# Safe CO Alarm ## Description 纽扣电池供电的小型一氧化碳报警器，CO > 10 ppm 时通过蜂鸣器、振动马达和红色 LED 报警，不对人体施加电流。 ## Project Details - **Owner:** qq5 - **Created:** 5/16/2026 - **Last Updated:** 5/16/2026 - **Visibility:** Public ## Key Components ### BT1 — [CR2032-BS-6-1](https://www.flux.ai/jecstronic/cr2032-bs-6-1~ffg.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.snapeda.com/parts/CR2032-BS-6-1/Shenzhen%20Q&J%20Electronics%20Co.%20Ltd/datasheet/ - Role Details: 3 V CR2032 source; alert outputs must be pulsed due coin-cell current limit - Role: Battery Holder - Manufacturer Part Number: CR2032-BS-6-1 - Part Type: Battery - Manufacturer Name: Q&J **Pins:** - Negative [pin N] - Positive [pin P] ### BZ1 — [CSS-0575A-SMT-TR](https://www.flux.ai/adrian95/css-0575a-smt-tr~i8r.md) - Manufacturer Part Number: CSS-0575A-SMT-TR - Datasheet URL: https://www.sameskydevices.com/product/resource/digikeypdf/css-0575a-smt-tr.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Same Sky - Part Type: Buzzer **Pins:** - - [pin 2] - + [pin 1] - NC [pin 3] ### D1 — [1N4148WS-7-F](https://www.flux.ai/adrian95/1n4148ws-7-f~jvm.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 1N4148WS-7-F - Manufacturer Name: Diodes Incorporated - Part Type: Diode - Datasheet URL: https://www.diodes.com/assets/Datasheets/1N4148WS_BAV16WS.pdf **Pins:** - A [pin 2] - K [pin 1] ### LED1 — [KT-0603R](https://www.flux.ai/adrian95/kt-0603r~7c.md) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_1810231112_Hubei-KENTO-Elec-KT-0603R_C2286.pdf - Manufacturer Part Number: KT-0603R - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Hubei KENTO Elec **Pins:** - A [pin 2] - K [pin 1] ### M1 — [Z3OC1T8219731](https://www.flux.ai/lcsc/z3oc1t8219731~1jvo.md) - JLCPCB Part Class: Extended Part - LCSC Part Number: C2894731 - Voltage Rating: 2.7V - Manufacturer Part Number: Z3OC1T8219731 - Operating Temperature: -20~+70℃ - Rated Speed: 14000±2500rpm - Current Rating: 85mA - Part Type: Micro Motor & Motor - Manufacturer Name: KOTL(金龙机电) - Package or Case Code: VIBRATING-MOTOR-SMD_3P-C9900001680 **Pins:** - - [pin 2] - + [pin 1] - EP [pin 3] ### Q1 — [BSS138LT3G](https://www.flux.ai/openpartlist/bss138lt3g~d7.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138lt1-d.pdf - Part Type: Transistor - Manufacturer Name: onsemi - Manufacturer Part Number: BSS138LT3G **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q2 — [BSS138LT3G](https://www.flux.ai/openpartlist/bss138lt3g~d7.md) - Part Type: Transistor - Manufacturer Part Number: BSS138LT3G - Manufacturer Name: onsemi - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138lt1-d.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### SEN1 — [ES1-CO-1000-01](https://www.flux.ai/lcsc/es1-co-1000-01~3lm.md) - Package or Case Code: SENSOR-TH_ES1-CO-1000-01 - Manufacturer Part Number: ES1-CO-1000-01 - Product Info Url: https://lcsc.com/product-detail/Gas-Sensors_EC-Sense-ES1-CO-1000-01_C528674.html - Manufacturer Name: EC Sense - LCSC Part Number: C528674 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2006122120_EC-Sense-ES1-CO-1000-01_C528674.pdf - Part Type: Gas Sensors **Pins:** - C [pin 1] - R [pin 3] - S [pin 2] ### U1 — [ATTINY402-SSNR](https://www.flux.ai/adrian95/attiny402-ssnr~r3x.md) - Role Details: Samples LMP91000 VOUT, configures I2C AFE, drives safe alarm outputs - Manufacturer Part Number: ATTINY402-SSNR - Role: MCU - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: http://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny202-402-AVR-MCU-with-Core-Independent-Peripherals_and-picoPower-40001969A.pdf - Part Type: Integrated Circuit - Manufacturer Name: Microchip Technology **Pins:** - GND [pin 8] - PA0/RESET/UPDI [pin 6] - PA1 [pin 4] - PA2 [pin 5] - PA3/EXTCLK [pin 7] - PA6 [pin 2] - PA7 [pin 3] - VDD [pin 1] ### U2 — [LMP91000SDE/NOPB](https://www.flux.ai/adrian95/lmp91000sdenopb~d5k.md) - Role: Gas Sensor AFE - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 3-lead electrochemical CO sensor interface; <10 uA average AFE - Part Type: Integrated Circuit - Manufacturer Part Number: LMP91000SDE/NOPB - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/symlink/lmp91000.pdf **Pins:** - AGND [pin 7] - C1 [pin 10] - C2 [pin 9] - CE [pin 14] - DGND [pin 1] - EP [pin 15] - MENB [pin 2] - NC [pin 5] - RE [pin 13] - SCL [pin 3] - SDA [pin 4] - VDD [pin 6] - VOUT [pin 8] - VREF [pin 11] - WE [pin 12] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/qq5/safe-co-alarm~s0](https://www.flux.ai/qq5/safe-co-alarm~s0).* --- *Generated from [https://www.flux.ai/qq5/safe-co-alarm~s0](https://www.flux.ai/qq5/safe-co-alarm~s0)*