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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.

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Ultrasonic Piezoelectric Pulse Amplification

I am working on a project that is going to use an IC similar to the Maxim MAX35103. I have not decided on the exact IC yet, but for ease of this discussion, we will assume the MAX35103. This MAX35103 ...
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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 ...
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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 ...
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57 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 ...
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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 ...
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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. ...
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Measuring vibrations of breathing

A newbie question. I have a somewhat unique idea that I am trying to understand if it is feasible or not. I would like to measure the vibrations of the nasal passage of the horse as it breathes at ...
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47 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 ...
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74 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 ...
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50 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 ...
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Relation of pressing the piezoelectric transconductor and its output voltage

Is there a formula of pressing piezoelectric transconductor (stress) and its output voltage?I remember my classmate told me Output voltage =Young's modulus*strain...,but this formula is not complete
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Calculate effiency of power harvesting circuits

Bellow figure shows my implementation of Parallel-Synchronized Switch Harvesting Interface (P-SSHI) circuit. I want to calculate this circuit's efficiency but I don't know how to calculate this kind ...
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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 ...
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Possibility of generating some useful electricity from Piezoelectric disk transducers

Is it possible to create efficient and useful energy using Piezoelectric disk transducers. I am thinking to use disk type transducers in Shoes and then harnessing this energy using rectifiers or by ...
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Piezoelectric transducer to bluetooth transmitter

I understand that it is common to use microcontroller such as arduino to read in sensor input from the piezoelectric transducer and convert the analog to digital data and send it to the bluetooth ...
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550 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. ...
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Impedance match piezo-crystal and generator

I am using Texas Instruments TDC1000-7200 evaluation board and a pair of piezo-crystal transducers to measure flow in pipes by sending out ultrasonic Tx pulses at 1Mhz and receiving the echo on Rx. ...
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214 views

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

Can I develop constant force (pressure) from piezoelectric crystal applying constant voltage?
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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 ...
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46 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 ...
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148 views

TrackPoint a.k.a pointing stick 2-axis force sensor

I have an application that would benefit from a sensitive two-axis force or bending torque measurement very much like what a pointing stick (a.k.a. TrackPoint) used to do in a ThinkPad, apparently ...
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Piezoelectric effect in cables?

I am using a very sensitive transimpedance amplifier on a 3m long cable to a photodiode. Signal levels are about 70 nA - 700 nA. Bumping into the cable causes a large voltage spike on the output of ...
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What technology exists that could activate a small circuit upon high acceleration/impact?

The circuit will fit inside a 12 gauge shotgun shell, be fired from it (with less gunpowder), and will have DC batteries. I'm wanting to conserve battery life until the shot is fired. When fired, I ...
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687 views

Parallel coupling of piezoelectric

I'm trying to couple multiple piezoelectric discs as parallel to get electrical energy through vibration. using LTC3588 rectifier , which way is correct: wiring all piezo parallel,then connect output ...
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Electrical power in piezoelectric transducer

This question is from the book Diagnostic Ultrasound Imaging: Inside Out By Thomas L. Szabo, regarding the power flowing into the piezoelectric ultrasound transducers. In chapter 5 (transducers) page-...
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Help with modelling a piezo

I'm using the Van Dyke model from this article and I'm a bit lost on a few things. Since the only nodes I can physically connect to are the ends, can I assume that I am limited to the voltage across ...
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Driving piezoelectric crystals, low to high or matched impedance?

When designing an interface between a fixed frequency RF generator and a piezoelectric crystal, should the aim be to match the load impedance to the source impedance (for maximum power transfer). Or ...
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192 views

Make high voltage spark travel further?

Okay, so I have this piezoelectric barbecue igniter so that I can make a remote igniter. The problem is that if I add a length of wire the spark becomes very small. Is there any way to make the spark ...
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434 views

Maximum power and current generated from piezoelectric material

I have an application which is a steel cylinder has 20cm OD, 8cm ID and 3m length. It has an axial load of 400KN, temperature 90c and affected by about 100KN radial force. I want to redesign it with ...
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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 ...
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240 views

By increasing the size of the piezoelectric ceramic disc used in ultrasonic humidifier, does it increase the amount of mist generated?

