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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2
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1answer
172 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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1answer
60 views

(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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1answer
43 views

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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5answers
155 views

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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1answer
47 views

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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0answers
32 views

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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2answers
589 views

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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2answers
184 views

How can I reduce the volume of my dryer buzzer?

Like many of us, the buzzer in my 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 replace ...
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2answers
43 views

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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1answer
121 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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2answers
128 views

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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1answer
110 views

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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1answer
69 views

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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1answer
334 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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1answer
1k views

How to make active buzzer louder

I have an active buzzer connected to an Arduino and everything works fine but the buzzer is just not loud enough. I don't know any specs about the buzzer but I've tried connecting it to a 9v battery ...
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0answers
145 views

Beeper for lost FPV drone

I am not an expert in electronics, just the very basics so please bear with me. I am trying to create beeper alarm for my FPV drone that will activate when it crashes or no movement for certain ...
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1answer
189 views

Using piezo buzzer to play complex waveforms

Would it be possible to play complex waveforms(sine waves, triangular waves, multiple voices and suchlike) using a normal piezo buzzer? The buzzer in question doesn't have internal oscillator. [...
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1answer
146 views

One GPIO pin for LED, Pushbutton and Buzzer via high-pass filter?

There's Pin as both input (for a switch) and output (for LED) with ATmega32U4? but I also need one of six such pins to drive a piezo buzzer. Due to its capacitive nature, I figured it could be ...
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1answer
148 views

Transistor switch - extra resistor required?

I am new to electronics and this forum, and am in the process of building a Raspberry Pi based homebrew controller. Following the article in the eLinux wiki, here is the relevant part of my circuit: ...
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1answer
451 views

Startup Buzzer Sound

I have made a button box, using an Arduino mini pro, which includes LEDs and buzzers. I am using a shift register (74HC595) with a ULN2003 (to use 12v on the LEDs) to decode the SPI. See the top ...
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1answer
929 views

Arduino nano, unexpected sound from buzzer when receive data from radio module HC-12

I make a simple circuit with an: Arduino Nano HC-12 Long distance radio module HC-12 Antenna 1000 uF Capacitor Buzzer 220 Ohm Resistor I need that the buzzer emits a noise when Arduino receives ...
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2answers
694 views

How to silence a 5V electrical beeper/buzzer [closed]

We have a simple circuit operated by 2 AAA batteries, it has a simple board inside with one of these 5V electrical beepers that makes sound every time it does something. It looks exactly like the one ...
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1answer
120 views

12V LED, Buzzer, and 4 Switched grounds enter a Bar

First posting so I will try not to step all over the rules. Notice: I am a novice. My project is 12 volts DC and to have a buzzer activate when any of 4 LEDs are illuminated. I have a few ...
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3answers
1k views

Piezo buzzer giving faint clicks instead of loud buzz

Please note: Even though this question involves a Raspberry Pi, I really think its an essential electronics question at its heart, and that the fact that I'm dealing with a Pi is secondary. I have ...
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2answers
2k views

Why don't piezo buzzers require resistors?

I'm new to electricity & electronics and am fumbling my way through some Raspberry Pi tutorials. One in particular has caught my interest, which hooks an RPi up to LEDs, pushbuttons and a piezo ...
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2answers
2k views

How to tell if a buzzer is passive or active?

I see a lot of buzzers (like this one) that are sold online and don't advertise whether they are active (a DC power signal produces noise) or passive (to make noise they require both the DC power ...
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0answers
117 views

ESC/POS pulse activated siren

I would like to design a system that works with my ESC/POS thermal printer that activates a siren when a receipt is printed. My thermal printer has an RJ12 port which is intended to connect to a cash ...
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2answers
357 views

Running a magnetic buzzer using coin cell battery

I would like to operate a small magnetic SMD buzzer using a coin cell battery. However, magnetic buzzers require at least approx. 40mA to run, which I think is more than a coin cell battery can output....
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1answer
583 views

How to reduce/remove piezo pickup hiss

I made a stompbox which is basically a small wooden box with a piezo element inside that when stomped on produces a sound similar to a bass drum except that the thing is much more portable. The ...
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4answers
1k views

Hacking musical birthday cards [closed]

I bought a musical birthday card with a small circuit in it hooked up to a piezo speaker. I took the circuit out and realize that it was ridiculously simple (from what I can see). So I was thinking if ...
2
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1answer
240 views

Produce loud noise for a security alarm

I would like to build a security alarm that just buzzes when a door opens. My question is can I use a speaker to generate a loud buzzing noise or I need something else like a piezo buzzer? If I can ...
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1answer
248 views

My ATTiny84 circuit works fine until I connect a piezo buzzer

I've got a mini-game coded with an ATTiny84, a shifter, 7 LEDs and two buttons, plus accompanying resistors. It works great! Until I connect a passive piezo buzzer, that is. Then the timings go off, ...
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3answers
1k views

How to make a piezoelectric transducer buzz louder?

