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Questions tagged [piezo-buzzer]

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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Shared buzzer - algorithm for switching on and off

Question is not about electronics but requires specific experience in building the electronics. I am designing the circuit which would beep with various shapes - on/off durations as well as beep ...
Anonymous's user avatar
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Piezo T/R switch

I try to use single piezo as transceiver. Is this possible if i can T/R switch using FET or BJT ? I found this schematich but not sure if it works. https://www.researchgate.net/publication/...
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Using piezo as range sensor

My objective is to use a single piezo as a transceiver and calculate the distance between the sensor and the object that sound echos from using time of fly. I use ...
ali demir's user avatar
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Piezoelectric disks gives higher output at a particular low frequency far from the resonant frequency?

I have a PZT disk attached to a shaker/vibration generator. The resonant frequency is 3.9kHz. The following is the output of the PZT disk on the shaker, being shook at different frequencies. One ...
HFOrangefish's user avatar
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Charge Amplifier not amplifying at most frequencies

I have a piezoelectric element, which acts as an accelerometer. Attached to it is a charge amplifier, built based on this documentation. The op-amp is the TL081. The PZT element is simulated based on ...
HFOrangefish's user avatar
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Piezo electric buzzer as a crystal earpiece? [closed]

Making a foxhole radio, saw on https://rimstar.org/equip/crystal_earphone_earpiece_for_crystal_radio.htm can you actually use a buzzer as a crystal earpiece?
Phineas Haskell's user avatar
2 votes
1 answer
126 views

Piezo buzzer testing for defects using electrical parameters

I am looking for methods to verify whether a Piezo is damaged/defective or good. Are there ways to verify that using just electrical parameters like resistance, capacitance etc. My issue is that it's ...
Anurag Kumar's user avatar
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Speaker and buzzer sound levels issues

I have designed two test boards to evaluate the sound levels of several speakers and buzzers. While the buzzers are functioning as expected, the speakers are producing sound levels that are ...
Dario's user avatar
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3 answers
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Piezo transducer as both microphone and speaker

I'm trying to find the best piezo transducer for my project, which is a Morse code sender and receiver. Since a piezo transducer can both act as a speaker and a microphone, and I only send/receive at ...
Björn Morén's user avatar
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1 answer
96 views

How are piezoelectric buzzer ceramics polarized to make them change diameter instead of thickness

Synthetic piezoelectric materials are polarized by applying a high voltage to them and heating them above their Curie point then cooling them. When a voltage of the same polarity is applied they get ...
Peter R. McMahon's user avatar
1 vote
1 answer
159 views

Self Drive Piezo Element/Self Excited Piezo Element Circuit

I have a self drive piezo element/self excited piezo element that I want to resonate at about 1-2kHz. As of my understanding, by using a circuit like in the figure below, the element will resonate at ...
eidetech's user avatar
1 vote
3 answers
629 views

How does the KLJ-5030 buzzer work?

I need a small package buzzer to replace the regular piezo buzzer which is too big for my design, so I tried the KLJ-5030. I tested by applying 3V to positive pin and GND to negative pin and heard a ...
Unicorn's user avatar
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2 votes
2 answers
289 views

Weird behaviour on N channel MOSFET and buzzer

I just assembled my PCB design that uses an ESP32-c3-mini-1 as the brain. I'm testing all the peripherals and found an error when testing buzzer circuit. I'm using a T2N7002BK N-channel LM MOSFET as a ...
Dominykas's user avatar
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2 answers
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Turn on an alarm indefinitely when logic is true

I would like to turn on the piezzo buzzer in the following simple schematic indefinitely when the logic is true i.e when both inputs to the AND gate are logic 1. The pulse in the second input can last ...
Zipho Lunika's user avatar
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305 views

Get rid of piezo buzzer base (annoying) buzzing sound when LED's connected to same power source (+5v) are turned on

I have a circuit in which a piezo buzzer is connected to a stm32f303 mcu like so (the DAC pin goes straight into the MCU): I also have some WS2812B mini LEDs that are connected to a +5v plane (which ...
Bob Stone's user avatar
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297 views

How can I power a 5 V - 7 V buzzer with a 24 V power supply?

I'm working with a 24 V power supply. I know I could use a voltage regulator to 5 V to power the buzzer (see image below), but I wanted to experiment to see if could make it work with just a resistor ...
Citi's user avatar
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Activating an Active Buzzer from PWM Signal of an LED driver

I would like to turn on an active buzzer TMB12A05 using the decimal place output channel of a TM1638 display driver that is designed to drive LEDs using a PWM signal. I considered using a passive ...
Jay Dee's user avatar
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Replacing piezo buzzer with vibration motor

I am looking for a simple and inexpensive way to replace 12V 12mA piezo buzzer with 1.8~3V 50~80mA vibration motor, something like VC1034H025L. The piezo is driven by 30ms pulses at intervals varying ...
Maple's user avatar
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How to figure out the current drawn by a 40kHz ultrasonic transducer?

