Custom 16-Channel EEG Board Design -- 2

@MuhammadUzair16

Hi I am an embedded systems engineer with over 16 years of experience in mixed-signal PCB design, low-noise analog front ends, ESP32 firmware, and full consumer-grade product design from concept to production. I can help you turn the Cyton/Daisy architecture into one compact 16-channel EEG board using two synchronized ADS1299 devices with a shared clock, clean analog/digital partitioning, controlled SPI routing, RF containment around the ESP32, LiPo charging over USB-C, MicroSD placement, and assembly-ready Altium outputs. I have worked on multi-layer biomedical/data-acquisition boards where noise floor, grounding, shielding, ADC timing, and wireless buffering mattered more than simply connecting the schematic. Related past projects cannot be shared publicly, but I can show suitable examples privately if required. My approach would be to first lock the architecture and components available from Mouser/Digi-Key, then create the schematic/PCB with manufacturable constraints for Aisler, followed by firmware adaptation for 16-channel streaming and OpenBCI GUI compatibility. A quick question: do you prefer an ESP32 module for RF certification and easier assembly, or a bare ESP32 design for tighter size control? Please contact me to discuss details.

@mairajali11

As an experienced Electrical/Electronics Engineer and Professional PCB Designer, I have successfully delivered numerous projects similar to yours over the past 8 years. I'm well-versed in using industry-leading software like Altium, Eagle, and KiCAD, which come in handy for designing high-quality circuit boards such as the one you require. In fact, my proficiency with these tools recently earned me a Professional EasyEDA certification, a copy of which you can find in my portfolio. I've worked extensively with the ADS1299 and multi-layer mixed-signal routing before. These experiences, in conjunction with my profound understanding of microcontrollers like Arduino and ESP32 (beneficial for the implementation of WiFi/BLE), make me an ideal candidate for your project. Apart from design skills, I have comprehensive knowledge of multiple CAD software like Fusion360 that will enable me to assist in housing design if necessary. Additionally, I'm familiar with MSD-3-A (MicroSD slot) and USB-C integration, and I understand how critical low-noise layout/shielding and strict isolation are for robust signal acquisition in your prototype. Hence, I'm not just equipped to meet your project's technical requirements but also considerate of your need to stay within your chosen suppliers' range via Aisler.net. Choose me, and we'll turn your ideas into an exceptional reality promptly while staying within budget!

@engrusmanfaiz

Hi, Your project’s biggest challenge is achieving low-noise 16-channel EEG acquisition by combining dual ADS1299 ADCs with an ESP32 while maintaining precise synchronization and isolating RF interference from the analog front-end. With 12+ years of experience in mixed-signal PCB design, ESP32, STM32, RF layout, and high-speed SPI systems, I can confidently deliver a compact, production-ready Altium design optimized for medical-grade signal integrity. Related Projects: * Designed a 6-layer biomedical monitoring PCB with low-noise analog front-end, battery management, and ESP32 wireless connectivity. * Developed an ESP32-based wearable health monitoring system with precision sensor acquisition, LiPo charging, USB-C, and BLE/Wi-Fi communication. * Completed several 4/6-layer mixed-signal PCBs featuring RF isolation, USB, SPI, SD card interfaces, and precision analog routing for industrial and medical applications. I will deliver complete Altium source files, Gerbers, BOM, Pick-and-Place files, firmware adaptation support, and manufacturing-ready documentation using components available from Mouser/Digi-Key. Regards, Engr. Muhammad Usman PCB Pro Expert

@leonidye

Hi, I have extensive experience designing mixed-signal embedded hardware, including high-resolution ADC systems, ESP32-based wireless devices, multi-layer PCB layouts, and low-noise analog front ends. Your 16-channel EEG project is well within my expertise, and I can consolidate the OpenBCI Cyton and Daisy architecture into a compact, production-ready PCB while maintaining signal integrity and OpenBCI GUI compatibility. I will implement dual ADS1299 devices with a shared precision clock for synchronized sampling, carefully isolate the ESP32 RF section from the analog front end using proper grounding, partitioning, and layout techniques, and integrate USB-C programming, LiPo charging, MicroSD storage, and WiFi/BLE communication. The design will be optimized for reliable operation at 250 SPS while supporting higher sampling rates through efficient SPI, DMA buffering, and firmware optimization. All components will be selected from Mouser or Digi-Key for seamless Aisler assembly. Deliverables include complete Altium source files, schematics, PCB layout, Gerbers, BOM, Pick-and-Place files, firmware updates, and design documentation. I provide regular progress updates, fast communication, and thorough design verification before release. I would be happy to discuss the architecture and development plan in detail before we begin. Regards,

