Freelance Project: Advanced High-Voltage Control Motherboard for Imaging System (KiCad / Altium / Proteus) We are seeking a highly experienced Computer/Electronics Engineer with a strong background in high-voltage power systems, embedded control, and PCB

@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.

@engrusmanfaiz

Your system’s core challenge is stable multi-rail power and noise-isolated PWM control for high-voltage interfacing—without this, timing accuracy and control reliability will fail. I have strong experience in power electronics, mixed-signal PCB design, and ESP32/STM32-based control systems including multi-rail DC-DC designs, precision current control, and noise-sensitive layouts. I have worked on similar projects involving high-voltage interfacing, PWM control systems, and industrial embedded platforms. I will design a robust architecture with efficient buck stages, proper isolation for HV control, precision sensing feedback, and EMI-aware multi-layer PCB layout. Firmware will support real-time control, timing accuracy, and clean communication with the Windows UI system. This is exactly the type of advanced system I handle confidently, and I am ready to take ownership of this project and deliver a production-ready design. Regards, Engineer Muhammad Usman

@majeed219

The real challenge here isn’t the schematic — it’s the noise discipline between a flyback HV stage and millisecond-precision current control sharing one board. Get the isolation and feedback paths wrong and the UI numbers lie. The ESP32 + Windows UI bridge is the easier half; the analog layout is where this lives or dies. Why me? •5+ years delivering ESP32 firmware with PWM control loops, UART/USB protocols, and feedback-driven regulation — directly relevant to the control side. •End-to-end ownership of MCU firmware, Windows UI protocol, and system integration under one contract. •Daily progress updates with schematic/layout reviews before Gerber lockdown. •2 weeks free post-fabrication firmware support after first board bring-up. •Response within 5 minutes during work hours across EN/HE. Worth a 20-minute call to walk through architecture and confirm fit before you commit?​​​​​​​​​​​​​​​​

@markoa7

Having worked on a variety of electronic product development projects, including several related to high-voltage and power systems, I believe I have the expertise required to successfully design and deliver your advanced control motherboard. With proficiency in designing multi-layer, noise-sensitive PCBs and thorough knowledge of EMI/EMC-aware layout practices, I can assure you that the board will be highly efficient and reliable. Moreover, my extensive experience with embedded systems, particularly STM32 and ESP32, meshes nicely with your project requirements. In terms of power management, my prowess in developing circuits for various DC-DC and AC-DC conversions completes a key puzzle piece needed for your system - an efficient one that is capable of handling the demanding 22V battery. Furthermore, I'll leverage my skill sets in RF circuit design and antenna optimization to ensure seamless communication with the Windows 11-based mini computer for UI processing - I understand this is pivotal as customary as it is important providing a consistent user experience.

@iamhamzazaki

With over a decade of experience in the field, I believe I'm uniquely qualified for your challenging project. My specialization in high-voltage and mixed-signal design, strong background in PCB layout, and extensive knowledge of power electronics make me an ideal candidate. I have worked specifically on projects involving voltage multipliers, diodes, and capacitor stages similar to what you'll be using. My skill set includes utilizing precise timing and current control which will be quite valuable here. To further benefit your project, I have hands-on expertise working with microcontrollers like STM32H743VIT6 with external ADCs such as ADS127L11 / AD7768 / ADS131M08 for high-speed ADC requirements that your project demands. Furthermore, I've also worked with FPGA's and am quite conversant with Amplification as well as precision and low-noise circuitry. I've successfully built several systems reliant on smooth USB/SPI communication between MCU and a Windows-based UI systems similar to what you're envisioning here.

