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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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 ...
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-1 votes
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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?
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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?
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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 ...
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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 ...
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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 ...
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3 votes
2 answers
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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) : ...
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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 ...
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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 ...
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5 votes
5 answers
3k 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 ...
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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 ...
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6 votes
2 answers
2k 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 ...
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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 ...
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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....
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Buzzer circuit problem in Proteus

In this circuit, the buzzer should sound when the button is pressed. ...
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1 vote
1 answer
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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=...
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2 answers
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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 ...
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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 ...
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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 ...
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4 votes
1 answer
870 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 ...
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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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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 ...
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Need help designing LiFePO4 BMS disconnect alarm

I need help designing an alarm for a 12v LiFePO4 + BMS system. I am using an off the shelf BMS. The BMS has internal FET switching which may disconnect the battery for a variety of reasons to protect ...
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2 answers
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Calculate power on time of a buzzer

I would like to use a 5v active piezo buzzer to beep for a second or two. When the relay is on NO the capacitor will charge from the dc source and when the relay is on NC the capacitor will discharge ...
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1 vote
1 answer
758 views

Potentiometer volume control for a piezo buzzer in bridge (2-pin) configuration

I have a 10K potentiometer that I'd like to use to control the volume of a piezo transducer/buzzer, which is driven by one or more MCU PWM-capable pins (ranging from 0 to 3.3V). Originally, my ...
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what is the difference between these two buzzers? [closed]

I am looking for a 5v buzzer and I saw a chinese pack of 24 for 9 dollars on Amazon https://www.amazon.com/tatoko-Electronic-Magnetic-Continuous-Arduino/dp/B07QBHPG2X/ref=sr_1_17?keywords=5v+buzzer&...
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2 votes
1 answer
597 views

Piezo buzzer vs Speaker

Can anyone explain that what kind of sound a piezo can and cannot produce when compared to A speaker. Can it just play notes? Is there some quality reduction in piezo buzzer?
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(Assumed passive) piezo buzzer makes sound upon shorting leads?

I found a piezo buzzer in an old circuit board. It's (literally) a black box, size of a big coin, maybe 0.8 cm thick, 3 cm across, and a red and a black wire coming out. When I short the red and black ...
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Buzzer circuit understanding

I have a question concerning this circuit I have found on internet since I would like to replace it with a mini dc motor vibrator. Is there any chance someone could explain to me how it works? As ...
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5 answers
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Is it possible to use 7805 regulator without capacitors at its input and output pins?

I have to drive a magnetic buzzer whose current is 50mA and max. voltage is 6V. I will use 7805 regulator to drive it as my supply voltage is variable 9V to 24V DC. There will be another small load ...
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How do I calculate the resistor value for this circuit? Will this circuit allow buzzer to work?

I have a circuit that uses an LED and a simple buzzer. I've created a basic circuit (below) and used a speaker to represent the buzzer. I know two things about the buzzer : Rated Voltage: 12V; ...
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Piezo buzzer : transient audible noise when exciting over 20kHz

Let's 2 simple experiments, connect a piezo buzzer like this one to a bench amplifier driven by a function generator like this one. Driving voltage is 10V. Now excite it with a linear chirp from ...
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8 channel quiz buzzer circuit using 8051 microcontroller

Project: 8 channel quiz buzzer circuit using 8051 microcontroller from this site. For the first candidate who presses their button, their number will show on the 7-segment display and the buzzer will ...
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3 votes
2 answers
2k views

How can I reduce the volume of the buzzer of my laundry dryer?

Like many of us, the buzzer in my laundry dryer is loud as hell. I recently opened up my dryer to repair it and easily found the buzzer and simply disconnected it. However I got to thinking: Could I ...
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1 vote
2 answers
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Measuring unknown speaker/piezo element

I have an assortment of small speakers/piezo elements and I'd like to connect them to an arduino without damaging either. I don't know what characteristics the elements have or what to look for but I ...
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2 votes
1 answer
1k views

Understanding piezo buzzers and their specification

I am using the following piezo buzzer: As far as I understand, a piezo buzzer is a capacitive load. So the current loading this capacitance should be limited in order not to burn the driver (in my ...
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Hardware For Emitting Specific Sound Frequency [closed]

I need a battery-powered hardware setup for emitting a specific frequency or a range of frequencies, in the range of 17kHz-20kHz. It should be picked up by microphones from at least 8 meters away (...
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Bypassing refrigerator door alarm piezoelectric buzzer

My appliances keep beeping at me. How can I deactivate or bypass this refrigerator door alarm buzzer without affecting the rest of the circuit? I thought I could just cut/connect the wires at the ...
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3 votes
2 answers
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Drive 10 piezo buzzer from micro controler simultaneously and independently

I'm looking for a solution to drive simultaneously 10 piezo buzzer from teensy. I'm aware about the limitations of the number of internal timers so I'm looking for an external chip that would enable ...
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2 votes
1 answer
938 views

How to add a LED to a Multimeter for use it with the buzzer in continuity testing?

I want to add a notification LED to my digital multimeter which i need to glow with the multimeter`s inbuilt speaker (piezo/buzzer/beeper) while in Continuity testing mode. MM Model : DT830D If i ...
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