Electrical Engineering Stack Exchange
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Questions tagged [piezoelectric-effect]

Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress.

Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress.

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About the audible noise of capacitor

All dielectric materials deform under the stress of an electric field, it's called "electrostrictive effect". And some dielectrics exhibit an additional piezoelectric effect, such ceramic capacitors, but the dominant mechanism is piezoelectric…
diverger
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Circuit feedback with mutual inductance on a toroid

I have been reviewing a circuit for the past few days and I am hoping to get some feedback to verify my thoughts as to how the circuit is working. This is a driving circuit for an ultrasonic cleaner and I am trying to figure out how to improve…
user114092
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What drives mechanical piezo device ultrasound maximum (sound) power output - electrical power or voltage?

Many definitions of piezo devices say that they convert mechanical energy to electrical (voltage) potential energy. This gives the impression that you want a high voltage to drop onto piezo device when driving it from an amplifier. How do I drive…
EMCInduction
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Can I increase the inductive component stored-energy of a Piezo Buzzer?

In this example of a model for a piezo element, there is an inductive component (I think this is a quartz crystal model -- it should not matter for the question. This graphic was also used here and here): As the piezo vibrates, there are two forms…
MicroservicesOnDDD
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How to check if the piezoelectric sensors are working properly?

I am performing an experiment where 4 piezoelectric sensors are placed diagonally at the corners of an aluminised kapton foil, which is attached to a frame. The sensors are attached at 45 degree angle (approx.) and the midpoint of the sensor is 55…
lqope54
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Piezoelectric Voltage and current measurement across a 3.3kohm resistor.

I am testing a PZT 43 material with tapping sequence. The measurement of the material is: 10mm in length and 0.8CM in diameter. I am tapping the material with a plastic and holding it down with a fat-glove to ensure that no other materials…
imad
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Driving piezo speakers in the simplest manner

I have a few options for the frequency generator side (25-35 Khz). Namely the NE555 or Arduino are some options. These outputs are minimal and I intend to drive the piezo X 4 Vp-p 12 V. Is the MOSFET the best option on this side? Please any…
Cameron Lee Cameron
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Voltage generated by piezoelectric effect

When you apply a voltage to a insulator if the insulator is shaped appropriately its shape is changed. When the piece of insulator returns to its initial state a voltage is generated by which is its polarity compared to the original voltage?
Se1fie
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Fast knock detector circuit with digital output

I am trying to design a fast, simple circuit that will send a short (~2ms) logic-level pulse (either high or low, don't care) to a micro controller, every time a Piezo Transducer detects a knock. The circuit needs to have as few components…
Marchingband
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Ultrasound transducer at different frequencies

An ultrasound transducer is specified to have two standard frequencies; 820 KHz, and 2.5 MHz, does this mean that any frequency in-between can be used? If not, what would happen if a generated signal with a different frequency, let's say 1.5 MHz,…
Keine
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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 an input, but theoretically it was not enough, so…
jumana haimour
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Self Drive Piezo Element/Self Excited Piezo Element Circuit

I have a self drive piezo element/self excited piezo element that I want to resonate at about 1-2kHz. As of my understanding, by using a circuit like in the figure below, the element will resonate at its eigenfrequency (the frequency with the most…
eidetech
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Generating 50-300 Hz oscillations with piezoelectric stacks

I am currently working on a project that prompts me to find/design sources of mechanical oscillations, similar to the ones generated by a motor with an eccentric load used in mobile phones and similar hand-held devices, but of specific dimensions…
APasagic
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Help with piezoelectric circuit

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 a multi-meter. It displayed the voltage to be…
Infiniticity
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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: Piezoelectricity means electricity derived from pressure…
The Pointer
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