Piezo Sound Buzzer Parameter:
| Model No | NORS14A40P7.6V12 |
| Rated Voltage | 12VDC |
| Operating Voltage | Max 25VDC |
| Rated Current | 7mA |
| Min. Sound Pressure Level | 85dB at 1kHz/10cm |
| Rated Frequency | 4±0.5KHz |
| Operating Temperature | -20~+60℃ |
| Storage Temperature | -30~+70℃ |
| Tone | Single |
| Weight | 0.5g |
dimension of piezo buzzerWorking principle of active buzzer
Active buzzer is based on the principle of piezoelectric effect to produce sound. Piezoelectric materials, generally all kinds of piezoelectric ceramics are common. The special feature of this material is that when a voltage is applied to the piezoelectric material, it will be mechanically deformed with changes in voltage and frequency.
On the other hand, when piezoelectric ceramics are vibrated, charges are generated.
That is to say, this material can convert mechanical deformation and electric charge into each other. The vibrating piece in the piezoelectric buzzer is a kind of piezoelectric ceramic. As mentioned above, in order to make it vibrate, in addition to the piezoelectric ceramic itself, a voltage with an appropriate size and frequency change is required to act on the piezoelectric ceramic.
There is a multivibrator inside the active buzzer, which can generate a voltage signal of 1.5-2.5kHZ. Only the active buzzer can sound.
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