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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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 ...
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1answer
68 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 ...
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1answer
34 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
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2answers
84 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 ...
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2answers
66 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 ...
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1answer
33 views

piezoelectric sensor

i am working on piezoelectrics sensors.now after converting the voltage from ac to dc i need to store it in a btttery so that i can further use it as any charging device (THATS later part).Now i need ...
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3answers
131 views

12-15V short beep sound simple circuit?

I need to implement the short beep sound at PSU being switched On/(Off - if easy). Are there any simple circuits for this problem? The piezo buzzers are preferable of their size and PCB mountable ...
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2answers
46 views

Do I need to isolate the power to buzzer circuit from other sensitive circuit?

I am planning to add a buzzer circuit, which will share the power plane with a micro-controller. Do I need to add a choke or so to isolate the two components? If so, how should I do it? Thanks in ...
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2answers
129 views

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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1answer
43 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 ...
0
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3answers
80 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
63 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
127 views

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

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 ...
0
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2answers
878 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
224 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 ...
2
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1answer
124 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
232 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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2answers
167 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
267 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
2k 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
108 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
196 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
173 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
2k 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
697 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
3k 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
1k 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
714 views

noTone() and tone() are not implemented for the Arduino Due [closed]

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
782 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
2k 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 ...
5
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1answer
809 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
6k 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 ...
2
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1answer
1k 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
527 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
1k 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
votes
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
votes
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
128 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
859 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
187 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
6k 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
955 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 ...
1
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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 ...