@hayteekeys

HI, KINDLY READ THROUGH MY PROPOSAL I will deliver a complete production-ready single-board motherboard powered from 22V battery: multi-rail DC-DC power management (3.3/5/12/15V), ESP32 digital control with PWM HV driver interface, pre-heat subsystem, signal isolation, and clean UART/USB protocol to Windows 11 mini-PC for touchscreen UI — full schematic, 4–6 layer PCB layout, Gerbers, BOM and basic firmware. MY APPROACH ✅ Phase 1: Schematic capture, power tree, ESP32 pinout, HV PWM + feedback interfaces, protection circuits. ✅ Phase 2: Optimised multi-layer PCB layout (EMI/EMC-aware, analogue-digital partitioning), Gerber/BOM generation, basic ESP32 firmware skeleton. RELEVANT PROJECTS • 22V battery-powered HV control motherboard for medical X-ray system (multi-rail power, ESP32 PWM driver, pre-heat sequence, Windows UI integration — delivered Gerber-ready on time) DELIVERABLES • Complete KiCad/Altium schematic & PCB layout • Gerber/drill files + BOM with alternates • Basic ESP32 firmware structure (PWM, timing, comms) • Block diagram + design notes QUESTIONS 1. Preferred EDA tool (KiCad or Altium) and any existing reference files? 2. Exact HV control voltage/current ranges and pre-heat profile details? 3. Target date for Phase 1 schematic review? Ready to start immediately.

@yaroslavmark

Hi, I am a senior electronics engineer with 12+ years in high-voltage power and mixed-signal PCB design, having delivered 30+ multi-layer boards (up to 8 layers) with >95% first-pass success and systems handling up to 20kV interfaces with controlled EMI and <2% regulation error. I have designed DC-DC architectures (buck, boost, isolated flyback) achieving >92% efficiency, implemented ESP32/STM32-based control loops with sub-ms timing precision, and built robust UART/USB protocols for real-time control in industrial imaging and instrumentation systems. Approach ✅ I will design a clear system architecture separating power, control, and HV interface blocks. ✅ I will develop stable DC-DC converters and protection circuits for all required voltage rails. ✅ I will implement ESP32 control with PWM, feedback sensing, and reliable communication. ✅ I will create a clean multi-layer PCB layout optimized for EMI, thermal, and manufacturability. Questions ✅ I need to know the target HV output range and feedback requirements. ✅ I would like to confirm required safety and isolation standards. ✅ I need details on communication protocol with the Windows system. Best, Yaroslav

@Mahmoud00Ibrahim

Hi, This is not just a PCB task, but a full system design involving power electronics, mixed-signal layout, and HV-ready control — which aligns well with my experience. I can handle the complete motherboard design from architecture to Gerber-ready files, ensuring stability, protection, and clean integration between subsystems. My approach: * Efficient multi-rail power design from 22V (3.3V / 5V / 12V / 15V) with proper protections * ESP32-based control with precise PWM, timing, and parameter control * Clean, isolated interface for HV driver stage with strong noise immunity * EMI-aware multi-layer PCB layout with proper domain separation (power / analog / digital) * Reliable communication with the Windows UI (UART/USB) Deliverables: Schematic, PCB layout, Gerbers, BOM, basic ESP32 firmware structure, and documentation Tools: KiCad / Altium I’ve worked on power and control boards where stability and real-world performance were critical, not just schematic design. Ready to start with a structured, milestone-based approach. Best regards, Mahmoud Ibrahim

@jakubf41

Hello, I’m processing on similar project: 6 layers PCB using ESP32 and 90% completed.. Your project aligns strongly with my experience in advanced power architecture, precision control systems, and multilayer PCB design. I can develop a production-ready single-board motherboard integrating multi-rail power management, ESP32-based control, precision timing/current regulation, and a robust interface for external high-voltage generation stages. I have hands-on experience with high-voltage control systems, low-noise analog design, and embedded interfaces for industrial and specialized equipment. Estimated timeline: 7~10days, depending on final specifications and review cycles. I’d be pleased to discuss your architecture in detail and support both this phase and future system expansion.

@Specgi

With over a decade of experience in computer and electronics engineering, I have gained an in-depth understanding of power systems and control. My proficiency extends to developing advanced high-voltage systems with combined high-level skills in PCB design, power electronics, embedded systems, mixed-signal design, EMI/EMC-aware layout practices and much more. I am well-versed with KiCad, Altium Designer and Proteus - all the tools needed for this project. In addition to possessing the desired technical know-how, I bring on board exceptional problem-solving skills that prove instrumental in successfully executing complex projects such as this. Your project would benefit greatly from my strong background in high-voltage power systems and extensive experience in designing multi-layer PCB layouts for noise-sensitive applications. Moreover, my sound knowledge of the STM32 H7 and FPGA will ensure a smooth integration between the microcontroller and Windows-based UI system.

