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.
247
questions
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 ...
- 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:
...
- 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, ...
- 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 ...
- 133
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?
- 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 ...
- 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-...
- 686
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 ...
- 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 ...
- 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 ...
- 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 ...
- 23
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 ...
- 9
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 ...
- 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 ...
- 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 ...
- 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 ...
- 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 ...
- 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 ...
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 ...
- 11
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 ...
- 1,956
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 ...
- 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 ...
- 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 ...
- 39
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 ...
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 ...
- 245
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?
- 45
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 ...
- 103
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 ...
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 ...
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 ...
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 ...
- 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 ...
- 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 ...
- 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 ...
- 61
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 ...
- 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 ...
- 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 ...
- 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 ...
- 63
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, ...
- 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 ...
- 1
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 ...
- 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 ...
- 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 ...
- 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 ...
- 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 ...
- 21
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 ...
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 ...
- 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 ...
- 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 ...
- 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 ...
- 47