I am trying to make a piezoelectric transducer buzz loudly, but have so far only been able to make it create a quiet hum. I have tried using a basic amplification circuit with an NPN, but this made ...
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2answers
313 views

How can removing a piezoelectric speaker/buzzer damage a circuit?

According to a comment at DIY stackexchange: "...disconnecting a passive piezo speaker that is fed via a transformer could theoretically upset or even damage the electronics feeding it." How could ...
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1answer
103 views

Aircraft Starting Mockup Display With Buzzer Question

I am stuck in the middle of building a circuit for an aircraft starting mockup that will train our students to correctly start the aircraft without accidentally re-engaging the starter and thus ...
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1answer
108 views

How do you create a simple and cheap tension alarm?

Background I'm creating some party games and someone had the idea to place yarn or string in a hallway, similar to laser grid, that people would have to navigate without touching. Problem So I was ...
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1answer
64 views

Will a 24 volt buzzer work with 19 volt supply lines?

I'm fixing up an apartment condo and opened the doorbell buzzer/door unlock wallplate looking to install a new wallplate and button that isn't caked in old paint. When I slid the housing out, the ...
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10answers
22k views

What is the difference between a buzzer and a speaker and are there any other basic electric/electronic things that output sound?

I am playing with a speaker and a microcontroller and in some documentation the speaker is called buzzer. The assistant told us that is a mistake and we are dealing with a speaker. I am wondering ...
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3answers
918 views

Using a digital pin out for a buzzer

I am developing a product using the BLE NANO (nrf51822). Here is a pin out diagram: I was following some tutorials and they said to use PWM out of an analog pin to make sounds with a buzzer (I was ...
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2answers
503 views

Why do most Passive Buzzer Modules for sale online use PNP transistor?

At first I have made a simple circuit to make tones with a passive buzzer. I have used a buzzer, 1K resistor on base and a NPN transistor (8050). This is working nicely. The circuit is similar to what ...
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3answers
2k views

Which transistor should I use in my circuit?

I've made a rudimentary flood alarm (a circuit that rings a buzzer when the water in a reservoir is full) using a 9V battery and a cheap Chinese buzzer that came without a current rating. All I know ...
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1answer
541 views

Weird problem with ADXL345, Buzzer and Arduino

I've set up a Serial port via a Bluetooth module (HC05). I'm using a JavaFX app that I wrote to read the serial port, plot the acceleration values (via ADXL345) and write back to the serial port an ...
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2answers
639 views

Interface Piezoelectric wafer buzzer with microcontroller

Can piezo-buzzer be interfaced with MCU same as normal 5V continuous buzzer? I am talking about the flat thinnest buzzer like this. We need to feed PWM to this to create different tones right? If ...
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1answer
412 views

Piezoelectricity in water mediums

I am trying to run an experiment using a piezo ceramic cylindrical transducer (32X30X10MM 29 KHZ) to send a signal from the inside of a water-filled test metal tube to a transducer mounted on the ...
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1answer
759 views

Arduino buzzer resistor requirements

I am currently using pin 13 and the ground pin to connect an old salvaged buzzer from an old stationary phone. Also I am using this command to power it's tone(13, 59, 30000). Does this have the ...
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2answers
1k views

Piezo Buzzer Coil or Resistor oscillator

I found two ways of working with piezo like a buzzer. In the first case, we use only a resistor. When we turn ON the circuit, I have my transistor off, With Vc=VDC. When the piezo sends a feedback ...
3
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1answer
2k views

Amplify piezoelectric transducer voltage

I have an audio-band piezoelectric transducer with a 17 kHz resonant frequency (among others). I'd like to use this transducer to acquire from an MCU an FSK modulated audio signal. When I plug the ...
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2answers
168 views

Using UPS buzzer as a method of determining AC power

The only real UPS solution for me where I live is "RCT", a UPS manufactured by a local PC Hardware supplier. It has a USB port, but I can't find any details about it. I've even contacted the ...
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0answers
1k views

Piezo Buzzer Driver Circuit

I haven’t used a buzzer before so I have tried to find out as much I could and finally, I am here to clear my few doubts: Few details about my application: Buzzer: AST1240MLTRQ (i was not allowed to ...
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1answer
207 views

What's wrong with my buzzer driving?

When I turn on/off buzzer via D17 using my Ardunio nano board, the two Leds RED and AMBER turn on/off too. I don't want this occur but don't know how to do this. Can anyone can help to show me what ...