Questions tagged [piezo]

Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins) in response to applied mechanical stress.

Filter by
Sorted by
Tagged with
1 vote
1 answer
27 views

Unexpected low output from basic inverting OPA134 attenuation circuit

The circuit below is meant to attenuate a high output and high output impedance piezo electric guitar bridge pickup -7 dbV. The circuit models both the pickup output impedance and load of the cable ...
user avatar
  • 33
1 vote
2 answers
69 views

How to drive atomizer? [closed]

I'm trying to build my own diffuser with a piezo atomizer. I'm new to electrical engineering and don't really know what I'm doing. Reading the specs for the atomizer from the description it says: ...
user avatar
  • 161
0 votes
1 answer
49 views

Crystals - Works on the principle of piezoelectricity or inverse piezoelectricity

I've done google search on the working principle of crystals and piezoelectricity. Nothing explains the actual principle. Is it piezoelectricity or inverse piezoelectricity? From what I've understood, ...
user avatar
  • 2,406
0 votes
1 answer
61 views

How to figure out the current drawn by a 40kHz ultrasonic transducer?

I have some 40kHz ultrasonic transducers (the same type as which you find in the common Arduino ultrasonic distance sensors.) All information comparable to a datasheet I got was: I don't get how to ...
user avatar
0 votes
0 answers
37 views

Piezoelectric Harvester Circuitry

Can anyone tell me what type of circuit is used in this piezoelectric harvester? And if possible, could you also provide a diagram of it when connected to battery?
user avatar
  • 1
0 votes
1 answer
72 views

What Does This JFET Do If Vgs is Always 0V

I'm trying to understand this reference circuit that I found in the datasheet for a piezo accelerometer. I don't understand what the purpose is if the gate and source are common. My best guess after ...
user avatar
  • 3
2 votes
1 answer
88 views

Emissions issue with H-Bridge driving piezo transducers

I have the following block in a PCB design: This drives a ~ 5W piezo transducer at 113KHz. The functionality of the system is great, nothing heats up at all. The issue is when I did a quick pre-...
user avatar
2 votes
0 answers
29 views

How to determine LS, CS, RS, and CO of a piezo transducer for simulation?

I have a 24mm piezo transducer with the marking SSE2425TAL from overseas. There are no detailed specs nor graphs to get LS, CS, RS, and CO at various frequencies (but just 25 kHz is fine). I'd like to ...
user avatar
  • 259
1 vote
4 answers
174 views

Best way to reduce HF noise in OMA2134 op-amp preamp circuit

I have built the following electric guitar preamp which is mounted inside the instrument. The primary reason for doing is that there is a piezo pick up in the bridge with a very high output impedance ...
user avatar
  • 33
1 vote
0 answers
71 views

Increase voltage of a 1.6MHz frequency

I have a digital signal with voltage of 3V and frequency of 1.6MHz. How can I increase voltage of this signal to 36V? The signal is generated by PWM feature of esp32. EDIT: I'm trying to use this ...
user avatar
  • 111
0 votes
1 answer
133 views

Mist maker using a piezoelectric disk. How does this circuit make oscillations?

This video of Great Scott has been referenced many times here. The schematic he uses is this: The piezoelectric disk requires high oscillating voltage to work. This combination of L, C, MOSFET and ...
user avatar
0 votes
0 answers
43 views

How does direct piezoelectric effect convert mechanical energy into electrical energy?

I am studying direct piezoelectric effect and if I understand it well the idea of direct is that if we apply force in an hexagonal cell unit for example, we create a polarisation, but how do we ...
user avatar
1 vote
0 answers
26 views

How can we model the piezoelectric behavior of a capacitor to mechanical and thermal transients?

I would like to model the behavior of ceramic capacitor to thermal and mechanical stress. We are seeing power supply fluctuations during reliability test and suspecting the ceramic capacitors' role in ...
user avatar
  • 2,155
0 votes
0 answers
50 views

How do you generate an impulse signal in a mechatronic system?

Background: I have a piezoelectric force transducer that I am using to measure the force produced by a combustion reaction in a tube. The issue is that there is a lot of ringing that occurs during the ...
user avatar
  • 9
-1 votes
2 answers
82 views

Is it possible to create a piezo power generator? [closed]

Piezoelectric effect can be reversed. Hence suppose a crystal and a steel frame with a screw built in it. When putting pressure on the crystal via screwing, a tension should appear between both sides ...
user avatar
  • 99
1 vote
1 answer
128 views

Simulating IEPE powered sensor and current source

I am trying to create a simulation of an IEPE sensor circuit and get it to match measured behavior of something like a PCB 378B02 microphone connected to such a supply. IEPE sensor-side amplifier ...
user avatar
  • 229
1 vote
1 answer
88 views

How to measure output of a piezoelectric?