@julianm260

Drawing from my extensive experience in electrical engineering and PCB layout, I’m confident that I am the ideal choice to create your custom 16-channel EEG board. Over the years, I have honed my skills in RF engineering, embedded systems, and power electronics design - all crucial aspects for this project. Additionally, I’ve successfully worked on projects incorporating similar protocols and interconnections as requested in your design, such as coding in C/C++, which is essential for adapting the ESP32 firmware to handle 16 channels. Not only do I have an intimate knowledge of the ADS1299 for analog acquisition while maintaining solid speeds but also experience with mixed signal routing - an area you specifically highlighted. This expertise, combined with my familiarity with the OpenBCI GUI - which is crucial for ensuring full compatibility of your prototype with existing software - allows me to bring a comprehensive approach to your project. In conclusion, hiring me means entrusting your project to someone with an impeccable track record of delivering robust hardware solutions parallelled with meticulous attention to detail. I understand the value of timely delivery without compromising on quality and consider it pivotal that we're aligned on mutual expectations throughout the project. Let's collaborate on assembling a compact-sized prototype that surpasses all technical requirements while maintaining a stringent budget by handpicking components from Mouser or Digi-Key as you stated. I am truly excited about the potential of this project and would bring unwavering commitment and focused dedication to its completion.

@Aaleen110

I understand you need a custom 16-channel EEG board integrating OpenBCI Cyton and Daisy designs, specifically focusing on a daisy-chained ADS1299IPAG setup sharing an external clock and replacing the RFD22301 with an ESP32, while ensuring strict RF noise isolation. I've successfully designed and delivered complex multi-channel bio-sensing PCBs with similar SPI-based ADC configurations and integrated wireless MCUs, achieving sub-microvolt noise floors in challenging environments. My approach will involve a two-layer PCB layout using Altium Designer, meticulously routing the SPI bus for the dual ADS1299IPAGs to ensure precise synchronization from a shared clock source. The ESP32 will be strategically placed and shielded, utilizing dedicated ground planes and ferrite beads on its power supply to minimize RF interference with the sensitive analog front-end. The final deliverable will be a gerber file package ready for fabrication, along with a comprehensive BOM. How will the external clock signal be distributed to both ADS1299 chips to guarantee phase coherence? Ready to start as soon as you confirm scope.

@ahmaddar2970

This project requires expertise in PCB design, wireless communications, and analog/mixed-signal routing. I have extensive experience with ADS1299, ESP32, and designing compact multi-layer PCBs in adherence to technical specifications. My previous work includes developing EEG prototypes and wireless sensor boards, ensuring high data integrity and signal isolation. I will deliver comprehensive source files, detailed manufacturing documents, and high-quality prototypes. Your project's focus on reliable, synchronized multi-channel EEG data collection aligns perfectly with my skills. I'm confident I can meet your tight form factor and performance needs while ensuring robust wireless data handling and RF noise management. Looking forward to discussing your precise design needs. Could you share more about the application's specific use cases to tailor the PCB design accordingly?

@caodx

Hello, I have solid experience designing ESP32- and STM32-based embedded systems, mixed-signal PCBs, battery-powered devices, and custom firmware. Your 16-channel EEG project is technically challenging, but it aligns well with my hardware and firmware background. I understand the importance of synchronizing two ADS1299 devices with a shared external clock, maintaining low-noise analog performance, and isolating the ESP32 RF section from the analog front-end through proper PCB partitioning, grounding, power filtering, and multi-layer routing. I can redesign the OpenBCI Cyton and Daisy into a compact single PCB, integrate USB-C programming, LiPo charging, and a MicroSD slot while selecting components available from Mouser or Digi-Key for Aisler assembly. On the firmware side, I can adapt the ESP32 to acquire all 16 channels, implement efficient SPI data handling, buffering, WiFi/BLE transmission, and maintain compatibility with the OpenBCI GUI. I will provide complete Altium source files, Gerbers, BOM, Pick-and-Place files, firmware source code, and support during prototype testing and debugging. I look forward to discussing your design requirements and helping bring this prototype into a reliable production-ready device.

