情境
Designing a simple smoke detector alarm circuit for a residential application. When smoke is detected, the sensor resistance drops, causing the comparator to output high and light the LED.
這張圖裡有什麼
看懂背後的決策。
01
Using a comparator with a pull-up resistor to drive the LED
02
Adjusting sensitivity via the reference voltage divider
Suitable for basic smoke alarm systems where a visual indicator is needed instead of or in addition to an audible one.