Wearable biosignal research prototype (EMG + IMU + ToF)

@Mahihassi

As an Electrical Engineer with a Master's in Embedded Systems, I am uniquely qualified to deliver your wearable biosignal research prototype. My experience in firmware development, PCB design, and IoT product engineering will be invaluable in ensuring the successful integration of your high-rate sensors and reliable data capture. I'm well-versed in time-stamping data onto a single clock and logging it via USB to a PC, which is precisely what you need. With my skills, I promise a working electronics prototype that perfectly aligns with your requirements. Apart from the electronics, I'll provide wiring diagrams, a BOM, and simple mechanical mountings to streamline your internal research process. Rest assured, this would be purely an engineering prototype; I've deeply understood the absence of mass production expectations or certifications. My work doesn't end at providing just prototypes, but with developing those ideas right up to the final product. I can bring everything together- from the system architecture to web & mobile app development for real-time dashboards & control apps as well as mechanical CAD modeling for housing parts. You won't have to juggle several freelancers; instead, you'll have one point of contact for all your needs. If you choose me, Sardar Hasnain - an engineer committed to delivering robust embedded solutions - you can be certain of a transformative journey from idea to reality. Let's begin!

@cpp2048

This is a fascinating project that aligns well with my extensive experience in precision analog and mixed-signal measurement design. Since the analog signal levels are not yet specified in the documentation, I propose we discuss that requirement in detail. My approach includes designing the hardware, building and validating a functional prototype using my own precision analog test equipment, and developing the associated firmware. I will also provide a 3D-printed mounting bracket for your convenience and offer ongoing support for weeks after delivery. If needed, I can also develop desktop software for data capture and visualization, though that would be outside the current scope. Please reach out so we can discuss the details further.

@macroenergy

As a seasoned engineer with extensive expertise in areas such as digital motor control and embedded systems, I firmly believe I am the ideal individual to execute your wearable biosignal research prototype project. The integration of high-rate sensors, timestamp synchronization, and reliable data logging are all in my wheelhouse. I've been involved in similar projects incorporating multiple sensors including EMG and IMU at various sampling ranges. Furthermore, the fact that you're seeking a working electronics prototype without the need for industrial design or mass production aligns perfectly with the direction I've taken in my career. My focus has been on functional engineering specifically designed for internal research. Rest assured that not only can I provide a fully functional prototype as per your specification but also an accompanying firmware for synchronized multi-sensor logging. Lastly, my adeptness in PCB design and layout will guarantee your electrical setup is well-executed. From past experience in generating accurate wiring diagrams to selecting the right off-the-shelf components from BOM, I vow to deliver pristine work that lives up to your expectations. Let me be the one to transform that technical PDF into a tangible product that meets all your needs effectively and efficiently.

@markoa7

As a seasoned electronic hardware and firmware engineer, I am confident in my ability to bring your vision of a wearable biosignal research prototype to life. My proficiency in PCB design and development is particularly well-suited for this task as I have extensive experience with high-performance PCBs for embedded systems such as the one you have described. From power supply circuits to multilayer designs for data synchronization, I ensure that every component operates harmoniously and delivers reliable results. Moreover, my expertise in microcontroller programming-I've worked with the STM32, DSPIC, ESP32, and ESP8266-will prove invaluable to ensure correct sampling, synchronization and reliable data capture of your high-rate sensors. Equipped with a thorough understanding of communication protocols including USB, I will create an absolutely synchronized multi-sensor logging firmware. Finally, what truly sets me apart from other freelancers is not just my technical skills but my commitment to deliver cost-effective, high-quality solutions without compromise. With a focus on efficient LED driver circuits and RF PCB layouts, I prioritize performance while adhering to realistic budgets. Allow me the privilege of turning your detailed technical PDF into a fully functioning prototype-a testament to the meticulousness, drive and passion that underpin all my projects.