I have a (perhaps trivial) question that is buzzing me a bit these days. A brief explanation of the project: I have metallic plate with two piezoelectric sensors attached on each side. One is used as ...
user avatar
  • 11
1 vote
0 answers
94 views

How to measure the waveform of a piezo igniter?

Is there a (cheap) way to measure the pulse of commercially available piezoelectric igniters like those used in lighters or BBQ grills? I use them as a cheap (and very crude, for sure) method for ESD ...
user avatar
1 vote
3 answers
259 views

Impedance matching transformer for piezo acoustic guitar pickup

I am trying to determine the specifics (windings, wire gauge, core material) for an impedance-matching transformer for a piezo pickup on an acoustic guitar. If I can arrive at a 2 megohm input, 20 ...
user avatar
3 votes
2 answers
128 views

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 ...
user avatar
0 votes
2 answers
294 views

Buzzer differences and configurations

I want to understand the right way to wire a buzzer. I know there are passive and active as well piezo buzzers and magnetic buzzers. Also, a passive buzzer needs an external source while the active ...
user avatar
  • 127
1 vote
0 answers
80 views

step-up transformer design - basics

I want to step up Li-ion battery voltage to ~100-125V at ~145kHz and ~0.5Arms. (The circuit is to drive a small piezo at its ultrasonic resonant frequency.) I have limited space. Are there any rules ...
user avatar
  • 11
2 votes
1 answer
107 views

How large is a piezo buzzer's deformation?

For a standard run-of-the mill piezo buzzer (as in the image below), what order of magnitude would the deformation be (compared to 0V) that occurs when driving it within its normal operating ...
user avatar
0 votes
0 answers
71 views

Driving a piezo with digital input (I2S)

In a current project, I'm trying to chirp a piezo sounder in the 40 kHz range. So far, I chose the PAM8904Q piezo driver, which accepts PWM input. As it now turns out, my microcontroller cannot output ...
user avatar
0 votes
1 answer
164 views

Piezo connected to ESP32 - Why doesn't it kill the input?

I have a ESP32, and a piezo disk connected as a sensor: Piezo - to GND Piezo + to Analog In 50K Resistor in parallel to piezo My understandin is that the piezo generates a voltage when it is ...
user avatar
0 votes
1 answer
59 views

Could you please tell me resistor parallel with piezo PKLCS1212E4001-R1

Please could you tell me the reason why you add a resistor in parallel with a piezo?
user avatar
0 votes
0 answers
36 views

Generate vibration and sense with the same piezo

I would like to build a sensor that generates some vibration on a material and then sense the vibration of the material. The simplest approach seems like using a piezo transducer. Ideally in ...
user avatar
0 votes
1 answer
58 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 ...
user avatar
0 votes
0 answers
90 views

Can I use Op-Amps to drive a ultrasonic piezo transducer at 200kHz

I’ll admit I’m not the most knowledgeable guy when it comes to electronic circuits, so I thought I’d ask before breaking anything. I’m looking to drive a piezo transducer using a 200kHz sine wave. The ...
user avatar
0 votes
1 answer
178 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 ...
user avatar
0 votes
2 answers
86 views

How to surpress coupling between two circuits

I have the following setup: 2 piezo transducers are placed 0.7 meter apart from eachother in water facing eachother. 1 piezo (PA) acts as the sender, the other piezo (PB) acts as the receiver. PA ...
user avatar
  • 713
0 votes
1 answer
131 views

Easiest way to (quietly) drive a 2W 120VAC load (piezo air pump) from MCU-controlled 3V/5V/12V?

I'm trying to drive this piezoelectric air pump that requires 1.5W and runs on 120VAC 60Hz wall power. This will be controlled by a MCU/CPU of some kind (Raspberry Pi in this instance), so the control ...
user avatar
  • 103
2 votes
0 answers
165 views

CW Doppler probe for fetal doppler and blood flow velocity

I am currently working on a microcontroller based project to measure the blood flow velocity using ultrasound doppler. I have purchased two Spengler 8 MHz continuous mode probes in order to measure ...
user avatar
  • 135
-3 votes
2 answers
503 views

Can a MOSFET or transistor be used to switch on a 9V supply using a 3.3V signal?

