Das Szenario
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.
Was diese Zeichnung zeigt
Die dahinterstehenden Entscheidungen verstehen.
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.