家用烟雾探测器开发板
光电烟雾探测器由一个红外光电二极管(发射器)和一个光电晶体管(接收器/探测器)组成,安装在所谓的“小白盒”内。 空气在盒子内流动,而空气中可能含有来自附近(早期)明火的烟雾,等等。
”小白盒“的结构可防止(日)光进入盒子,以免干扰测量。 由于发射器和探测器都位于 ~120 至 150...
The RAA239101 is a low-power Analog Front-End (AFE) IC; combined with a microcontroller, photoelectric emitter/detector(s), horn, and minimal external components, it forms a complete smoke detector.
The IC operates from a 3V to 5V or 9V battery and has an LDO to provide power to a microcontroller. The battery-check feature can be used to signal an alarm when the battery is low.
The RAA239101 provides a driver that can switch between two LEDs to pulse the smoke detection LED emitters with a DAC adjustable current. Two photodiode receiver channels with programmable gain amplification using an ADC allow the detection of smoke by sensing the LED light scattered off of smoke in a detection chamber.
光电烟雾探测器由一个红外光电二极管(发射器)和一个光电晶体管(接收器/探测器)组成,安装在所谓的“小白盒”内。 空气在盒子内流动,而空气中可能含有来自附近(早期)明火的烟雾,等等。
”小白盒“的结构可防止(日)光进入盒子,以免干扰测量。 由于发射器和探测器都位于 ~120 至 150...
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