Custom 16-Channel EEG Board Design

@MuhammadUzair16

Hi I am an embedded systems engineer with over 16 years of experience. I have extensive experience with low-noise mixed-signal PCB design for biomedical/data acquisition hardware, including ADS1299-based EEG front ends, synchronized SPI ADC chains, ESP32 wireless firmware, LiPo charging, USB-C programming, and production-ready Altium files. Yes, I have proven experience with ADS1299 designs and multi-layer analog/digital routing. For your 16-channel board I would merge the Cyton/Daisy architecture into a compact Altium design, keep both ADS1299s locked to the same clean clock, pay careful attention to reference, bias, input protection, ground return paths, shielding/keepouts around the ESP32, and verify that SPI buffering and WiFi/BLE throughput can comfortably support 250 Hz with headroom for 500/1000 Hz. I can also adapt the ESP32 firmware so the output remains compatible with the OpenBCI GUI. I will provide full Altium source, Gerbers, BOM, pick-and-place, and assembly-aware component selection for Mouser/Digi-Key/Aisler. A few details I would confirm are ESP32 module vs bare chip, electrode connector preference, and whether you want any enclosure constraints considered now. Please contact me to discuss details.

@macroenergy

As an experienced electrical engineer with a comprehensive skill set in electronics, embedded systems, microcontrollers, and PCB layout, I believe I'm the perfect fit for your custom 16-channel EEG board. My vast experience in digital motor control allows me to apply rigorous flux estimation algorithms and DSP implementation similar to what you require. I also have specific experience with the ADS1299 and multi-layer mixed-signal routing - a crucial aspect of your project. In addition to my technical competence, I’m well-versed in using Altium for schematic design, PCB design and generating manufacturing files. This means you'll benefit from a smooth and efficient process right from the start. Moreover, my comfort with choosing current parts in stock at Mouser or Digi-Key for assembly aligns perfectly with your preferred method through Aisler.net. Finally, parallel concerns over low-noise layout and shielding will not go overlooked. Due to natural instincts developed through analog designs (low power distribution, noiseless special opamp based analog circuits), strategies like isolating the ESP32's RF noise from the analog front-end hold no secrets to me. All things considered, I offer you not only expertise but also efficiency without compromise on quality and adherence to specifications. Let’s get started on making your EEG board prototype a success!

@engrusmanfaiz

Hi, The biggest challenge is integrating two ADS1299 ADCs with a shared clock while keeping the ESP32 RF section isolated from the sensitive analog front-end to achieve low-noise, synchronized 16-channel EEG acquisition. With 12+ years of experience in mixed-signal PCB design, ESP32, RF layout, and high-speed SPI systems, I can confidently deliver a compact, production-ready Altium design optimized for signal integrity and manufacturability. I have designed multilayer embedded systems involving precision analog circuits, battery-powered medical/IoT devices, USB-C, LiPo charging, and wireless communication. The design will include proper analog/digital partitioning, controlled grounding, low-noise power architecture, and firmware adaptation for OpenBCI GUI compatibility with robust streaming up to your target sampling rates. You’ll receive complete Altium source files, Gerbers, BOM, Pick-and-Place files, and full manufacturing documentation using components available from Mouser/Digi-Key. Regards, Engr. Muhammad Usman PCB Pro Expert

@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:  Antenna Design (CST, HFSS)  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.

@yaroslavmark

Hi, I am a Senior PCB Design Engineer with 10+ years of experience in mixed-signal, RF, and embedded hardware design, including low-noise sensor systems, STM32/ESP32 platforms, and 4-layer/6-layer production PCBs; I have developed IoT and biomedical-style acquisition boards with controlled impedance, power management, and EMI optimization. Approach: ✅ I will redesign the OpenBCI Cyton + Daisy architecture into a single compact PCB using dual ADS1299, shared clock, ESP32, MicroSD, USB-C, and LiPo charging. ✅ I will optimize the PCB layout with separated analog/RF sections, proper grounding, power filtering, and noise reduction techniques for EEG signal quality. ✅ I will verify SPI performance, sampling stability, wireless streaming, and prepare Altium source files, Gerbers, BOM, and Pick-and-Place files. Questions: ✅ I would like to confirm the preferred ESP32 variant (ESP32-S3, ESP32-WROOM, etc.) and whether WiFi/BLE must operate simultaneously during continuous 16-channel streaming. ✅ I would like to confirm the required PCB layer stack-up and whether the final assembly requires Aisler DFM constraints or specific component packages. ✅ I would like to know if the firmware source from the existing OpenBCI platform is available for ESP32 adaptation and GUI protocol compatibility. Best, Yaroslav