I have some 40kHz ultrasonic transducers (the same type as which you find in the common Arduino ultrasonic distance sensors.) All information comparable to a datasheet I got was: I don't get how to ...
TeD van Loon's user avatar
-1 votes
1 answer
95 views

Using piezo buzzer to play sounds from a device

I'm curious to see if it is possible to wire a piezo buzzer to a headphone jack and make it play sound coming from a pc or a phone?
AidanGamin's user avatar
-4 votes
1 answer
120 views

Is this circuit the right way to drive a piezo buzzer? [closed]

I am trying to drive a piezo buzzer and came up with the following circuit. Am I doing it right?
Adnan's user avatar
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2 votes
2 answers
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Can I safely remove the buzzer from a Philips air purifier?

I am trying to silence my air purifier (Philips AC5659/10). I think it uses a piezo-buzzer (front & back of PCB visible on page 4 of this document). In a similar vein to this question, I would ...
Karol J. Piczak's user avatar
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1 answer
164 views

Use TC4427EPA to drive an audible buzzer

I am using a TC4427EPA to drive a piezo buzzer, with two bypass capacitors on the supply voltage, as recommended by datasheet. I have used the same setup to drive a 40 kHz ultrasonic speaker (with a ...
Nick Lee's user avatar
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Would this circuit work for driving an internal buzzer?

A quick note, I had asked a similar question around driving an external buzzer previously: Driving external piezo buzzers This is a question in regards to driving an internal buzzer, so not a ...
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Why is my piezo buzzer emitting a clicking sound?

I'm trying to make a voltage controlled oscillator (VCO.) It works just fine, but my piezo buzzer keeps clicking in conjunction with the square wave the NE555P is producing, making a weird effect. Is ...
Dcybroz's user avatar
3 votes
2 answers
255 views

Can I increase the inductive component stored-energy of a Piezo Buzzer?

In this example of a model for a piezo element, there is an inductive component (I think this is a quartz crystal model -- it should not matter for the question. This graphic was also used here and ...
MicroservicesOnDDD's user avatar
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2 answers
1k views

Driving external piezo buzzers

I am planning on using the following buzzer in my design ( SMACT-25-P15): https://uk.rs-online.com/web/p/piezo-buzzer-components/8055272/ It says it requires external circuitry for operation. I have ...
Hasman404's user avatar
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2 answers
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Can somebody explain how this piezo-driver circuit works?

The source is this video. I have countless number of questions about this schematic but there is the most pressing ones: Why L1 is connected to SP1 in such a strange way (right in the middle, and not ...
ScienceDiscoverer's user avatar
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1 answer
223 views

Why is my Multivib piezo atomizer/transducer driver not working?

I'm tying to drive a "Moisturizing Transducer Mist Maker Atomizer Film Plate" using a simple astable multivibrator circuit like this: I can't make it work. No reaction from the atomizer. I ...
ScienceDiscoverer's user avatar
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214 views

Digikey and help with name of component: Passive Buzzer

First time in this exchange, so please let me know if I am in the wrong location. I am fairly new to using components ordered online for circuits, as I have a basic arduino starter kit. However, I ...
Collin's user avatar
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0 answers
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Environmental sealing of buzzers

If you have a buzzer mounted in an enclosure and you want to let sound get out freely, but prevent ingress of dust and water, are there standard techniques or solutions to this common electronics ...
user57037's user avatar
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481 views

Piezzo buzzer schematics design

I've been having some issues with buzzer schematics pictured below. Transistors have always been my weak spot and I currently don't have time to dive into it and just need this to work. Quick what's ...
KristjanB's user avatar
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224 views

TinkerCad - How to Compare two circuit projects for differences?

My daughter and I have created two circuit boards in tinkercad and they appear to be identical. However one is behaving correctly and the other is not. I've been going through each component setting ...
Brian's user avatar
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1 answer
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Why active buzzers (and some vibration motors) require LOW in order to emit sound

I have an active buzzer which I connected to an arduino pin (besides the other two pins being connected to Vcc and GND). I would expect the speaker to beep when I do a digitalWrite(PIN, HIGH) but it's ...
Paperino's user avatar
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1 vote
1 answer
244 views

How does this buzzer volume regulation work?

