Questions tagged [piezoelectricity]

A physical effect that translates mechanical stress to generated voltage. It is a reciprocal effect, so the application of voltage can induce stress/strain. Used for speakers/microphones, load cells to measure weigh and most commonly in strikers for igniting BBQ's and lighters. A common material the exhibits this effect is quartz.

Filter by
Sorted by
Tagged with
0
votes
3answers
155 views

Can I safely turn a standard computer PSU into a 220VAC to 36VDC converter?

I'm a mostly electronics noob, and wanting to be safe. I am wanting to build my own fog machine, using some piezoelectric discs that I believe work best with 36v (I'm guessing this from looking at ...
0
votes
1answer
42 views

Mimicking the output of a piezo sensor with a membrane potentiometer

High level I'm trying to use an electronic drum pedal as an electronic drum trigger. My specific e-drum unit has only one pedal input, so I need to repurpose a drum trigger input in order to use more ...
0
votes
1answer
94 views

Do almost all modern smartphones use piezoelectric speakers?

Do almost all modern smartphones use piezoelectric speakers for both the ear speaker and the speakerphone speaker? The reason I ask is because I rinsed off my waterproof smartphone (which I've done ...
0
votes
1answer
51 views

Piezoelectricity question

If I have a piezoelectric crystal and apply pressure to it , it will be deformed and a voltage between its 2 ends will be generated. Is the voltage generated due to its deformation or due to the ...
0
votes
0answers
19 views

Use a Passive High Pass filter to filter out voltages from piezocrystal under a certain threshold

I have a piezo crystal (SEN-10293, datasheet: 7BB-20-6L0) that I am using to detect if a person sits on a chair. The compression of the crystal generates enough voltage to wake up a microcontroller ...
0
votes
1answer
38 views

What are the advantages and advantages of ceramic and Langevin transducers for ultrasonic cleaners?

I have an old large ultrasonic cleaner with 5 ceramic piezo electric transducers (pictured below) epoxied to its tank's underside. They use around 40W of power each. Newer ultrasonic cleaners, ...
1
vote
2answers
212 views

Help with piezoelectric circuit [closed]

I connected three piezoelectric sensors to a rectifier which was further connected to a capacitor (100µF). I kept hitting the sensors for some time, and measured the voltage across the capacitor using ...
-1
votes
1answer
53 views

Power produced by a piezoelectric transducer

When we increase the size of the piezoelectric transducer will this increase the output too? For example, a small piezoelectric disc produces 2V and makes a small LED bulb flicker or light for just a ...
1
vote
0answers
78 views

What is being depicted in these piezoelectricity circuit diagrams?

I am currently studying Ultrasonic transducers – Materials and design for sensors, actuators and medical applications by Kentaro Nakamura. Chapter 1.2.2 Piezoelectricity says the following: ...
0
votes
2answers
78 views

How would you apply high voltage on a piece of dielectric making sure breakdown does not occur?

Say you have a piece of dielectric with a breakdown electric field, BDE. For some experimental requirement you have to apply an electric field, E > BDE, across the piece of dielectric without ...
0
votes
1answer
35 views

Ceramic pressure measurement - capacitive or piezoelectrical?

Context: I'm writing about an old industrial training facility used for a petrochemical process. In this training facility, there is a 3-phase separator. On that separator is a pressure measurement. ...
0
votes
2answers
107 views

The Piezoelectric Effect on Natural Quartz Crystals

Background I have recently started doing a lot of research on the piezoelectric effect with the hopes of gaining a better understanding of the topic. When I can I like to do experiments on top of ...
1
vote
1answer
40 views

Driving piezo scanner tubes using the driven internal electrode configuration

I'm planning on doing a project involving a piezo tube scanner (PTS). The PTS will be used for 3 axis manipulation of a sharp needle. PiezoDrive has a few scanners and some info on how to use them. ...
0
votes
1answer
96 views

Is it possible to drive a power piezoelectric in lower frequency than its own frequency?

I am driving a piezo transducer simply by an inductor series with piezo. the resonant frequency of the piezo is about 40KHz and I designed a 20KHz transducer. I'm giving a pulse voltage (using a class ...
0
votes
1answer
207 views

What happens when DC is applied to a piezo crystal?