@tetianam8

⭐⭐⭐⭐⭐ I've reviewed your requirements in detail, and this is much more than a PCB merge. The success of this project depends on maintaining the ADS1299 analog performance while integrating an ESP32, USB-C charging, MicroSD, and high-speed wireless communication without introducing RF noise into the acquisition path. I can develop the complete hardware in Altium, including synchronized dual ADS1299 architecture, low-noise multilayer PCB layout, optimized power distribution, USB-C charging/programming, and ESP32 firmware adapted for 16-channel streaming while preserving OpenBCI GUI compatibility. Proposed milestones: Hardware architecture and component selection Schematic and multilayer PCB layout ESP32 firmware adaptation and communication testing Manufacturing package, documentation, and design review Before starting, I'd like to confirm whether maintaining full OpenBCI packet compatibility is mandatory, and whether WiFi, BLE, or both should be supported simultaneously. Yes, I have experience with precision mixed-signal PCB design, high-speed SPI interfaces, and multilayer routing where analog integrity and digital/RF isolation are critical to reliable performance.

@sakshis576

As a seasoned professional proficient in Electronics and Embedded Systems, I hold ample experience and proficiency needed for this significant project. My forte lies in designing custom PCBs with an eye for efficiency and detail that meets the most stringent requirements. To-date, I've developed compact, multifunctional devices like yours that demand precise channel synchronization, extensive data handling capacity, and robust wireless transmission.

@abdurRafiqM

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@julianm260

With my extensive experience and proven track record of over 8 years, I am more than qualified and capable to handle your Custom 16-Channel EEG Board Design project. My in-depth knowledge in RF engineering, FPGA design, and embedded systems guarantees a perfect synchronization of the 'ADS1299' IPs via SPI, ensuring a robust performance across all your 16 channels. My adeptness in circuit design will also solve crucial aspects of your project like the low-noise layout/shielding necessary to ensure strict isolation of the ESP32's RF noise from the analog front-end which is vital for optimal processing of data with minimal interference. Delivering high-quality results within tight deadlines. Continuous research and professional development have also ensured that I'm up-to-date with the latest designs and innovations from industry-leading tools like Altium Designer – enabling me to provide you with comprehensive, well-documented deliverables that include full source files (Altium project) Manufacturing files (Gerber, BOM, Pick-and-Place) as required for your projects. Last but not least, my experience makes me the ideal fit for your project. I've successfully carried out similar projects from concept through design, simulation, validation, documentation, and final implementation ensuring absolute compliance with safety, reliability, and performance standards throughout. Together let's bring the vision for your prototype to life while maintaining strong communication thereby guaranteeing the perfect alignment of our end-goals!

@ahmaddar2970

This project is an exciting challenge, and my extensive experience with multi-layer PCB design and ADS1299 integration aligns perfectly. I have a proven track record of creating compact EEG prototypes, integrating Bluetooth/WiFi modules, and ensuring synchronization across ADCs. I understand the importance of noise reduction, component selection, and firmware adaptation to meet client specifications. I will ensure all stock components are sourced efficiently and deliver comprehensive source files, Gerber files, BOM, and assembly instructions. I am eager to collaborate to develop a robust, compact EEG board that meets all technical requirements and showcases innovative design. Looking forward to bringing this prototype to life with precision and quality.

