Lo scenario
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.
Cosa contiene questo disegno
Leggi le decisioni che ne stanno alla base.
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.