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1 Project overview We are developing a medical neurostimulation device intended for therapeutic applications, including tinnitus treatment. The system consists of: • A central unit based on a Toradex Verdin [login to view URL] 8M Mini SOM • Up to five body-mounted emitters • Custom electronics responsible for signal generation, power control, safety monitoring and communication with the Toradex platform The project is already well defined at system level, and hardware development can start immediately. ________________________________________ 2 Scope of Work Design a custom electronics board capable of controlling up to five emitters simultaneously. Each emitter includes: 2.1 Inductive Channel • Resonant coil • Approximately 35 kHz sinusoidal carrier • Current-controlled operation preferred • Automatic resonance tuning • Optional AM modulation from an audio signal (25 Hz – 8 kHz) 2.2 Capacitive Channel • 6 MHz sinusoidal excitation • Variable load depending on patient coupling • Real power control preferred • Independent control per emitter 2.3 Additional Functions • Temperature sensing (optional) • Safety monitoring • Power management • Audio input/output • Communication with Toradex SOM • Embedded firmware development ________________________________________ 3 Existing Assets The project is not starting from scratch. Available resources include: • Selected Toradex platform • Initial emitter prototypes • LTspice simulations • Preliminary coil measurements • System architecture definition • Technical support from experienced electronics engineers who will participate in periodic design reviews ________________________________________ 4 Deliverables • System architecture • Schematics • PCB layout • BOM • Embedded firmware • Prototype bring-up and validation • Support for manufacturing of the first prototype batch ________________________________________ 5 Desired Skills We are looking for engineers with experience in one or more of the following areas: • Analog electronics • Mixed-signal electronics • Power electronics • RF electronics • Resonant circuits • Embedded firmware • Medical devices (preferred but not mandatory) ________________________________________ 6 Schedule Target schedule: • PCB layout within approximately 1 month • First assembled and tested prototype within approximately 2 months Alternative schedules may be proposed if technically justified. ________________________________________ 7 To Apply Please provide: 1. A short description of your relevant experience 2. Examples of previous projects involving: o Analog electronics o RF or resonant circuits o Power electronics o Medical devices (if applicable) 3. Your expected availability over the next 2–3 months 4. Whether you are an individual freelancer or part of a design company Selected candidates will receive the complete technical specification document and will be invited to a technical discussion before project assignment.
Project ID: 40477384
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25 freelancers are bidding on average €10,160 EUR for this job

Since 2003 I am working in Digital Electronic. So more than 18 years of experience in Electronics. Arduino NANO/UNO/MEGA, ESP32 and Raspberry PI to build a digital device to read sensor data and send it to the web server, motor control, control relay switches and LEDs. More than 5(five) years of experience in Arduino design and build. If you want an excellent and error-free project delivery, then send a message to me, please. Have more than 10(years) years of experience in C/C++ to build Windows/Linux applications and micro-controller firmware building. If you want a good job delivery, then send a message to me, please. Since 1995 I have been working on Analog and Digital Electronics to build any kind of device. I have build lots of devices. So more than 20 years of experience on Electronics. Including power supply design. Any kinds of schematic and PCB design. Expert PCB design in EasyEDA Pro IDE.
€12,000 EUR in 60 days
6.7
6.7

As an Electrical and Electronics Engineer with a diverse experience across automation, process control, and embedded systems integration, I believe I have the right skills to tackle your neurostimulation device project. I have rich experience in designing custom electronics boards and have a deep understanding of the various elements outlined in your project description including analog electronics, power electronics, resonant circuits, and RF electronics. Additionally, over the course of my career, I've been involved in various system architecture designs which would be helpful for this project. My previous work on wastewater treatment plants involved integrating and controlling complex electrical systems for maximum process efficiency. Similarly, with your medical neurostimulation device project, I can assure you of a comprehensive approach that focuses on accuracy, safety, and reliability. My experience in medical devices is limited but I'm confident that my ability to quickly grasp project requirements combined with the technical support available will ensure its smooth execution.
€9,500 EUR in 45 days
5.1
5.1