@nichitav7

Hello I will deliver a robust, production-ready single-board architecture by structuring clean power domains, an isolated MCU control system, and a noise-resilient PWM-based interface designed for precise current, voltage, and timing control with future HV expansion readiness. CONFIRMATIONS: -22V battery input system -Multi-rail outputs: 3.3V / 5V / 12V / 15V -ESP32-class MCU control core -Windows 11 UI via USB/UART communication layer -External HV stage controlled via low-voltage PWM interface -Pre-heat sequence: 5-step ramp, ~60s, ~3V / ~2.7A target SYSTEM APPROACH: -Segmented power architecture (high-efficiency buck conversion per rail) -Analog/digital domain isolation with controlled grounding strategy -PWM-driven control layer with filtered and protected outputs -Precision current sensing using shunt + instrumentation amplification -Noise-aware PCB layout (short return paths, star grounding, plane separation) -EMI mitigation via shielding strategy and controlled switching loops -Modular firmware design for real-time parameter control and scaling DELIVERY / SCOPE: -Full schematic design (multi-rail + control system) -Production-ready PCB layout (multi-layer, EMI-optimized) -Gerber fabrication package -BOM with validated industrial components -ESP32 firmware baseline (PWM control, feedback loop, comms stack) -Lightweight communication protocol for Windows UI integration -System block diagram + design documentation Best regard, Nichita

@akshayrukade01

Hi, I'm Akshay, Founder of ZiroEDA, an electronics design startup incubated at IIT Madras. We recently closed our seed round, and I’m personally taking on this project. I am bidding for Phase 1 to build a production-ready board designed for Phase 2 expansion. Why ZiroEDA is the Right Partner: Proven Traction: As a venture-backed startup out of IIT Madras , we prioritize safety and industrial compliance. Mixed-Signal Expertise: My background includes designing 30A motor controllers and high-precision audiophile preamps. I specialize in keeping sensitive logic (ESP32) stable in noisy, high-power environments. Technical Strategy: Isolation Barrier: High-speed digital isolators between ESP32 and 12V driver domain to protect your Windows 11 host from HV transients. Power Tree: Synchronous Buck converters for 3.3V, 5V, 12V, and 15V rails for efficiency and thermal control. Phase 2 Ready: Pre-mapped control pins and power headroom for 5-step ramp (3V/2.7A). Phase 1 Deliverables: KiCad Schematic & 4-Layer PCB Layout Manufacturing Package (Gerbers, BOM, Pick-and-Place) ESP32 Firmware Framework Phase 2 Integration Map I’m ready to discuss your HV flyback specs and get started. Best, Akshay Rukade Founder, ZiroEDA | IIT Madras

@manojachanta7172

Hello I design mixed signal control boards where power integrity and timing accuracy are critical. Your system requires tight coordination between multi rail power, PWM driven control, and a noise sensitive interface to an external high voltage stage. That is exactly the type of work I handle regularly. I will architect a clean power tree from the 22V source with proper sequencing, protection, and thermal margins. The control section will be built around a robust MCU framework with deterministic timing and stable PWM generation. Special attention will be given to grounding strategy, isolation boundaries, and layout to prevent switching noise from corrupting control signals. For the preheat and current regulation stage, I will implement a closed loop approach with predictable ramp behavior. On the communication side, I will define a simple and reliable protocol so your Windows UI can control parameters in real time without latency issues. You will receive production ready schematics, layout, Gerbers, and a practical firmware base that is easy to extend. I focus on designs that work the first time on hardware. Let’s discuss your constraints and move this forward. Best regards, Manoj Kumar A.

@jb095

Hi, this project fits my background very well. I have experience in power electronics, embedded control, PCB design, and mixed-signal systems, including high-voltage related control architectures. I can help with the full board design, power management, ESP32 control section, PCB layout, and system integration with the Windows UI side. The combination of multi-rail power, PWM control, isolation-sensitive layout, and precision current/timing control is very much in line with the type of work I do. I also have experience with high-voltage power concepts, which is relevant for the control side of your architecture. I can support schematic design, production-ready PCB, Gerbers, BOM, and basic firmware structure, and I’d be interested in supporting Phase 2 as well. Please feel free to review my profile, including my UMS-related project, which shows related control-system experience. I’d be glad to discuss your architecture and help move this toward a practical prototype. Thank you.

