A piezo buzzer contains a piezoelectric element combined with an in-built oscillator / driver to produce an audible sound. While the output frequency is fixed using them is as simple as applying a DC voltage within the specified range.

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166 views

How to tell a piezo buzzer is broken?

Some time ago I've purchased Bestar Acoustic's F-B-P3009EPB-O1LF piezobuzzer, but only now found time to actually test it. To my understanding, piezobuzzer should just work after voltage (in my case - ...
11
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2answers
755 views

“Remove After Washing” on Piezo Buzzer

Maybe this is a stupid question, but here goes: I just got a piezo buzzer and on the top there is a sticker that says "Remove After Washing". My question is why would I ever want to wash an ...
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1answer
163 views

Arduino: Common Ground Issue? Powering Buzzer, LEDs via transistor as a switch

I'm working on an ugly Christmas sweater with a Lilypad Arduino. Previously it was setup to power LEDs on each side of the sweater using just the voltage from the digital output pins (alternating ...
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0answers
173 views

noTone() and tone() are not implemented for the Arduino Due

As it turns out, noTone() and tone() are in the core arduino API, but seemingly not implemented for the Arduino Due. I was hoping to use tone() and ...
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1answer
267 views

How to produce a simple beep/sound without using piezo-buzzer

I am designing a fairly simple board where I need to sound a simple chirp/beep every couple of minutes, however, layout space is extremely limited. Therefore, a full-blown piezo buzzer is a no-go; ...
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2answers
303 views

Simple Ray gun sound - buzzer

I am trying to put together a ray gun wrist gauntlet for my son's Buzz Lightyear Halloween costume. I think am going to do a little circuit with a big red LED and a 555 timer to make it flash (maybe a ...
5
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1answer
257 views

Understanding and Changing Transistor Oscillator Circuit

I am using a EAST EFM-290ED Buzzer Alarm. It needs to be oscillated to work. I found a simple one transistor setup that makes it work, but I am not sure if it is working well for this buzzer. ...
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2answers
714 views

Small piezo buzzer with low voltage, low current

I am designing a board which communicate wirelessly with a smart phone. When I send a specific command, I want it to sound an alarm to the user, making it able to be found when lost. My board runs on ...
2
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2answers
387 views

How to power a 6-14v piezo from an Arduino?

I have a Arduino Nano and I'm trying to run this Piezo Siren off the circuit. The Arduino is currently powered by a USB plug. The siren expects 6-14v and the digital output pins on the nano are giving ...
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3answers
820 views

How are electronic musical greeting cards made?

I remember that long time ago, when i was a kid (in the 80's) there was some electronic greeting cards that when open up, start playing simple tunes through a small piezo-electric speaker. A quick ...
2
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1answer
85 views

Estimated impedance of a 12V bleeper?

The bleeper(buzzer) I am using is rated for 12 volts DC. It is a piezo electric bleeper and the frequency is created by an internal oscillator. I am not aware with the functioning of peizo electric ...
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1answer
237 views

Piezo speaker with distorted sound

I'm creating a simple circuit, where a microcontroller drives a piezo speaker. I couldn't find a datasheet for the piezo (the part number is HKDZ-G) but I know it has a internal oscillator and it's ...
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4answers
607 views

Is there any way that the Arduino board can get damaged by using a buzzer without a resistor?

I want to use a standard piezo buzzer on one of the Arduino Uno's analog pins without the use of a resistor. Will connecting this be a problem for the Arduino board? Why?
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2answers
325 views

How to indicate a relay is activated?

I have a 12VDC automotive relay controlled by an open-collector NPN output on a remote device. I would like to be able to have an indication of when the relay is activated. I tried (and failed) the ...
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2answers
1k views

Piezoelectric Sensor and the ADC

I would like to hook up a piezoelectric sensor to my ATmega8 microcontroller via its ADC. The reason being is that I would like to use the sensor as a force sensor. I noticed that the harder I press ...
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1answer
1k views

Using Piezo Vibration Sensor with Pull-Down Resistor - Arduino

I'm using a MEAS piezo sensor (this one: https://www.sparkfun.com/products/9196) to detect very slight vibrations, but I'm having trouble selecting a pull down resistor that allows it to be sensitive, ...
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1answer
1k views

Using a microcomputer in the drive circuit of a piezo buzzer

I am interested in the use of a microcomputer in a drive circuit for an external drive piezo buzzer. I was reading the FAQ page on the website of a piezo buzzer manufacturer ...
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1answer
107 views

forgotten laundry stinks - electronic solution [closed]

I forget to move the laundry from the washer to the dryer. The clothes stink when left over night (this has occurred many times before). The buzzer is short and weak therefore, I would like to add a ...
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1answer
411 views

Can I power a 3mA piezo buzzer with a lower than 3mA continuous current battery?

I want to power a self drive piezo buzzer with a rated current given as >3mA. http://www.microbuzzer.com/buzzer/spec/TE-HPS12C-H2.5.pdf I am looking for a small battery I can use to power the buzzer ...
3
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1answer
119 views

Removing a piezo transducer from a reference design

I'm building a system which is intended to supply a microcontroller with a smoke-detection alarm. I'm currently intending to base the circuit on a Microchip RE46C190, which I can source fairly easily. ...
4
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2answers
524 views

How much continuous current is from the battery needed to power my piezo buzzer?

I have found these "bluetooth location stickers" on this website http://www.sticknfind.com/product/sticknfind Inside the stickers is a buzzer and a light. I am trying to build something similar, but ...
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1answer
2k views

Does the drive circuit for a piezo buzzer require extra power?