@Feriver

Hello, I understand you’re looking to develop a functional wearable biosignal research prototype integrating EMG, IMU, and ToF sensors for synchronized data capture. I have extensive experience in embedded systems, multi-sensor integration, and real-time data logging, including high-rate sensor acquisition and timestamp synchronization across multiple data streams. My approach will involve selecting a suitable microcontroller capable of handling the high-frequency EMG (>1 kHz) alongside the slower IMU and ToF sensors (100–400 Hz and 30–60 Hz), implementing firmware that ensures all data are timestamped on a single clock, and reliably logged via USB to a PC. The prototype will be powered via USB, with a flexible, functional form factor. I will also provide simple mechanical mounting options, either 3D-printed or off-the-shelf, a complete wiring diagram, and a full BOM for all components. Deliverables include a working electronics prototype with firmware, synchronized multi-sensor logging, mechanical mounting, wiring diagram, and BOM. The focus is on correct sampling, precise synchronization, and robust data capture for research purposes. This approach ensures a fully functional and reliable prototype suitable for internal experimentation and testing. Thanks, Asif

@ayesha0124

Hi there, I'm excited about the opportunity to develop your wearable biosignal research prototype. With a strong background in embedded systems and extensive experience in PCB design, I am confident in my ability to deliver a high-quality functional prototype that meets your specifications. I have worked on projects that required synchronization of multiple sensors, and I fully understand the importance of correct sampling and reliable data capture. I will ensure that the system integrates the specified high-rate sensors and timestamps all data streams accurately, logging them via USB as requested. Additionally, I can provide a straightforward wiring diagram and a Bill of Materials (BOM) to assist with future developments. I anticipate completing the prototype, including firmware and simple mechanical mounting, within 30 days. Let's make this innovative project a success! Best regards,

@Specgi

With a background that spans an array of technologies and fields, I am confident in my ability to meet the technical demands of your wearable biosignal research prototype project. Specifically, I have extensive experience in programming and developing electrical hardware/systems, including proficiency with C and C++ programming as well as PCB design and layout. Your project aligns perfectly with these skills, requiring high-rate sensor integration and synchronized data logging - all well within my capabilities. Moreover, my proficiency in Python opens up possibilities for simplified firmware development while my knowledge of cloud platforms like AWS and Google Cloud Platform lends itself to effective data stream management, important for your requirement of timestamped data on a single clock that must be logged via USB. Further complementing this is my meticulous approach honed from years in the industry to ensure reliable data capture. Additionally, my familiarity with mechanical mounting techniques such as 3D printing alongside the wiring diagram creation and Bill of Materials expertise ensure that I bring a comprehensive set of skills to every aspect of your project. I understand the demand this project places on precision hence I will meticulously deliver both efficient and reliable services for your wearable biosignal research prototype project.

@dnx38

Hello, I am a Mechatronics engineer with extensive skills in Prototyping, electonics and biochemistry. I have recently completed several biosensor-based projects, one of which was based around a 3-electrode sensor with working, reference and counter electrodes from silver and silver chloride on a substrate. I have also worked on a microneedle patch interfaced with a potentiostat, functioning around a similar principle. Please message me for more discussions.

@ail5a9f298b597ed

Experienced embedded systems engineer with hands-on expertise building **multi-sensor, high-rate data acquisition prototypes**. I can deliver a fully functional USB-powered prototype that synchronizes all sensor streams on a single clock, logs timestamped data reliably to a PC, and meets your sampling rate requirements (>1 kHz and lower-rate sensors). I’ll provide complete firmware, wiring diagrams, BOM, and simple mounting solutions—focused purely on **engineering functionality, accuracy, and robust data capture** rather than industrial design or certifications.

@redbrickamerica

Hello! We're prepared to tackle your wearable biosignal research prototype project with precision and expertise. Our team excels in PCB layout, Arduino, C/C++ programming, and embedded systems like ARM, ensuring seamless integration of high-rate sensors and synchronized data logging. We'll deliver a functional prototype meeting your specific requirements, with a focus on correct sampling, synchronization, and reliable data capture, all powered via USB. Our deliverables will include the electronics prototype, firmware for multi-sensor logging, simple mechanical mounting, wiring diagram, and BOM. Let's start shaping your research prototype! What's the best way to begin?

@gpd2007

Hi , Thanks for posting your biosignal research project. I have designed a portable EEG based on ADS1298 and current regulators for brain biostimulation, managed from PC. Can also produce custom 3d printed enclosures This is my proposed solution: SUMMARY: STM32 controller board with 3 sensors. USB-C port Packet format as per your description Simple UI for serial terminal on PC, with a menu for start/stop captures and export data as raw binary or CSV. Details of sensors on PM 3d printed enclosure resembling hearing aids Demo video showing operation and output before shipping DELIVERABLES: - Circuit diagram (.PDF) - PCB manufacturing files (Gerber, pick-and-place, drill list, etc.) - Bill of Materials (BOM) (.XLSX), including supplier-specific formats - Prototype(s) assembled and shipped. - Source code and firmware image (.HEX) - 3D CAD model of the board (.STEP) - 3d-printable CAD of enclosure (.STEP, .STL) - Documentation: programming guide for firmware updates. - 3D previews of the board (.PDF) BACKGROUND: 12+ years of experience in hardware design, including: - Circuit design and simulation (Altium Designer) - PCB layout for high-speed and multilayer boards - Programming in C, C++, Arduino, Python, Pytorch, NumPy - CAD design (AutoCAD Mechanical), producing models in STEP, STL, DWG and other formats. Please review my portfolio for examples of past projects. I hope this meets your requirements. Looking forward to your reply. --- Best regards, Gonzalo Pérez, EE