I've heard that when an alternating current is passed through a piezo crystal it vibrates. But what happens if a direct current is passed through the crystal? I'm assuming depending on the direction ...
0
votes
0answers
34 views

Do active PZT audio buzzers (with built-in driver) create dangerous spikes on power supply?

I am planning to add a active piezo element audio buzzer with built-in driver (BESTAR BPT-14X or LOUDITY LD-BZEL-PB04-1408 ) to my recent quite complex MCU project. These buzzers come with built in ...
0
votes
1answer
70 views

Why does the output voltage after full bridge drop so many?

recently I am researching the piezoelectric transducer (PET), which can convert the mechanical energy into electricity. And I found a strange phenomenon. I used the 10MΩ probe of oscilloscope to ...
0
votes
1answer
95 views

How to drive a piezo transducer

thank you for taking your time to read, im hoping someone can help me out! I am looking to drive a piezo transducer at its resonant frequency(20khz) to generate sound waves. I am doing an application ...
0
votes
1answer
610 views

Basic of a charged piezo : pC/G, mV/G, Signal analysis

This is the first time I use a High impedance piezo sensor and the problems went pretty quickly. Here is the piezo I used : Manufacturer part number : PKGS-00GXP1-R Rating : 0.35pC/G (+/- 15%) ...
0
votes
2answers
166 views

Piezoelectric dilemma!

I am a high school student and have no experience with piezoelectricity but I’m working on a piezoelectric shoe. My plan, initially, was to connect piezoelectric transducers in parallel and solder ...
0
votes
1answer
135 views

Can I charge a lipo battery using piezoeletric energy harvesting?

I use a 9V 800mAh lipo Okcell battery to power my ESP8266 ESP-01 with a voltage regulator to change it to 3.3V. I use the ESP to detect the voltage peak from a piezoelectric when someone is running to ...
1
vote
1answer
99 views

Piezoelectric showing strange, slowly fluctuating periodic background noise

We are trying to detect mice's licking using a piezoelectric attached to a metal spout tube that delivers water. It's kind of working in the sense that we can detect licking, but it suffers from ...
0
votes
1answer
144 views

Very confused regarding parallel resistors limiting current

I'm an electronics noob trying to understand this Arduino circuit below. Having very cursory knowledge of electronics, I'm extremely confused by this statement I took from the Arduino Knock example: ...
0
votes
1answer
70 views

What is equivalent of C0 in mechanical system?

In this picture write all their equivalent Body in mechanical system and electrical circuit for a piezoelectric. What is equivalent of C0 in mechanical system?
4
votes
0answers
91 views

What is the relation between resonance frequency and piezoelectric charge coefficient?

We know that the maximum power is lost at the resonant frequency,where the impedance is minimal. On the other hand, when the impedance is minimized, the charge coefficient is maximized. In resonance ...
0
votes
1answer
676 views

Piezo electric water vaporizer [closed]

I'm interested in a module that I've seen today and is a cold water vaporizer. I turns water to steam without heating it. Anyways this module needs kind of oscillating circuit to work properly and ...
0
votes
2answers
68 views

uC-adjustable harmonic oscillator circuit @100W

I'm looking for a circuit that performs a harmonic oscillation while its resonance frequency can be controlled with a microcontroller (preferably via an analog signal). The circuit has to drive a set ...
0
votes
2answers
91 views

Smart tires idea: How to measure electrical output of piezo arrays? [closed]

I had an idea where you take piezoelectric material and insert it into/on tires (or tire sleeve), suspension components, bushings etc of automobiles and then store the electric energy generated to ...
0
votes
1answer
511 views

When oscillating a piezo, should I use AC or DC square wave?

I have several piezoelectric stacks that I am trying to get to shake/oscillate. An example of what I mean by piezoelectric stack is something like Thorlabs PA3CEW. The drive voltage is specified as ...
5
votes
0answers
190 views

Is it possible to power a MCU with a button press / touch? [closed]

I hope to use a piezoelectric button to harvest and produce a sufficient energy burst to power ON and bootup a MSP430 for a few ms enough to update a simple data structure (e.g. two integers stored in ...
1
vote
0answers
155 views

Should a piezoelectric sensor be modeled as a voltage or current source?

