs. I will select a suitable low-cost MCU and deliver the complete KiCad schematic and PCB source files, production Gerbers, a detailed BOM with manufacturer part numbers and sourcing links, well-commented C source code, and the compiled HEX file. I can also provide a wiring diagram showing how the PCB connects to the external motor starter. All design and source files will be transferred to you. To finalize the connections, please confirm whether a neutral is available and the voltage of the motor starter’s contactor coil.

@waltero37

Hi there, I can design your low-cost, production-ready 3-Phase Submersible Motor Auto Switch with SPP protection. Key Technical Approach: Power & Protection: 12V/5V transformerless capacitive dropper supply with MOV surge protection and optocoupler-isolated phase sensing. MCU & Logic: Low-cost 8-bit MCU running Embedded C for a 30–45s start delay and 2–3s fast trip on phase loss/reversal. Deliverables: KiCad/EasyEDA schematic & PCB files, production Gerber/BOM, C source code (.c, .h), .hex binaries, and 100% IP rights transfer.

@paulpham93

I can design the hardware and firmware for a low-cost MCU-based automatic switch for your 3-phase submersible motor. I’ll map voltage/current requirements, select suitable sensing and power components, create the schematic and PCB, and implement safe start/stop, dry-run and fault handling. My Upwork profile has earned over $300,000 on Upwork with account Paul.P. Best regards, Paul.

@udbheda

Hi there, I am an embedded systems engineer based in Gujarat, India, and the founder of Bhavya Xontech Pvt. Ltd. I specialize in agricultural automation, motor control, and custom hardware design. A 3-Phase Submersible Auto Switch with SPP is a highly standard product in my local agricultural sector, and I am intimately familiar with its architecture, constraints, and mass-manufacturing requirements. Why I am a great fit: AC Mains & Power Electronics: I have designed custom control boards for voltage stabilizers handling wide AC fluctuations, making me highly comfortable with 415V AC handling and relay switching logic. Low-Cost Hardware: I can design a reliable transformerless capacitive dropper power supply and an optocoupler/resistor-based phase sensing network tailored for an ultra-low-cost MCU like the Nuvoton N76E003 to keep your BOM cost minimal. PCB & Firmware: I regularly use EasyEDA/KiCad for compact PCB layouts. I will write clean, well-commented Embedded C firmware for the power-on delay and rapid 2-3 sec trip logic on phase loss. I will provide the complete schematic, Gerbers, BOM, source code (.c, .hex), and transfer 100% IP rights to you as requested. Let's connect via chat to finalize the MCU selection and start immediately. Best regards, Uday Bheda Bhavya Xontech Pvt. Ltd.