@electronicsdone

Best Wearable Multi-Sensor Biosignal Prototype Partner ⭐⭐⭐⭐⭐ Hi Matei, Thanks for sharing the scope clearly. I’ve developed multi-sensor embedded prototypes where precise sampling, synchronization, and reliable data logging were critical. Your project is very doable. The goal is simple: deliver a fully functional, USB-powered research prototype that integrates EMG, IMU, and ToF sensors with accurate timestamping and synchronized data capture. ✅ How I’ll Help You Succeed 1. Review your technical PDF and sensor requirements to design a complete electronics prototype. 2. Integrate high-rate sensors with synchronized logging and USB data output to a PC. ✅ I’ve delivered embedded research prototypes where careful sensor integration, timing accuracy, and robust data capture ensured reliable experimental results. ✅ Before I start, one quick thing: please share the sensor list and detailed PDF so I can begin designing the synchronized prototype. If you share that, feel free to message me, and we can align quickly. Best, Prat PCB Must Innovations

@abids98

I am a Robotics Researcher(Recent article: CHIGLU: A Modular Hardware for Stepper Motorized Quadruped Robot—Design Approach and Analysis)specializing in sensor fusion and embedded control. I understand that this prototype is a scientific instrument,. My priority is data integrity—ensuring your EMG, IMU, and ToF streams are synchronized with microsecond precision for valid analysis. My Technical Approach: Central Hub (Teensy 4.1): Standard Arduinos cannot handle 2kHz EMG/Vibration + 400Hz IMU streams simultaneously without jitter. I will use the Teensy 4.1 (600 MHz) to buffer all sensors into a single struct with a shared ms timestamp before USB transmission. This guarantees that your EMG spikes align perfectly with your ToF depth frames. Sensor : ToF (Depth): I will use the VL53L5CX (8x8 Matrix) to track the vector of mouth corner movement, rather than just a 1D distance. Bone Vibration: I will mount a high-bandwidth accelerometer on a compliant flexure to ensure constant 20-40g pressure on the mastoid, regardless of head movement. Mechanical Stability: I will reinforce the 3.5cm ToF arm with a steel wire core to prevent oscillation during speech, ensuring the aim angle remains rigid relative to the ear canal. Data Pipeline: a Python script that logs directly to your requested HDF5 structure (/signals/emg, /signals/tof, etc.) for immediate import into MATLAB/Pandas. I treat this build with the same rigor I apply to my own robotic platforms.

@draganm59

With my extensive 10+ years of experience spanning various fields such as robotics, IoT, industrial automation, and smart devices, I have honed my skills to a point where I can craft reliable solutions for any challenge under the sun. Your wearable biosignal research prototype project speaks to this and more. In addition to your hardware requirements, I have deep capabilities in software development- perfect for accurately timetabling multi-streamed data logging and integration of different sensor inputs. I understand the immense need for a dependable synchronization and accurate data capture as you delve into concentrated research. In past projects involving frontend/backend development with major languages like Python, C++, and JavaScript, I have demonstrated proficiency in handling high frequency (1kHz), middle (100-400Hz), and low range (30-60Hz) ). Furthermore, my ability to build cloud-based dashboards will prove crucial in helping you gain insights from the logged bio-data. Lastly, while true you indicated no needs for certifications, design or mass production, rest assured that my skill set isn't limited to these areas either. My flexibility extends to completing simple mechanical mounting tasks via 3D prints or off-the-shelf products at as well as preparing wiring diagrams & BOMs for your project. The two crucial items you seek- 'working electronics prototype' and 'firmware for synchronized multi-sensor logging'- align perfectly with what I can effectively deliver. Choose me for this project, let's bring your detailed technical PDF into stunning realization.