I know that one can do source transformation between current and voltage source. But take a DC power supply, and we usually model it as a voltage source because the voltage is constant even the load ...
0
votes
1answer
174 views

Read data from strain-gauge Labjack, Arduino

I am working on a project where we have to record breathing data. For that we ordered a LabJack U3-LV along a with an amplifier (datasheet) and a belt which is some kind of strain gauge I think. We ...
1
vote
4answers
2k views

quartz crystal oscillator applied voltage

I know that in quartz watches a quartz crystal is used to keep time by counting it's vibrations, caused by the voltage applied to it. I don't understand if this voltage is DC or AC: If DC is used, ...
1
vote
0answers
371 views

How can I change a DC current to a 1.7/2.4 MHz AC current for piezoelectric device

I would like to start by saying my experience in electronics is very limited and I will include pictures of everything. I am, however, trying to assemble a device which puts a current through a ...
1
vote
1answer
411 views

Replacing a magnetic speaker with a non-magnetic one

I need to mount a speaker next to a magnetic compass. Any suggestions? I have a becker radio which comes with a traditional 4 ohm moving coil magnetic speaker. Due to space limitations I don't really ...
0
votes
1answer
105 views

Charge Measurement for Piezoelectric Sensor

I want to measure the charge displaced by a force acting on a piezoelectric sensor. The problem is I don't know the sensor so I have no idea how big the current generated by the sensor may be nor what ...
0
votes
0answers
544 views

Help identify a water level sensor in humidifier

I have this ultrasonic humidifier that looks like this: It has a piezoelectric transducer that produces the vapor. It also has a sensor that turns it off when the water runs out. The unit now just ...
0
votes
1answer
835 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 ...
5
votes
3answers
2k views

What actually is the load capacitance of a quartz crystal?

I'm having hard time understanding the principles of piezoelectric crystal oscillators. I've found this picture: I understand that "load capacitance" is something you have to connect to a crystal. I ...
0
votes
1answer
71 views

How can I limit the voltage of a circuit so that it is always between 8 and 15 volts?

I am currently working on a project in which I am using piezoelectric material to charge a battery. The voltage output of the piezoelectric material is variable depending on how much mechanical energy ...
2
votes
2answers
163 views

Thin plate piezoelectric transducer glued to flat surface in shear mode

I want to glue a piezo plate looking like in the image below such that the wide surface of the plate gets glued onto a flat surface. The image is part of the datasheet from here. If I apply an AC ...
5
votes
2answers
1k views

How can a signal itself have a high impedance?

Observation: Recently I worked with a piezoelectric sensor and read that the sensor itself has a high impedance. Because of this, an op amp of high impedance was required to amplify the signal. ...
0
votes
1answer
110 views

Piezo impact detection

I'm creating a Nerf gun target with Arduino for my little brother. To detect the impact I was thinking about using piezo's. They would be located on the back of the targets (alimunium plates that do ...
0
votes
5answers
298 views

A sensor which can measure the vibration of a material

I am planning on making a musical instrument where I require the conversion of vibration of a material to voltage. The idea is to make a percussion instrument where I hit a plate made of a certain ...
0
votes
1answer
62 views

Anomolous behaviour when taking ADC readings

I'm using ADC on my STM32F407 to read the signals coming from a piezoelectric sensor. I have written my code in such a way that if input crosses a certain threshold, it starts sampling and storing it ...
6
votes
1answer
160 views

GaN & SiC piezoelectricity problematic?

I read that galium nitride and silicon carbide are piezo materials.Does this cause some problems? I can imagine that unwanted piezoelectricity directly in the circuit path would cause some kind of ...
1
vote
1answer
1k views

Sensor to check if door is locked [closed]

I’m taking a subject of entrepreneurship and we have to present an idea to put in the market. My group thought about a keychain with a little light that warns us if we locked our front door or forgot. ...
1
vote
3answers
595 views

Can I develop constant force (pressure) from piezoelectric crystal?

Can I develop constant force (pressure) from piezoelectric crystal applying constant voltage?
0
votes
3answers
2k views

Is it possible to create a voltage divider without resistors?

I'm prototyping a chromatic guitar tuner with an Arduino DUE and a piezoelectric sensor. I was trying to amplify the sensor's signal and connect it to the Arduino's ADC pin. So I referred TI's ...
0
votes
1answer
53 views

7MHz Transducer Measuring Doppler Shift

I am currently messing around with a project I thought would be fun but am having some issues. My goal is to use a signal generator to send a wave through my 7MHz (Steminc) piezo s-configuration ...