Description
- Brand Name: EMDSXGO
- Accessory Type: Extension Board
- Battery Included: No
- Origin: Mainland China
- High-concerned chemical: None
- Compatible With: new
pin definition
Now many people are not very clear about the concept of active buzzer and passive buzzer, here is a brief introduction, I hope it will be helpful for everyone to use in the future.
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Note that "source" here does not refer to a power source. It refers to the source of vibration.
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The features of passive buzzer are:
1 There is no oscillation source inside the passive, so if you use a DC signal, you cannot make it chirp. It must be driven with a square wave of 2K~5K
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2 The sound frequency is controllable, which can make the effect of "Doremifa Solassie".
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3 In some special cases, a control port can be multiplexed with the LED
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The features of the active buzzer are:
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1 The active buzzer has an internal oscillation source, so it will beep as soon as it is powered on.
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2 The program control is convenient, a single high and low level of the microcontroller can make it sound, but the passive buzzer cannot.
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Each set weighs about 6g
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A module description
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2 Working voltage 3.3V
6 With fixing bolt holes for easy installation
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Two module interface description (3-wire system)
1 VCC external 3.3V
2 GND External GND
3 I/O External MCU IO port
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Three delivery list
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1 piece of passive buzzer module (test passed)
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