Buzzers: Difference between revisions
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(Created page with "<!-- ===Buzzers=== '''Piezo buzzer''' When fed AC (e.g. PWM) they will vibrate, due to the piezoelectric effect on the disk. There are some piezos with a third wire, which...") |
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When fed AC (e.g. PWM) they will vibrate, due to the piezoelectric effect on the disk. | When fed AC (e.g. PWM) they will vibrate, due to the piezoelectric effect on the disk. | ||
There are some piezos with a third wire, which make it easier to create an analog resonator. | There are some piezos with a third wire. The third is a feedback electrode, which make it easier to create an analog resonator. | ||
If a piezo buzzer takes DC, that means there's a basic oscillator circuit in it. | If a piezo buzzer takes DC, that means there's a basic oscillator circuit in it. | ||
Piezos are relatively loud for little current, making them handy for alarms. | Piezos are relatively loud for little current, making them handy for alarms. | ||