I'm fairly new to piezoelectricity and I have managed to research online on how ultrasonic humidifiers work. However, there has been very little mention on the size of the piezoelectric ceramic disc ...
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Maximum Resonant Impedance of a piezo disc

I have a couple questions regarding piezo discs. I have done research on resonant impedance and somewhat understand it. What I am still confused on is whether or not the MAX resonant impedance would ...
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1answer
286 views

RPi Pressure Sensor using Piezo Transducer

I am trying to make a pressure sensor to use with my raspberry pi zero. I would like to avoid making another purchase, so while an ADC or FSR would be easier I would like to figure this method out. ...
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1answer
172 views

Ungenerated Voltage across the DMM and random spikes across the Oscilloscope

I am working with piezoelectric material known as PZT-P-43 MY PZT datasheet (please look at the red outlined). So far I have been trying to find the Energy that is being delivered to my 100uF ...
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258 views

Driving Ultrasonic Transducer

Because my system needs higher power for the ultrasonic transducer, I need to drive the transducer with higher voltage. I came up with following ideas driving transducer with 10V peak to peak voltage....
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424 views

How to simulate P-E loop of a lossy capacitor?

I want to simulate the P-E loop for a lossy capacitor (figure 1c below). For this purpose it's enough to plot the charge Q across the capacitor vs. the voltage V across the capacitor because \$P \...
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Pressure sensing controller using Stress Ball

I am thinking of a project proposal for my robotics course and we are required to make one that has a potential application on physical therapy or medical fields. One thing that came across my mind is ...
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piezoelectricity [closed]

By knowing some of the features of piezoelectric sensor, I want to know more about this sensor. how does it actually works? Does it require application of pressure and releasing that pressure often to ...
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5k views

How can i make a ceramic piezo operate at a specific frequency?

I recently just ordered several ceramic piezos used to aerosalize water and essential oils.http://www.aliexpress.com/item/Free-shipping-20mm-atomization-chip-board-dedicated-ultrasonic-atomization-...
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Piezo contact mic into iMac - avoid signal spikes

I've wired an external piezo as contact mic to the TRRS 3.5 jack of an iMac and it is working fine - BUT the signal will just randomly stop after hitting the contact mic several times too hard, so I ...
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Piezoelectric vibration energy harvesting

Recently I'm working on a project aiming to convert the vibration of sound waves into electricity to charge batteries using a piezoelectric material (MFC type). I was trying to use the human voice as ...
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Many small and cheap linear actuators [closed]

Me and my friends are trying to build a linear actuator matrix. It's supposed to be a grid of pins that go up and down at reasonably fast speed (more than 1cm/s, the faster the better). Problem is, ...
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Converting small AC output voltage of a piezo element to DC without IC

I've been trying to find a AC to DC converting circuit that will take a piezoelectric crystal as its input. I have the piezo to a bridge rectifier but all the diagrams I am finding have some kind of ...
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238 views

Setting up piezo pump with arduino

I'm trying to control a 12V piezo pump (with an inbuilt driver) and I'm a bit unsure how to use it safely. I'm using an Arduino Uno to control it, with an N-channel MOSFET rated at 60V 30A (with a 10K ...
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526 views

Piezoelectric Transducer, effect of voltage amplitude vs frequency of pulsing signal?

I am not an expert in piezoelectric transducers used for ultrasound applications so I am looking for some insight into the matter. To extract the greatest amount of acoustic energy from the ...
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Quantifying the piezoelectric effect of ceramic capacitors

In comparing ceramics vs tantalums one of the oft cited disadvantages is the tendancy for ceramics to exhibit a piezoelectric (i.e. microphonic) effect. Old-school technicians talk about ceramic ...
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Is this a possible design of Triggered Spark Gap?

I am trying to make a triggered spark gap for discharging capacitors (around 470uF, charged to 300-400V), for entertainment purpose. I have searched for triggered spark gap designs, but I am not sure ...
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3k views

How to improve the sensitivity of a piezo assembly?

First and foremost I’d like to warn you that I’m not a native English speaker. Sorry in advance for my mistakes. And also I’m kinda a newbie in terms of electronics; so go easy on me please, I will ...
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1answer
338 views

Piezoelectric pressure sensors

I'm currently working on designing a circuit that will utilize two piezoelectric stacks (5mm x 5mm x 20mm Parker stacks) that are loaded into a housing in parallel mechanically. The circuit I'm ...
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1answer
510 views

dual piezo pickup

I experimented with different types of piezoelectric disks as double bass pickups and found two that picked up different parts of the frequency spectrum decently. The specification of the two piezos ...