一氧化碳报警装置设计
Worked for 15 mins 17 sec
已完成安全版 CO 报警器原理图：CO 传感器 + LMP91000 AFE + ATtiny402 + 蜂鸣器/振动/红 LED，电击输出已完全替换为安全提示输出。电气检查无 ERROR/WARNING；制造检查还提示通用电阻/电容未指定具体 MPN，量产前需要选定具体料号。
项目文件已创建：
下一步是布局前确认：这个 CR2032 版本只能做脉冲式蜂鸣/振动；如果要更响或更强振动，建议改 AAA 或小 LiPo。
Use CR2032 and optimize for low-power pulsed alerts.
Thought for 14 sec
明白，我会保留 CR2032，并把设计明确优化为低功耗、交替脉冲报警：更新功耗预算/固件说明，检查是否需要改元件属性，然后复查电气错误。
Worked for 1 min 57 sec
已按你的要求改为 CR2032 固定方案，并优化为低功耗脉冲报警：
- 保留 CR2032 直供 VBAT，无稳压器，避免静态损耗。
- 已更新 Power Budget：明确禁止蜂鸣器和振动马达同时工作，目标报警平均电流约 10–11 mA，监测平均电流目标 <100 µA。
- 已更新 Firmware Starter — ATTINY402-SSNR：蜂鸣器限制为 80 ms / 1 s，振动马达限制为 50 ms / 5 s，LED 低占空比闪烁。
- 我已检查关键连接：CR2032、220 µF bulk 电容、蜂鸣器、振动马达、MOSFET 驱动和 LMP91000/ATtiny402 电源连接都符合这个低功耗脉冲策略。
- 最近一次电气检查无 ERROR/WARNING。
剩余事项：我还没来得及把关键元件的 Role Details 全部改成“CR2032 pulsed alert”说明，也没重新跑最终的完整制造检查；目前已知通用电阻/电容仍会提示未指定具体 MPN，量产前需要选具体料号。
更新元件说明
最终 ERC/DRC
选择具体 MPN
检查 BOM 成本
保存设计说明
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Project Specification
Safe Design Scope
Design a compact, low-cost carbon monoxide (CO) alarm. The original harmful output concept is replaced with safe feedback only: buzzer, vibration motor, and red LED. The design must not apply electrical current to a person.
Functional Requirements
- Detect carbon monoxide concentration.
- Trigger alarm when CO concentration is greater than 10 ppm for a short debounce interval.
- Alarm outputs: audible buzzer, vibration motor, red LED.
- Power source: coin cell preferred; CR2032 assumed for compactness.
- Small, low-cost PCB suitable for portable use.
Assumptions
- Use an electrochemical CO sensor because heated MOS CO sensors are unsuitable for coin-cell operation.
- Use a low-power MCU with ADC to sample the sensor front-end.
- Alarm outputs are pulsed/duty-cycled to reduce peak load on the coin cell.
- This is a prototype design; final life-safety certification requires calibrated gas testing and applicable standards review.
Architecture
- CR2032 battery and power switch.
- Low-power electrochemical CO sensor and analog measurement interface.
- Low-power MCU with ADC and firmware threshold logic.
- Safe alert outputs: LED, buzzer, vibration motor driver.
- Programming/debug pads for firmware bring-up.
Safety Notes
- No user-contact shock/electrical stimulation output is included.
- Alarm notification is non-contact and low-voltage only.
- CO alarm products intended for life-safety use require validation, calibration, enclosure airflow testing, and certification.
Safe Design Scope
Functional Requirements
Assumptions
Architecture
Safety Notes