@Aaleen110

I understand you need a custom 16-channel EEG board integrating OpenBCI Cyton and Daisy designs, featuring dual ADS1299IPAG ADCs daisy-chained via SPI with a shared external clock, and an ESP32 MCU for WiFi/BLE with strict RF noise isolation. I successfully integrated multiple SPI peripherals with synchronized clocking for a medical device prototype, achieving sub-microsecond timing accuracy. My approach will involve designing a single-layer PCB layout in KiCad. This will include routing the SPI bus for the two ADS1299IPAG chips, ensuring a common external clock source. The ESP32 will be placed on a separate section of the board with dedicated power filtering and shielding to minimize RF interference, connected to the ADCs via a dedicated communication interface. What is the desired form factor for the final PCB, and are there any specific connector requirements for the EEG electrodes? Ready to start as soon as you confirm scope.

@shenglin0617

Hi, I am a Chinese hardware engineer with proven ADS1299 experience. I have built multiple 8 and 16-channel EEG boards with daisy-chained ADS1299s, and can deliver your integrated Cyton+Daisy board at 50x50mm. Design Approach: 6-layer Altium PCB with split analog/digital ground planes. Two ADS1299IPAG share a 2.048MHz external clock for perfect sync. ESP32-WROOM placed opposite side from analog inputs with shield can option. Low-noise LDO and pi-filter for analog rails. USB-C for charging (MCP73831) and ESP32 programming. MicroSD on same edge. All parts from Mouser/Digi-Key for Aisler assembly. Firmware: ESP32 code extended from OpenBCI SDK, reading 216-bit daisy-chain frames. Full BLE/WiFi compatibility with OpenBCI GUI. Configurable 250-1000Hz. Deliverables: Altium project, Gerbers, BOM, PnP, and mixed-signal layout report. Previous designs under 1µVpp noise floor. Let's build this. Best Regards, ShengLin Gu.

@rvwebfreelancing

Hi there! I can design a custom multi-channel EEG board with low-noise analog front-end, PCB layout, and production-ready documentation. Careful analog/digital isolation, grounding, and patient-safety considerations are critical for reliable biopotential acquisition and signal integrity. I have experience with mixed-signal PCB design, schematics, multilayer layouts, and manufacturing deliverables for embedded electronics. ✅ How many EEG channels and which AFE/ADC (e.g., ADS1299) do you plan to use? ✅ Which PCB software and deliverables are required? ✅ Do you also need firmware development and prototype bring-up? Check portfolio: www.freelancer.com/u/rvwebfreelancing/mech Looking forward to collaborating with you. Best, Rahul

@bilalh585

With over 8+ years of experience in PCB design, embedded systems, and mixed-signal electronics, I have developed multi-layer boards for medical-grade sensors, high-speed interfaces, and low-noise analog front-ends. I have experience with Altium Designer, ESP32, ADS-series ADCs, LiPo power management, and RF-aware PCB layout, making me well-suited for this OpenBCI-based redesign. I can consolidate the Cyton and Daisy architectures into a compact 16-channel PCB featuring 2× ADS1299, synchronized SPI communication, an ESP32 for WiFi/BLE, USB-C programming and charging, a LiPo charging circuit, and a MicroSD interface. The layout will prioritize analog/RF isolation, clean grounding, power integrity, and manufacturability while ensuring compatibility with Aisler assembly and components available from Mouser/Digi-Key. Deliverables: Complete Altium project files Schematics & 4-layer PCB layout Gerbers, BOM & Pick-and-Place files ESP32 firmware adaptation for 16 channels OpenBCI GUI compatibility DFM/DRC verified design with revision support I would be happy to discuss the board stack-up, target dimensions, firmware architecture, and performance goals before starting. Best regards, Bilal

@Ryan15222

Hi, I'm very interested in your custom 16-channel EEG board project. I have extensive experience in mixed-signal PCB design, embedded systems, ESP32 development, precision analog circuits, and medical/biopotential signal acquisition. This project is well aligned with my expertise. I understand your goal is to consolidate the OpenBCI Cyton and Daisy designs into a compact, production-ready PCB while improving wireless connectivity and maintaining compatibility with the OpenBCI ecosystem. I can deliver: Complete Altium schematic and multi-layer PCB layout. Integration of 2× ADS1299 with a shared low-jitter clock and synchronized SPI interface. Low-noise analog layout with careful partitioning of the ESP32 RF section, analog front-end, and power domains. USB-C programming and LiPo charging circuit with battery-only operation. MicroSD integration (MSD-3-A) and optimized component placement within your 50 × 50 mm target. Component selection using parts available from Mouser and Digi-Key. Gerber, BOM, Pick & Place, assembly drawings, and complete manufacturing documentation. ESP32 firmware adaptation for 16-channel acquisition with Wi-Fi/BLE streaming while maintaining compatibility with the OpenBCI GUI.

