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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2answers
78 views

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

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 ...
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92 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 ...
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Is it possible to measure impact force using Flexible PVDF Piezoelectric Film?

If it is possible , should i use integrator circuit first to hold the signal then follow it by other signal processing signals (amplification and noise filtering ) ? , knowing that i tried to connect ...
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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 ...
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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 ...
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71 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 ...
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4answers
89 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, ...
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101 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 ...
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1answer
83 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 ...
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30 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 ...
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87 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 ...
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45 views

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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102 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 ...
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419 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 ...
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58 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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1answer
75 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 ...
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560 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. ...
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56 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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90 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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1answer
54 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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112 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 ...
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1answer
796 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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327 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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634 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 ...
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48 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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1answer
185 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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92 views

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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1k 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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3answers
143 views

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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1answer
326 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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1answer
397 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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287 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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1answer
3k views

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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341 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
198 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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1answer
313 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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501 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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528 views

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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83 views

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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3answers
465 views

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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1k views

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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2k views

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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1answer
248 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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1answer
544 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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5k views

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 ...