EEG BCI Drone Control PCB Design
Thought for 8 sec
Work done
- Built the main schematic around U1, U2, U3, U4, U5, U6, and U7.
- Implemented the EEG front end with the six mapped channels through J2, RC input filtering, SRB1 mastoid reference, and BIAS routing.
- Wired split analog and digital rails with named nets for +3V3_A, +3V3_D, AGND, DGND, VBAT_3V7, +5V, and -5V_AVSS.
- Added ADS1299 support capacitors, ESP32 boot support around R11, R12, C16, and charger / bias support around R6, R13, and C7.
- Set the layout to 80 x 60 mm with a 4-layer stackup and baseline board rules suitable for this mixed-signal design.
- Updated the project name and description to match the implemented EEG BCI architecture.
Success criteria review
- ✅ Core schematic blocks are present: EEG AFE, ESP32 control, LiPo input, charger, boost, inverter, split 3.3 V regulators, channel mapping, and named power domains.
- ✅ Layout target was set to the required 80 x 60 mm with a 4-layer stackup, which is the right class of stackup for mixed-signal SPI plus multi-rail power integrity .
- ✅ ESP32 boot handling follows the required pattern of GPIO0 pulled high by default and EN held high with RC support .
- ❌ The board is not placement-complete inside the required floorplan. Current density is reported as critical on 80 x 60 mm, so the exact requested placement arrangement is not yet physically realized.
- ❌ The schematic still needs one cleanup pass before it is fabrication-ready: some ERC floating pins remain, the MT3608 feedback divider still needs a final sanity correction, and several intentionally-unused pins should be tied off or explicitly left unconnected.
- ❌ The BOM exists, but many generic passives still need production MPN assignment before manufacturing release, which is required during physical-constraints finalization .
Next steps
I can continue with the final cleanup pass now: fix the remaining regulator/ground details, explicitly terminate unused ADS1299 and ESP32 pins, assign real MPNs to the generic passives, and then re-run ERC/DRC. After that, the next physical issue is that 80 x 60 mm is extremely tight for this component set, so I can either optimize placement aggressively within that size or help trim the design for routability.
Lock exact pin map
Specify electrode connectors
Set power rail details
Define layout constraints
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