The Buzzer Active 5V Module is an active piezo buzzer module useful for creating sound in a project.
- Buzzer Active 5V Module
KEY FEATURES OF BUZZER ACTIVE 5V MODULE:
- Uses Active buzzer. Logic high sounds buzzer
- 85db output @ 2.3 kHz
- 5V operation
There are two types of buzzers, Active buzzers such as this one and passive buzzers.
Active buzzers have the drive circuitry built into them, so a simple active HIGH logic level signal will activate the buzzer. Though simple to use, the downside of the active buzzer is that the tone of the buzzer is fixed at a particular frequency and the loudness is more or less fixed. These are mainly useful for signaling or an alarm.
Passive buzzers are more similar in function to a small speaker and need to be driven by a waveform with enough drive current capability to create the desired sound. The advantage of a passive buzzer is that the tone and loudness of the buzzer can be controlled by the frequency and drive power of the waveform that is used to drive it but it is more difficult to use.
The buzzer will draw about 25mA from the S pin. If driving it using a uC output pin, it can be driven directly from the pin, though it is recommended to not draw more than 20mA for extended periods of time. If a lower volume is desired, a small value resistor can be put in series.
It is moderately loud at about 85dB with a 2.3 kHz frequency, so it is best suited for use as an attention getting alarm or beeper. Here is a sound clip where it is being toggled on/off every second.
There is a 3-pin header on the assembly. Note that one some modules, the pins may be in reverse order from the picture shown, so go by the markings on the module.
1 x 3 Header
- ‘-‘ = Ground
- Center pin = Not used
- S = Signal input, connects to digital output pin on uC. Active HIGH
OUR EVALUATION RESULTS:
These modules are useful for adding basic audible signaling to a project. If the buzzer still has the protective paper on it, be sure to remove it for the buzzer to operate correctly.
BEFORE THEY ARE SHIPPED, THESE MODULES ARE:
- Basic output verified
- Packaged in a resealable ESD bag for protection and easy storage.
- This module is similar to or the same as the KY-012.
|Drive Signal||4 – 7V|
|IMax||Maximum Current Draw||< 30mA|
|Sound Output||> 85 dB|
|Resonant Freq||2300 +/- 500 Hz|
|Dimensions||L x W (PCB)||19mm x 15mm (0.75 x 0.60″)|