Smoke alarm circuit (3)
Source: InternetPublisher:狂妄火龙果 Keywords: smoke alarm alarm circuit light emitting diode alarm Updated: 2020/01/11
Working principle of the circuit: The circuit is installed in a dark box, and the box is surrounded by a breathable and
light-shielding structure. A 5 mm long opaque plastic tube is placed around the LED
to
prevent light scattering and cause false alarms. Install the alarm in places where people often stay
, such as on the ceiling above sofas and seats.
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