Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
2answers
110 views

Hardware For Emitting Specific Sound Frequency

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 (...
0
votes
1answer
56 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 ...
-4
votes
0answers
31 views

Best 2n2222a based audio amp schematic for piezo buzzer disk contact microphone for human speech? [on hold]

Could anyone point me to a good, or even awesome circuit schematic using the 2n2222a transistor in an audio amp for a piezo buzzer disk contact microphone? I intend to use it to capture and listen to ...
-1
votes
0answers
26 views

How to use 2 wired piezo plate like a 3 wired piezo plate

I am trying to make a buzzer using a piezo plate like in this video: https://www.youtube.com/watch?v=a4NZqbFhnug&t=40s&list=LLEse2irV_Sa80Dtw0uuKCSQ&index=5 But I can not find a 3-wired ...
0
votes
1answer
49 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 ...
2
votes
1answer
165 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 ...
1
vote
1answer
452 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 ...
1
vote
0answers
99 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 ...
1
vote
1answer
72 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. [...
1
vote
1answer
115 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 ...
0
votes
0answers
35 views

Hardware to to simulate a poor-quality connection to a piezobuzzer

I have a piezo buzzer component that produces a clean tone after I connect it directly to a voltage source. I noticed while I'm making the connection, or I scrape the battery lead across the piezo ...
1
vote
1answer
111 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: ...
0
votes
1answer
324 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 ...
1
vote
1answer
693 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 ...
0
votes
2answers
488 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 ...
0
votes
1answer
104 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 ...
1
vote
3answers
702 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 ...
2
votes
2answers
1k 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 ...
0
votes
1answer
1k 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 ...
0
votes
0answers
98 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 ...
1
vote
2answers
275 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....
1
vote
1answer
442 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 ...
5
votes
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
votes
1answer
200 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 ...
0
votes
1answer
193 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, ...
0
votes
3answers
694 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 ...
2
votes
2answers
258 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 ...
1
vote
1answer
85 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 ...
0
votes
1answer
86 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 ...
0
votes
1answer
60 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 ...
18
votes
10answers
18k 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 ...
0
votes
3answers
742 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 ...
0
votes
2answers
380 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 ...
1
vote
3answers
1k 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 ...
3
votes
1answer
456 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 ...
1
vote
2answers
534 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 ...
1
vote
1answer
330 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 ...
0
votes
1answer
622 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 ...
3
votes
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
votes
1answer
1k 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 ...
1
vote
2answers
153 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 ...
2
votes
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 ...
0
votes
1answer
156 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 ...
3
votes
2answers
636 views

Picking source resistance for impedance matching

I am trying to drive a piezoelectric transducer with maximum power transfer possible with minimum possible noise. In order to do that I am trying to implement LC matching circuit such as circuit ...
0
votes
2answers
524 views

Voltage Rating of a device

When a buzzer 'rating' is 3v, What does that exactly mean? When my buzzer 'input range' is from 3-10v?What does 'rating of a device tell us? Can someone differentiate between the two parameters above?
2
votes
2answers
320 views

12V sound transducer not loud enough

I implemented the circuit below using these components: LOUDITY LD-BZEN-1212 - its description is "Sound transducer: electromagnetic; without built-in generator" and I am guessing it works like an ...
1
vote
1answer
481 views

Two multimeters in continuity mode, only 1 buzzer

I have two identical digital multimeters both with new batteries. I set both to continuity mode and connected the leads to each other. Only one of the meters buzzers went off. They both work ...
-1
votes
1answer
73 views

How to safely remove SMD piezo-buzzer from QI charger?

I have a QI charger which goes by title "Solomon SQI-500". Whenever device is placed on the charger last makes annoying beep. I suppose I located this buzzer at the board of device and there it is on ...
3
votes
4answers
5k views

Buzzer Driver Circuit

Recently, I have ordered smt-0440-t-r buzzer from Mouser. Circuit is as shown in figure. Microcontroller pin transmits square wave of 4kHz as mentioned in the datasheet. However, the sound isn't ...
0
votes
2answers
754 views

Blocking DC when driving a buzzer with a PWM signal

I am driving a piezo buzzer with a PWM signal (typical freq. 100Hz-1kHz) in order to generate 'beeps'. However due to software constrains (*), when the PWM signal is stopped I can't control if it ...