Multi-Channel EEG Biosignal Acquisition Board

16-channel EEG acquisition board built on two ADS1299 front ends with a Microchip PIC microcontroller and onboard Bluetooth, directly compatible with the OpenBCI GUI. Effectively a fusion of OpenBCI's Cyton and Daisy boards on a single PCB.

Medical Devices2x ADS1299 · PIC · Bluetooth

Multi-Channel EEG Biosignal Acquisition Board PCB design by CircuitNexa

Project overview

Engineering approach

Medical and biosignal electronics carry tight requirements around noise floor, shielding, and repeatable measurement accuracy. On this board, that translates into a component set built around 2x ADS1299, PIC and Bluetooth, with layout and stack-up decisions driven by signal integrity, low-noise analog front-end layout, and careful grounding to keep biosignal readings clean.

Technical specification

2x ADS1299 · PIC · Bluetooth

Hardware photos

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16-channel EEG biosignal acquisition PCB with ADS1299 analog front ends, electrode input connectors on both edges, a Bluetooth enable switch and programming headers — The bare PCB, showing the ADS1299 analog front ends, an electrode input connector on each side, the Bluetooth enable switch, and the power switch and headers.

Two 16-channel EEG biosignal acquisition boards on an ESD mat during bring-up, next to a soldering and rework station — Boards on the bench during bring-up, next to the rework station.

Engineering focus

This portfolio project demonstrates CircuitNexa's electronics engineering and PCB design work in the medical devices space. The design shown here is part of a broader portfolio spanning schematic capture, PCB layout, embedded firmware, prototyping, and support through to manufacturing.

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