***Technical question, not a wiring problem. I am building a bicycle alarm system and I'm a little stuck on the alarm output. I wonder if I am approaching this problem wrong. My alarm piezo ...
user avatar
0 votes
0 answers
42 views

Touch sensor selection

I am currently researching a touch/force sensor for my project. Purpose of this post is to get your help in sensor selection. Below is the information about the project so that you can get insight ...
user avatar
  • 261
1 vote
0 answers
55 views

Help Designing an Impact Detector for Raspberry Pi

I am trying to design a little game where you throw a baseball at a 3x3 grid of 24x18" polycarbonate panels (1/4" thick), and the game detects which of 9 panels is struck. I'm aware there ...
user avatar
  • 11
0 votes
1 answer
175 views

Reducing resonance in a piezoelectric ultrasonic transducer

I am using a piezo transducer to launch an ultrasonic pulse in air, at a frequency of 125kHz. A picture of the received waveform is attached. My question concerns how I can (electronically) limit the ...
user avatar
  • 12.1k
0 votes
1 answer
98 views

What is the use of drain diodes in the circuit below?

This TC7920 driver will be driving a piezo electric load which may behave like a capacitive load at certain frequencies. There is another IC TC8220 which is the same except it is not having the drain ...
user avatar
0 votes
1 answer
72 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, ...
user avatar
  • 1,987
0 votes
1 answer
103 views

Amplifier circuit for Bently Nevada velomitor 330525

I'm in need of measuring vibrations and I have access to these Bently Nevada velomitors. I'm not sure how to design a ampliefier circuit for the signal. The datasheet is says that it is a piezo ...
user avatar
0 votes
4 answers
140 views

LTSpice sweep resistance

I would like to plot the power obtained by this simple recovery circuit (UR1eff^2/R1) according to the value of the resistance R1. But as it is a sinusoidal function, it takes the average value of the ...
user avatar
  • 11
1 vote
0 answers
96 views

SSHI circuit on LTSpice

I've been trying to get an SSHI circuit running on LTspice for several days now (see below schematic). My problem is the following: the simulation (.tran) stops after a hundred milliseconds. Being a ...
user avatar
  • 11
2 votes
0 answers
50 views

Turning on a latch circuit with a piezo sensor?

I am trying to build a relatively 'simple' circuit with a piezo sensor that turns on an LED for ~10-20 seconds after it has been tapped. In the off-state the circuit should use zero current to ...
user avatar
  • 21
1 vote
2 answers
383 views

Piezo signal amplifier using LM358 opamp

I was trying to amplify the signal of a piezo, which is very low and amplify it so that I could use it to latch a flipflop. I had the LM358 opamp so I made a differential amplifier by a gain of 50 so ...
user avatar
  • 13
0 votes
3 answers
140 views

protect op amp input from overvoltage from piezo sensor

I use a piezo to register the moment of a knock via a micro controller's analog in (1.8V Max) So far I used the scheme in the figure without any diodes. This works so far, but depending on the knocks ...
user avatar
1 vote
0 answers
48 views

Piezo cantilever energy harvester: how to mesure such small power?

I am currently designing a piezo energy harvester and I would like to modify the resonating frequency to maximize the energy recovered(for exemple by changing the center of mass of the cantilever). My ...
user avatar
3 votes
2 answers
985 views

Protecting circuit from piezoelectric disc voltage spike

I have a piezoelectric disc, and I'm trying to use to build a primitive sonar. I connected the disc to an oscilloscope and if I press very hard on the disc, I see that the voltage can spike pretty ...
user avatar
  • 335
1 vote
2 answers
176 views

Stick-Slip Piezo Linear Stage Driver - Prevent the Load from Changing Driver Output?

I am currently trying to develop a circuit that generates ramp waveforms to control the motion of a piezo linear stage. Specifically, two waveforms need to be possible to output: a slow ~250us upward ...
user avatar
  • 89
2 votes
1 answer
163 views

Does the type of preamplifier used for a piezoelectric sensor change its physical resonant frequency?

Two common amplifier circuits used for piezoelectric sensors are voltage amplifiers and charge amplifiers (pictured respectively). With the charge amplifier, the sensor is shorted but this is not the ...
user avatar
  • 111
1 vote
1 answer
839 views

Is this design of a charge amplifier for a piezoelectric sensor correct?

This is the specifications that must be met: "Design a charge amplifier for a piezoelectric sensor that has 500 pF capacitance. It should pass frequencies from 0.05 to 100 Hz so that it can ...
user avatar
  • 47

1
2 3 4 5