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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Buzzer vs piezo sound for generating sound

Correct me if i'm wrong. Buzzers can only produce 1 tone but are quite loud. While piezos can generate a wide variety but are most suited to ics. Is there anything i missed?
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30 views

Improve a simple “magnetic alarm” with a timer, to extend the ringing time

I've bought this simple "alarm" for a door: Which is internally provided with a reed switch; inspecting the internal circuit using a multimeter, I figured out that when the magnet is placed near to ...
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3answers
44 views

Piezo or vibration sensors?

I see that there're vibration sensors and that piezo can detect vibrations. Which is better (more sensitive) for detecting knocks over a piece of wood? I'm looking for a small package, so I'm only ...
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1answer
52 views

Is there an internal resistivity in buzzers?

I would like to know if there is an internal resistance in buzzers, and if yes, what could be the internal resistance for a cheap buzzer that can go up to 12V. Thank you
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2answers
104 views

How to design car buzzer alarm with minimal current consumption of 12V battery?

Could you please help me to design Car alarm buzzer circuit using relay, and Input of the relay and buzzer should be +12 volts from car battery. when i have searched about some circuits and buzzer its ...
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0answers
37 views

Can i use a hartley oscillator to drive a piezo atomizer?

I am currently trying to build my own natural oil diffuser and I have just finished ordering some piezo atomizers that operate at 1.75MHz. I was wondering if I could use a Hartley Oscillator to drive ...
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2answers
379 views

Simple piezo buzzer circuit--could I power it using a large battery?

I am fairly new to electronics. I was thinking about a simple circuit and was wondering if it would theoretically work or not. Say I wanted to connect a 12V Piezo buzzer to a switch and a large ...
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1answer
123 views

Replacing a 8 ohm Speaker with a Piezo. Will it work?

Like Replacing a piezoelectric speaker with an electromagnetic one, but the other way round. simulate this circuit – Schematic created using CircuitLab A DC squarewave will turn on and ...
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1answer
108 views

Safe to remove piezo-buzzer from this PCB?

(Click on images for larger view.) The AC indoor unit I own has an 85dB, 2kHz piezo-buzzer on the PCB. I find it unnecessarily loud, so after coming across this question I filled its hole with ...
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1answer
156 views

buzzer doesn't work at testing with DC power

i have a motherboard buzzer HYCOM mod:HY-05 i am trying to make it sound by providing 3 to 8 vdc as it says in the data-sheet but still no voice coming and i have also a buzzer KC-1206: still got ...
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0answers
43 views

Piezo and speaker

I have a question. I have not tested this circuit yet, but I am sure it works, my friend did. He used a 8ohm speaker as it is shown in circuit diagram. I want to make it a bit compact so I want to ...
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2answers
115 views

8 Candidate Buzzer Circuit

I am designing the following circuit for my college quiz club. I have replaced the bulbs BL1 to BL8 with suitable LEDs and ...
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1answer
224 views

Piezo Buzzer datasheet question

I am designing a circuit with a piezo buzzer. I want to use one that I can attach directly to my uC output pin (no transistor). The question is, can I do it with this one? (PS1240P02AT) ...
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1answer
1k views

Piezo buzzer current consumption

In my DIY project I need to decide do I want to use piezo buzzer (for sonar-like device) or not. To decide this I need to calculate current consumption of this device. Parameters I was able to find in ...
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2answers
1k views

Switching Piezo Buzzer with a Transistor

I want to be able to switch a piezo buzzer with arduino without connecting it directly. I have wired the following circuit I found on the internet: The problem is that the voltage across the ...
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2answers
102 views

share eletromechanical buzzer between 2 mcu's?

I'm trying to 'share' a buzzer between 2 separate mcu's, one is on a multirotor flight controller (STM32 or Atmega328), the other is a module I'm adding that needs to use the same buzzer. diagram: ...
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1answer
165 views

What device would be the best for producing the loudest beep possible with the smallest size?

I need to have my device be able to produce sounds of at least two different frequencies, as loud as possible at around 3/5V. So far it seems like the best thing to go for would be a piezo speaker but ...
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1answer
147 views

Beep patterns generator

I would like to generate the following beep patterns using a piezo buzzer: Single long beep Two short beeps Single short beep Is there any specific chip I can ...
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1answer
1k views

Can I turn a Piezo Buzzer into an ultrasonic Mist Maker?

You may have been reading my questions for a project I am doing. This one is a bit off the wall - I purchased a small 'bottle-top-humidifier' off of amazon and opened it up just to take out the ...
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1answer
589 views

How to add buzzer to alarm system

I have an external LED on my alarm system (outside at my garage) that indicates the status of my alarm system. The LED is solid green when the alarm is off and all zones are closed (no movement). The ...
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2answers
3k 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 - ...
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2answers
2k 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
966 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
617 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
714 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
1k 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 ...
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1answer
688 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
5k 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
2k 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
2k views

How are electronic musical greeting cards made?

I remember that long time ago, when I was a kid (in the 80s) there was some electronic greeting cards that when open up, start playing simple tunes through a small piezo-electric speaker. A quick ...
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1answer
716 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 ...
2
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1answer
485 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 ...
12
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4answers
2k 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
915 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 ...
5
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2answers
3k 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 ...
5
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1answer
3k 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
5k 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
127 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
784 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
178 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
1k 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 ...
3
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1answer
5k 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
884 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
1k 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
663 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, ...
11
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7answers
3k 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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3answers
2k 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
2k 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 ...
4
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4answers
6k 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
5k 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 ...