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KiCad 2층 PCB / SFH7070 ×2·OPA2333 ×3·STM32F411

69 modules · 83 nets · 602 tracks · Gerber·drill

보드·회로 사진 · 설계 파일 · STM32 학습

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STM32F411 PPG PCB front view

산출물: KiCad 회로도·PCB·Gerber·drill

Project summary

I designed a two-layer PPG PCB integrating two SFH7070 optical sensors, three dual OPA2333 zero-drift amplifiers, and an STM32F411RETx. The project connects the analog front end to ADC inputs A0/A1 and carries the design through KiCad routing, ground copper, Gerber, and drill outputs.

System architecture

SFH7070 ×2 → OPA2333 amplification/filter stages → STM32F411 ADC A0/A1 → digital processing/UART

5 V input → SPX3819 3.3 V rail → analog/digital circuits

Design activities

• Split the schematic into STM and Analog hierarchical sheets.
• Built STM32F411 power, 8-MHz/32.768-kHz clock, SWD, and UART circuits.
• Placed analog inputs, MCU, clocks, power, and connectors on an approximately 80.6 × 52.2 mm board.
• Used bottom-side ground copper to support signal return paths.
• Generated front/back copper, mask, paste, silkscreen, edge, PTH/NPTH drill, and Gerber job files.

Design summary

• 2 layers
• 69 modules
• 83 nets