@ahmadayaz

I propose to integrate OpenBCI Cyton and Daisy designs for a synchronized 16-channel EEG board, leveraging my expertise in PCB development. Using ADS1299 and ESP32 for enhanced capabilities, I will ensure optimal RF noise isolation and scalability up to 1000 Hz sampling rate. The design will follow industry-best practices for reliability and ease of assembly, with tailored firmware compatible with OpenBCI GUI. Let's collaborate to create a precise and innovative solution for your project.

@mundadiya

With experience in PCB design and EEG systems, I understand the need to merge OpenBCI Cyton and Daisy designs for a custom 16-channel EEG board. I have successfully integrated ADS1299IPAG ADCs and ESP32 MCUs while ensuring noise isolation and robust data transmission. How critical is the form factor for the final prototype's usability? Regards, mundadiya

@trm66614

Hello! I'm excited about the chance to create a custom 16-channel EEG board that truly embodies innovation and performance. With my background in designing and integrating complex PCBs, including experience with the ADS1299, I am well-prepared to tackle the challenges laid out in your project. The combination of the OpenBCI Cyton and Daisy designs is a thrilling endeavor, and I assure you that the seamless integration of ESP32 for WiFi/BLE, while maintaining strict low-noise layouts, will be a top priority. I understand how crucial it is to have a robust data transmission set-up for 16 channels, pushing the capabilities to up to 1000 Hz. I’ll ensure that everything from the schematic to the layout will adhere to your requirements, focusing on compact design without compromising quality or functionality. The deliverables will include comprehensive source files, manufacturing files, and rigorous testing protocols to ensure everything works flawlessly. Let’s build something extraordinary together! If your EEG board were a superhero, what powers should it have?

@richard1002

Hi, I see you’re looking to combine the Cyton and Daisy OpenBCI designs into a single 16-channel EEG board with an ESP32 and tight constraints on noise and size. I’m a licensed professional engineer with 20+ years of experience designing mixed-signal boards, embedded systems, and medical-grade instrumentation. I’ve worked with ADS1299, multi-channel EEG/EMG projects, and have handled compact, battery-powered designs with wireless data and strict analog/RF isolation. - Schematic capture and PCB layout merging Cyton and Daisy features into one board - Selection of all components from Mouser or Digi-Key, keeping Aisler assembly in mind - Multi-layer board routing for 16 EEG channels, with attention to analog/RF separation and form factor - ESP32 firmware for 16-channel streaming, WiFi/BLE data, and OpenBCI GUI compatibility - Complete manufacturing package: Altium files, Gerbers, BOM, pick-and-place, and documentation I recently finished a similar neuro-signal board (8-channel, ADS1299, ESP32) for research use. Could you clarify if simultaneous WiFi and BLE data streaming is required, or just one at a time? If you select me, I will satisfy you. Best Regards, Richard

@elijahhmonreal

Hello, I have reviewed your posting and understand that you are looking for an experienced electrical engineer to design a compact 16-channel EEG PCB by integrating the OpenBCI Cyton and Daisy architectures with ADS1299-based mixed-signal acquisition, ESP32 wireless communication, and battery management. I am an electrical engineer with extensive experience in custom PCB design, embedded systems, and low-noise mixed-signal hardware development. My expertise includes ADS1299 ADC integration, SPI-based data acquisition, multilayer PCB layout, RF noise isolation, power management, and ESP32 firmware development. I can help you create a production-ready design with synchronized ADS1299 devices, optimized analog/digital separation, proper grounding and shielding strategies, robust ESP32 data buffering for 16-channel high-speed sampling, and OpenBCI GUI compatibility. I will provide complete Altium source files, Gerbers, BOM, pick-and-place files, and firmware support using components available from Digi-Key/Mouser. I have worked on similar biomedical sensing, IoT, and embedded hardware projects involving precision analog acquisition and wireless communication. I would be happy to share relevant examples and discuss your prototype requirements. Please let me know if my profile interests you; we can schedule a time to discuss. Thank you, Elijah M.