@ahmadayaz

Utilizing expertise in mixed-signal routing and ADS1299, I can tailor the EEG board integrating OpenBCI Cyton and Daisy designs to ensure synchronization and performance. By implementing strict isolation for shielding RF noise, we can enhance reliability. Prioritizing low-noise layout techniques and component selection will strengthen EMI/EMC compliance. Let's build a scalable architecture to accommodate future enhancements and regulatory needs, ensuring durability and innovation.

@SidUSA

Hi, We are available to take this on and get your 16-channel EEG board design working perfectly. The main issue with combining complex designs like the OpenBCI Cyton and Daisy into a single PCB is ensuring robust signal integrity and effective isolation of the ESP32’s RF noise from the analog front-end. Are you planning to prioritize the 1000 Hz sampling target, and do you have a specific preference for the shielding enclosure design to mitigate potential noise interference? We recently completed a similar custom PCB project for a medical device startup that required integrating ADS1299 chips with ESP32 connectivity. We utilized a multi-layer board design with strict analog-digital separation and tailored the firmware to ensure seamless compatibility with existing GUI frameworks. We corrected their initial layout concerns to prevent signal crosstalk and ensured all components were sourced from Mouser for immediate assembly readiness. Our approach ensured stable data transmission and precise synchronization across all channels. We are eager to discuss the project further. Reach out to initiate a conversation! Best regards, Quantum Code Solutions

@ronalds04

Hello, I have 15+ years of experience in electronics design, embedded systems, and PCB layout, and I am a licensed professional engineer specializing in mixed-signal hardware for biomedical applications. Your project to combine the OpenBCI Cyton and Daisy into a compact, robust 16-channel EEG board is exactly in line with my expertise, especially with high-channel-count analog front-ends and EMI-sensitive designs. > I will deliver a unified Altium project merging Cyton and Daisy schematic/PCB with ESP32, dual ADS1299, and the requested peripherals. > I will ensure low-noise layout and shielding between the ESP32 and analog front-end, following best practices for RF isolation in small form factors. > I will select only in-stock, assembly-friendly components from Mouser/Digi-Key, complete with Gerber, BOM, and pick-and-place files for Aisler. > I will adapt and document ESP32 firmware for 16-channel acquisition and seamless integration with the OpenBCI GUI over WiFi/BLE. I recently completed a similar board integrating two ADS1299s with wireless data streaming and OpenBCI compatibility, which gives me hands-on insight into your requirements. Could you confirm if you have any specific preferences for the power management ICs or if you’d like me to recommend proven solutions? Please contact me. Best Regards, Ronald

@davidp155

Drawing on my 15+ years of electrical engineering and design experience, I am confident in my ability to support you throughout your custom EEG board project. Over my career, I've demonstrated a strong understanding not only of engineering design but of the construction and building systems on which they're built. This background, I believe, gives me a unique perspective from which to approach your project. With meticulous precision – honed through drafting MEP layouts and preparing structural drawings – I will create an Altium project that aligns with your specifications. In addition to meeting technical aspects, such as ADC selection for perfect synchronization and signal integrity, I understand the importance of practical considerations in design. For example, I'll ensure your ESP32's RF noise is strictly isolated to avoid interference with analog front-end circuits. Moreover, as a photographer and videographer, I possess an eye for visual impact that will be invaluable for creating compact-sized designs that fit your form factor requirements without compromising the intuitive user experience. Bringing everything full circle, I'm adept in software compatibility and can efficiently re-adapt your ESP32 firmware to render full compatibility with the OpenBCI GUI while handling the increased data influx from the 16 channels. So, if you want an engineer who combines technical acumen with artistic creativity –one who can provide both comprehensive design uptime and quality project documentation – look no further. Let's bring your Prototype into sharp focus!