Play a melody on a buzzer
Pitches and lengths live in arrays and are played in order.
buzzer
Actuator
Passive buzzer (THT)
buzzerPWM
Why this support circuit is added
Passive buzzer driven by tone(). A series resistor keeps it inside the MCU pin limit (20 mA); for more volume drive it through a transistor (see load_mosfet).
Grounded in the catalog and golden patterns (real open-source circuits). Every auto-inserted part comes with a reason.
Support circuit added automatically1
Using this part in a project adds the circuit below, each element with its reason.
Series resistor
+ → MCU
Limits MCU pin current.
InterfacePWM
- Catalog id
- buzzer
- Category
- Actuator
- Protocol
- PWM
- Logic level
- Unrestricted (uses the board rail)
Firmware detection0
No library reveals it — add it from the module checklist in your project.
Examples using this part
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Turn a knob into a pitch
Maps the A0 reading straight onto an audible frequency.
buzzerpot
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A different note per key
Reads several inputs and sounds the note belonging to whichever is pressed.
buzzerpot
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Sound several buzzers in turn
tone() drives one pin at a time; noTone() frees it for the next.
buzzer
Parking sensor
An ultrasonic range finder beeps at shorter intervals as something gets closer, and lights an LED inside 30 cm.
buzzerhc_sr04led
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A doorbell that rings when pressed
Pressing the button turns the NeoPixel ring blue and plays two tones.
buttonbuzzerws2812b