I want to power a small piezo buzzer with a battery, and I am trying to work out the power requirements. The buzzer has a Rated Voltage of 3V, and the battery has a Nominal Voltage of 3V. The buzzer ...
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1answer
438 views

How can I measure the current draw of a device without powering it?

I'm building a DIY security system for my home, but I'm using the existing sensors and siren that are already installed from my old security company. So, I don't know the current draw of the siren or ...
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2answers
578 views

Single microcontroller pin high-voltage piezo speaker driver, what are the pitfalls?

I just read this article, Microcontroller drives piezoelectric buzzer at high voltage through one pin, and it sounds too good to be true. The schematic: Q1 and Q3: BS250 Q2 and Q4: BSS295 This ...
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1answer
303 views

What is the cheapest way of producing audible sounds? [closed]

I am in need of producing an audible sounds in my circuit, when instructed by a microcontroller which it is attached to. So far, the cheapest way I have found is to use a piezoelectric style buzzer, ...
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5answers
735 views

How do you remove the buzzer from this PCB whose solder side is inaccessible?

(Click on an image to see in original size.) There is this buzzer in this UPS (uninterruptible power source) circuit. I want to remove it from this circuit because it make a lot of unnecessary ...
8
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2answers
1k views

Is this a proper way to connect a piezo speaker to MCU?

Is this a proper way to connect a piezo buzzer to microcontroller pin? Is there anything that could be improved in the sense of robustness and power consumption? How do i select D1?
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1answer
849 views

Resonant frequency of piezo elements, and generating multiple tones

In another question I posed, there were couple of "piezo sounder" parts suggested for the purpose of a compact but reasonably loud, alternative to electro-mechanical hooters. Was trying to understand ...
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0answers
372 views

Best Speaker/Buzzer/Noise Maker for my project?

the project I am working on plugs into the headphone port of a cell phone and will be used over night. However, when you plug in anything to the headphone jack of a phone, the alarm gets rerouted to ...
3
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4answers
2k views

Piezo barely audible

Let me start by saying that I'm pretty new to electronics, so be gentle ;) I'm able to get good, solid tones from my piezo when nothing else is connected. When I connect it alongside my servo + ...
3
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3answers
2k views

Buzzer on a computer mainboard

I would like to remove the buzzer on an Intel mainboard, and replace it with an LED with a resistor. Is there a standard voltage that I can assume that comes to the two ends of the buzzer? Why was a ...
3
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2answers
402 views

Piezoelectric transducer drive circuit

I have a small (1/2"sq.) thin film piezoelectric transducer that I would like to use to test the frequency response of musical instruments. I want to be able to stick it on to any instrument , send a ...
3
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2answers
1k views

Low power way to make a sound

I'm designing a 3V button cell battery powered device. I want it to beep or click or just make any noise at some times just loud enought to be heard across the room. I've made a prototype working on ...
2
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3answers
2k views

Can I supply a 12V buzzer with 18V?

I'm trying to make a little buzzer for my bike to sound occasionally to warn off bears. I have a 12V buzzer from Radio Shack (Cat. No. 273-065) and was wondering if I could run it off of 18V directly ...
5
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1answer
827 views

Difference between NE555P and 555CN?

I'm working on a circuit that uses two 555 timers. At the electronics store, they gave me a handful of 555 chips, I only noticed the difference when I finished my circuit: the R1 value is shorted out, ...
4
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5answers
2k views

Random time timer

I'm constructing a simple circuit that beeps a beeper on a given time interval, using a 555 timer. Is there any simple way to randomize the time on the 555 timer between two given intervals, say, any ...
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2answers
574 views

matching game with light or buzzer [closed]

My students made a matching game that matches states with governors. We can make it light up if they get the question right. How do we make it sound a buzzer when the answer is wrong?
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3answers
1k views

Piezo circuit issues

In my circuit I am seeing strange behavior from my piezo. I am driving a 4Khz (TDK PS1240P02BT) piezo buzzer with a BSS138K N-channel logic-level enhancement FET. The PWM output of my microcontroller ...
2
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4answers
385 views

Buzzer alarm problem

I've got an assignment to make some kind of alarm. When user presses the push button, 1kHz sound should be generated and outputted on some kind of speaker (I'll use buzzer). That part I know how to ...
4
votes
1answer
455 views

Good explanations of audio piezo element behavior

Is there any description anywhere of how voltage, current, mass, momentum, and air interact in a typical audio piezo, and what sort of signal should be expected on the third pin of a three-terminal ...
2
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1answer
521 views

Electrical Characteristic of a piezo buzzer

I stumbled upon this piezo buzzer and I don't know how to interpret its specifications. What's the difference between Rated Voltage (Vp-p Square Wave): 5Vp-p and Operating Voltage: 1 to 20 Vp-p ?
16
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2answers
4k views

What's the third wire on a piezo buzzer?

Most piezos I've seen have just two connections, but this type has three. What's the third wire for?
4
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1answer
4k views

Driving piezo buzzer from MCU pin

Good day! I'm looking for the right circuit to connect my piezo buzzer to MCU (STM8S in my case). I don't have a partnumber\datasheet for my particular buzzer, but I've found a number of similar ...
4
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2answers
2k views

What's the function of the diode in this driver connected to a piezo buzzer?

I can't remember the source of this image, but I found a similar image in an Ekulit catalog. One recommended circuit shows just a resistor in series with the piezo buzzer. But this one adds a diode. ...