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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1answer
73 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 ...
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4answers
43 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
126 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 ...
3
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2answers
216 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 ...
4
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1answer
287 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
246 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
85 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
183 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 ...
2
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1answer
85 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
votes
2answers
166 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 ...
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votes
1answer
433 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
182 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
322 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
176 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, ...
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4answers
351 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 ...
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2answers
696 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
462 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 ...
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0answers
273 views
Best Speaker/Buzzer/Noise Maker for my project?
the project I am working on plugs into the headphone port of a cell phone and will be used over night. However, when you plug in anything to the headphone jack of a phone, the alarm gets rerouted to ...
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3answers
871 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
votes
3answers
950 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 ...
4
votes
2answers
302 views
Piezoelectric transducer drive circuit
I have a small (1/2"sq.) thin film piezoelectric transducer that I would like to use to test the frequency response of musical instruments. I want to be able to stick it on to any instrument , send a ...
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2answers
687 views
Low power way to make a sound
I'm designing a 3V button cell battery powered device. I want it to beep or click or just make any noise at some times just loud enought to be heard across the room.
I've made a prototype working on ...
2
votes
3answers
860 views
Can I supply a 12V buzzer with 18V?
I'm trying to make a little buzzer for my bike to sound occasionally to warn off bears. I have a 12V buzzer from Radio Shack (Cat. No. 273-065) and was wondering if I could run it off of 18V directly ...
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votes
1answer
464 views
Difference between NE555P and 555CN?
I'm working on a circuit that uses two 555 timers. At the electronics store, they gave me a handful of 555 chips, I only noticed the difference when I finished my circuit: the R1 value is shorted out, ...
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votes
5answers
956 views
Random time timer
I'm constructing a simple circuit that beeps a beeper on a given time interval, using a 555 timer. Is there any simple way to randomize the time on the 555 timer between two given intervals, say, any ...
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3answers
865 views
Piezo circuit issues
In my circuit I am seeing strange behavior from my piezo. I am driving a 4Khz (TDK PS1240P02BT) piezo buzzer with a BSS138K N-channel logic-level enhancement FET. The PWM output of my microcontroller ...
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4answers
291 views
Buzzer alarm problem
I've got an assignment to make some kind of alarm. When user presses the push button, 1kHz sound should be generated and outputted on some kind of speaker (I'll use buzzer).
That part I know how to ...
3
votes
1answer
268 views
Good explanations of audio piezo element behavior
Is there any description anywhere of how voltage, current, mass, momentum, and air interact in a typical audio piezo, and what sort of signal should be expected on the third pin of a three-terminal ...
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1answer
369 views
Electrical Characteristic of a piezo buzzer
I stumbled upon this piezo buzzer and I don't know how to interpret its specifications. What's the difference between
Rated Voltage (Vp-p Square Wave): 5Vp-p
and
Operating Voltage: 1 to 20 Vp-p
?
11
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1answer
2k views
What's the third wire on a piezo buzzer?
Most piezos I've seen have just two connections, but this type has three.
What's the third wire for?
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1answer
3k views
Driving piezo buzzer from MCU pin
Good day!
I'm looking for the right circuit to connect my piezo buzzer to MCU (STM8S in my case). I don't have a partnumber\datasheet for my particular buzzer, but I've found a number of similar ...
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2answers
1k views
What's the function of the diode in this driver connected to a piezo buzzer?
I can't remember the source of this image, but I found a similar image in an Ekulit catalog. One recommended circuit shows just a resistor in series with the piezo buzzer. But this one adds a diode. ...