@dtk507

Hello! I understand you're looking for a functional prototype of a wearable biosignal system to support your internal research goals. With extensive experience in developing multi-sensor embedded systems, I've successfully delivered similar projects that required precise synchronization and reliable data capture. ****My Plan****** - Analyze the specifications in your technical PDF. - Develop and test firmware to achieve synchronized, multi-sensor logging. - Create a wiring diagram and BOM for clarity. - Design mechanical mounting solutions using 3D printing or off-the-shelf components. - Ensure all data streams are timestamped correctly and logged via USB. I'll focus on maintaining your requirements for high-rate sensors and USB power supply while ensuring seamless performance. I'd love to discuss how we can proceed! Regards, Davide

@yaroslavmark

✅Okay, I got what you want exactly. I am a senior embedded systems and electronics engineer with over 10 years of experience, providing ARM-based firmware, high-rate sensor integration, USB data logging, RTOS, and custom PCB design. In my opinion, the key to this project is designing a clean timing architecture where all sensors are driven or captured off a single hardware timebase, rather than trying to align data in software after the fact. I would focus on deterministic sampling using hardware timers, DMA where possible, and a robust USB logging pipeline to ensure zero data loss at >1 kHz rates. This project is very similar to my previous works. I’ve built a wearable EMG + IMU research device using an STM32 where EMG was sampled at 2 kHz while a 9-axis IMU ran at 400 Hz, all synchronized via a shared timer and logged over USB CDC to a PC. I also designed the PCB, handled analog front-end noise isolation for biopotential signals, and delivered a full BOM and wiring documentation. ✅ So, I will divide your project like following: ⚡ Review your technical PDF and finalize sensor timing and architecture ⚡ Schematic + PCB design with proper analog/digital separation ⚡ Firmware development for synchronized multi-sensor acquisition and USB logging ⚡ Assembly, bring-up, validation, and delivery of documentation Best regards. Yaroslav

@Zawiya3

As a seasoned engineer with extensive expertise in C and C++ programming and an accomplished background in electronics design, I believe I am uniquely qualified to deliver the wearable biosignal research prototype you're looking for. My career has been filled with successfully executing complex projects like this, from circuit design and schematic capture to PCB layout and firmware development. Moreover, I'm no stranger to leveraging multiple high-volume sensors, synchronizing data streams on a single clock, and creating reliable systems with distinctly different sampling rates - all skills crucial to accomplishing your objectives. My exposure to dealing with limited power sources in electronic designs, such as the 'USB only' parameter of this project, also adds to my suitability. Let's not overlook my proficiency in real-time operating systems (RTOS) – highly relevant when it comes to your emphasis on correct sampling, synchronization, and reliable data capture. These strongly align with my skillset. All these factors considered, I’m confident in my abilities to produce not just a functional prototype but one that effectively logs data via USB to your PC. Matched with my commitment to precision engineering, hiring me for your project guarantees not just timely completion but successful results that meet your stringent needs!

@abdf2010

Hello there, I reviewed your project Wearable biosignal research prototype (EMG + IMU + ToF) and understood the requirements at a high level. I focus on delivering clear, stable, and maintainable solutions aligned with the actual scope, I can work with C Programming, Electronics, Microcontroller and follow a clean development process with proper structure and error handling. If this aligns with what you’re looking for, please come to chat to discuss further. Best regards

@leonidye

Hi, I have seen your JD carefully. I can build a functional, USB-powered prototype that reliably samples and synchronizes multiple high-rate sensors and streams/logs all data to a PC with a single unified timestamp clock. I’ll start by reviewing your technical PDF to confirm exact sensors/interfaces (SPI/I²C/UART/analog), bandwidth requirements, and any clocking/trigger constraints, then select an appropriate MCU/SoC (e.g., STM32/Teensy/ESP32-S3 depending on throughput and USB mode). The firmware will use hardware timers + DMA and an RTOS or bare-metal scheduler to guarantee deterministic sampling at >1 kHz and the 100–400 Hz / 30–60 Hz channels, with a robust packet format, sequence counters, and error handling for dropped frames. I will deliver a working electronics prototype (dev board or custom PCB as needed), a simple mounting solution (3D print or off-the-shelf), and a USB logging utility (or documented protocol for your PC-side app). You’ll receive the full wiring diagram, BOM, and source code with build instructions, plus a validation report showing achieved sample rates, jitter, and synchronization accuracy. I’m comfortable handling schematics/PCB layout, bring-up, and firmware debug to ensure stable long-run capture. Best, Leonid Y.