PCB Design for Drowsiness Detection
Thought for 15 sec
- Set Detailed Design Notes to "ECG driver drowsiness detector built around AD8232 front end, three-electrode RA/LA/RL interface, low-noise 3.3V analog rail ..."
- Set Component Summary to "IC1 AD8232 ECG front end, U1 dual precision op amp for notch and output conditioning, U2 3.3V LDO, J1 3-pin ECG electrode con..."
Thought
Work done
- Documented the project architecture and saved the ECG signal-chain design intent, including the 50 Hz notch requirement and low-noise analog strategy.
- Added and configured the core schematic parts: IC1, U1, U2, J1, plus the passive network R1 through R11 and C1 through C10.
- Wired the ECG front end with RA/LA/RL electrode connections, a regulated 3.3 V analog rail, midrail reference generation, AD8232 support connections, a 50 Hz twin-T notch network, and a conditioned ECG output at C4/R7.
- Set layout constraints for a 70 mm x 50 mm rectangular 4-layer layout, applied conservative trace/keep-out rules, annotated nets, grouped the design for placement, and prepared initial placement flow with the connector J1 locked.
- Updated project-level documentation with detailed design notes and a component summary.
Success criteria review
- ✅ The schematic now contains a connected IC1 ECG front end, electrode interface via J1, supporting regulation through U2, and a 50 Hz notch/filtering network around U1.
- ✅ The layout has been initialized with low-noise-oriented constraints: 4-layer stackup, board outline, analog-friendly trace/clearance rules, and staged placement setup.
- ✅ Project description and design documentation were updated to reflect the ECG drowsiness detection purpose and signal-conditioning requirements.
- ❌ The PCB is not yet fully routed: DRC still reports airwires, which require the human to run Auto-Layout or complete routing manually.