Dear Client, The biggest risk in this project is not designing inductive and capacitive stimulation channels. It is building a mixed-signal, multi-emitter medical system that remains stable, safe, and controllable when high-frequency resonant circuits, precision power control, sensing, and embedded firmware all interact in real biological conditions. That is where advanced analog, RF, and safety-critical embedded system design experience matters. I would approach this by: 1. Designing stable LC resonant networks for inductive operation with adaptive tuning capability to compensate for coil variation, load coupling changes, and biological impedance shifts. 2. Implementing controlled current/voltage drive stages with feedback loops to ensure stable energy delivery across varying tissue impedance conditions without overshoot or drift. 3. Designing a robust communication layer (SPI/I2C/UART as appropriate) for real-time control, telemetry feedback, calibration, and synchronized multi-channel operation. One key question: Should V1 prioritize maximum control precision per channel (more complex analog control loops), or simplified but highly stable fixed architecture for first clinical feasibility validation? Message me and I’ll outline a clean engineering path to move this from system definition into a controlled, safe, and testable multi-emitter prototype with clear validation steps. Best regards, Prat PCB Must Innovations
€8,000 EUR in 20 days
6.4
6.4

Best Electronics Mixed-Signal Design Expert ⭐⭐⭐⭐⭐ Hi, When I saw your requirement for a Medical Neurostimulation Device involving multi-emitter control, resonant inductive channels, and capacitive excitation, it immediately reminded me of several complex mixed-signal and power electronics projects I’ve worked on involving resonant systems, multi-channel analog control, safety-critical embedded design, and system-level hardware integration. ✅ I have 11+ years of experience in analog electronics, mixed-signal design, power electronics, embedded hardware systems, and multi-channel PCB development. ✅ I can help you design the full system including architecture, schematics, PCB layout, BOM, prototype bring-up, and validation support. Before proceeding, may I clarify: 1. Should each emitter have independent power control or shared driver with per-channel regulation? 2. For inductive resonance, do you prefer hardware tuning or digital feedback-based control? Two quick suggestions: ✅ Ensure strong electrical and thermal isolation per emitter channel for safety and stability ✅ Use closed-loop control for resonance and current regulation to maintain consistent output Freelancer doesn’t allow me to message first — happy to help you build a safe, reliable, and production-ready medical electronics system from architecture to prototype stage. Kind regards, Avi Gupta Quality is never an accident
€8,000 EUR in 12 days
3.0
3.0

Greetings! I will design your custom electronics board for up to five emitters with inductive channel resonant coil at 35 kHz, current controlled operation, automatic resonance tuning, AM modulation from audio signal 25 Hz to 8 kHz, capacitive channel at 6 MHz, real power control, temperature sensing, safety monitoring, power management, audio input output, Toradex SOM communication, and embedded firmware. Deliverables include schematics, PCB layout, BOM, firmware, prototype bring up and validation. PCB layout within 1 month, prototype within 2 months. Individual freelancer. Please share your LTspice simulations and coil measurements. Thanks, Revival
€7,000 EUR in 30 days
1.5
1.5

As an Electronics Design Engineer specializing in innovative Hardware Engineering, my skill set perfectly matches your project requirements. I have a wealth of experience in developing products from concept to production and understand the importance of considering all aspects from signal integrity to power efficiency and EMI reduction. Drawing on my expertise in Analog, RF, Mixed-signal circuits, Power electronics and resonant circuits, I can engineer a custom electronics board that aligns with your needs. My proficiency in Embedded Firmware development complements my hardware skills. I'm adept at creating robust and efficient firmware for IoT applications like your project demands. Additionally, having worked on various medical device projects, I am aware of the specific compliance standards that need to be adhered to when designing medical-adjacent devices like yours, making me tailor-fit for this role. This is Jiayin's time: Armed with efficient tools such as Altium Designer and KiCAD for PCB design and analysis, ADS and CST for RF design and EMC respectively, I am equipped to handle each stage of this project proficiently. If chosen, I can guarantee timely delivery of high-quality work coupled with strong communication skills and a keen intention to understand your vision fully and deliver excellence. Let's chat about how our combined forces can make a massive impact!
€9,500 EUR in 7 days
0.0
0.0

Imola, Italy
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