@Ryan15222

Hi, I’m interested in delivering your 22 V-powered control motherboard. I’ll be direct: combining multi-rail power, precision sensing, and HV control demands strict isolation, noise control, and staged architecture—this is where I focus. Architecture approach Power tree: 22 V → multi-rail DC/DC (3.3 V, 5 V, 12 V, 15 V, 24 V, 3 V filament) using high-efficiency buck/isolated stages with OVP/OCP/thermal protection Control core: STM32H743VIT6 + external high-resolution ADC (e.g., ADS127L11 / AD7768) for PMT signal chain (low-noise amp → filter → ADC) HV interface (control side): PWM (0–12 V domain) with galvanic isolation, feedback-ready sensing, EMI-hardened layout Pre-heat subsystem: Closed-loop 3 V / 2.7 A with 5-step ramp over ~180 s and periodic maintenance profile Comms: Clean UART/USB protocol to Windows 11 UI (real-time voltage/current/time control) What I will deliver Complete schematics + multi-layer PCB (Gerber-ready) BOM with vetted components Firmware framework (STM32H7 control, timing, ADC acquisition) Design notes (block diagrams, isolation/EMI strategy, bring-up guide) Experience High-voltage interfacing and mixed-signal systems Precision analog front-ends and high-speed ADC integration Industrial-grade PCB design with EMI/EMC considerations Timeline ~4–6 weeks (architecture → layout → review iterations) I focus on robust, low-noise, and production-ready designs suitable for complex HV-integrated systems. Best regards,

@hayleyc27

As an experienced electronics engineer, I am confident that I possess the necessary skillset to tackle every aspect of your advanced high-voltage control motherboard project. My expertise in PCB design with KiCad, Altium, and Proteus is well-founded - I've executed a wide range of projects featuring multi-layer layouts, mixed-signal designs, and real-time parameter control not unlike your demands. It's worth mentioning that I also have an understanding of EMI/EMC-aware layout practices which is crucial in mitigating noise interference that can compromise system performance. Notably, my proficiency in embedded systems - specifically working with ESP32 and STM32 microcontrollers - enables me to translate your design needs into practical solutions. I can develop the required adjustable parameters, like voltage and current control in both high-level and low-level precision ranges. Furthermore, I am well-equipped to interface the generated high-voltage with external stages, ensuring effective isolation and feedback-ready functionalities.

@TheTech15

Hello. I am computer engineer experienced in: arduino programing, pcb design using altium designer and creating windows graphical user interface (GUI) to control and monitoring embedded systems using c#. You can check my profile for previous work. Nice to me to be part of your team. Thanks in advance….

@oleksiir2

Hi, there This is a serious mixed-signal + power design project — and it needs to be done carefully from architecture level, not just schematic/PCB execution. I’ve worked on systems combining multi-rail power, MCU control, and noise-sensitive analog/high-voltage interfaces, where layout and power design directly impact stability and performance. How I’d approach this - Define a clean power architecture (22V → 15V / 12V / 5V / 3.3V) with proper protection and sequencing - Separate HV / switching noise from sensitive analog + MCU domains - Design a robust control interface to the HV stage (with isolation and feedback readiness) - Implement stable current/voltage control loops (including pre-heat ramp stage) - Create a clean communication layer between ESP32 and the Windows UI - Then move into schematic + a carefully planned multi-layer PCB focused on EMI, grounding, and reliability. Deliverables - Full schematic + PCB (Gerber-ready) - BOM (production-ready) - Basic ESP32 firmware structure - Design notes + documentation Timeline ~2–3 weeks depending on iterations and review cycles Budget For this level of design (architecture + schematic + PCB + firmware base): $1,500 – $2,000 fixed (depends on complexity of HV interface, iteration rounds, and how deep we go into firmware/control tuning) If you can share more details about the HV stage or constraints, I can tighten both scope and cost early. Happy to take this end-to-end and continue into Phase 2.

@nikolaic5

Hello client, Nice to meet you. I have carefully read your project and concluded I am right person for this project. I have experienced in imaging systems with high voltage applications. And also I know about safety compliance and isolation design and so on. If you contacted with me I will share you my previous project when I worked at Tesla company. Looking forward to your feedback. Best, Nikolai