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1. Description:
When the IN port is low, the triode will turn-on. Then the buzzer ring, and small red lamp lights.
It can be used as the external module of many kinds of circuits, such as MCU.
2. Feature:
Audible and visual alarm. Active and passive can be available.
P.s.
Active buzzer: when the power is on, the input triggering signal is low, the buzzer can sound (continuous sound)
Passive buzzer: only the triggering signal must be a certain frequency, can buzzer
Sound. It generally use the MCU program.
3. Parameter:
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