I've found a usage of a buzzer with volume regulation that I hadn't seen before. Here's the schematic: Timers PWM are activated like this (Atmel MCU) : ...
Singed's user avatar
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-3 votes
2 answers
2k views

Can a MOSFET or transistor be used to switch on a 9V supply using a 3.3V signal?

***Technical question, not a wiring problem. I am building a bicycle alarm system and I'm a little stuck on the alarm output. I wonder if I am approaching this problem wrong. My alarm piezo ...
user3308807's user avatar
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1 answer
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Replacement part for a buzzer to eliminate beeping

We recently bought an aroma diffuser. Itʼs operated from a 24V DC wall adapter, but for most of the electronics itʼs dropped to 5V (24V is only needed for the actual diffuser part). It works like ...
GergelyPolonkai's user avatar
8 votes
7 answers
7k views

Lowering pitch sound of a piezoelectric buzzer

I have tried to drastically lower the pitch of a piezoelectric buzzer, but to no avail. All the piezo buzzers I have emit a very high pitched whistle-like tone. I've tried changing all the parameters ...
Eddie's user avatar
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3 answers
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I'm making a simple dark sensor project with a light dependent resistor (LDR) and I want to replace the LED with a buzzer but it doesn't work

I replaced the resistors with small ones to give the buzzer more current,but itstill doesn't work. I checked my buzzer and it's working fine. The circuit works perfecly with the LED in the breadboard ...
Ahmed Lotfy's user avatar
10 votes
2 answers
5k views

How does the component "alarm boost three pin inductor" make a piezo buzzer louder?

I have a small circuit working on 2xAA batteries (3V) with an MCU and a buzzer for alarm sound. I've already successfully used an active buzzer (with build-in driver oscillator) drived by an NPN ...
EttoreP's user avatar
  • 201
0 votes
2 answers
744 views

What makes an active buzzer oscillate?

All I can find online are descriptions on how active buzzers have an oscillator built in so that you just need to feed them a DC and they buzz at the frequency set by such oscillator, but I haven't ...
palako's user avatar
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1 vote
1 answer
2k views

What do HSDZ and HYDZ mean for piezo buzzers?

I have some buzzers, which have a label on them, which states "HSDZ REMOVE SEAL AFTER WASHING". I know that washing is the process of removing residues of flux or something else with solvent....
Saren Tasciyan's user avatar
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1 answer
2k views

Buzzer circuit problem in Proteus

In this circuit, the buzzer should sound when the button is pressed. ...
Onur arslanoğlu's user avatar
1 vote
1 answer
824 views

Idea for a PC bios beep buzzer

Hi I want to make a buzzer for my PC motherboard. Similar things like this: https://boip.in/home/rajiekart-pc-motherboard-internal-speaker-bios-alarm-buzzer-1-pcs-pack?gclid=...
Ashok Das's user avatar
0 votes
2 answers
120 views

Why do magnet door/window alarms use always-on switches?

I am looking at door/window alarm designs, and they all use overcomplicated circuits with an always on switch, where the piezo is triggered when the switch is off. If the switch was always off, it ...
bandybabboon's user avatar
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1 answer
205 views

why my active piezo buzzer doesn't give any signal as an input?

I wanted to use my active buzzer as a vibration sensor like the knock lock project of the arduino starters and problem is I can't get any output out of it I expected that that it is because the ...
Mahmoud Salah's user avatar
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1 answer
197 views

Are passive piezo speaker more reliable than magnetic ones?

I'm going to use sound notification in my desing (just beeping). My buzzer needs to be suited for cold ambient conditions (up to 0 celcius degrees), high humidity and shocks. Which buzzer type will be ...
Michal's user avatar
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5 votes
1 answer
2k views

Single input controlled full H bridge for piezo buzzer

I would like to incorporate a buzzer in a PCB design. It would not be a coil buzzer, but more a piezo buzzer, and its operation is to be controlled with a micro-controller powered by the same voltage ...
Allart Alan's user avatar
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0 answers
178 views

Buzzer Voltage and Current waveforms

I have a buzzer circuit. Waveform : My questions : I have marked the points in the circuit where I am measuring the voltage and the current. PWM pulse is given to the base of the transistor. I ...
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0 answers
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Do active PZT audio buzzers (with built-in driver) create dangerous spikes on power supply?

I am planning to add a active piezo element audio buzzer with built-in driver (BESTAR BPT-14X or LOUDITY LD-BZEL-PB04-1408 ) to my recent quite complex MCU project. These buzzers come with built in ...
HeliTux's user avatar
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