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.

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35 views

Break beam sensor to replace piezo transducer

I have a device intended to sound an alarm and flash a bright light when it detects a phone ringing (so you can hear the phone ringing in noisy environments like workshops). I want to repurpose it to ...
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30 views

How to drive a piezo transducer

thank you for taking your time to read, im hoping someone can help me out! I am looking to drive a piezo transducer at its resonant frequency(20khz) to generate sound waves. I am doing an application ...
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56 views

What is the ampere of a piezo material

The voltage generated by piezo materials varies but does ampere also vary? Are there any sources where I can find this out? I might add that I’m not so much at home in the electrical world but I’m ...
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36 views

Potentiometer volume control for a piezo buzzer in bridge (2-pin) configuration

I have a 10K potentiometer that I'd like to use to control the volume of a piezo transducer/buzzer, which is driven by one or more MCU PWM-capable pins (ranging from 0 to 3.3V). Originally, my ...
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38 views

Can electrodes be used to transport currents generated by piezo crystals floating inside conductive gel

I have an idea and want to know if this is feasible. The idea is to put little piezo PZT crystals inside a conductive gel, the gel itself is contained by a membrane which receives stress from outside ...
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72 views

How can I electronically generate a signal similar to the one produced by striking a piezo?

I feel like this is a bit of an unusual request so I'm having a hard time figuring out how to research it. My question is: is there some way that I can use an Arduino to programmatically generate a ...
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59 views

How to use a Piezo ShockSensor and an op-amp practical integrator?

I have made this circuit : Once I apply a shock to the sensor, I get this result on the scope : CH1 (yellow) : piezoshock output CH2 (blue) : LTC6240 output Here is the spec of the piezo sensor : ...
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69 views

Basic of a charged piezo : pC/G, mV/G, Signal analysis

This is the first time I use a High impedance piezo sensor and the problems went pretty quickly. Here is the piezo I used : Manufacturer part number : PKGS-00GXP1-R Rating : 0.35pC/G (+/- 15%) ...
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1answer
74 views

Cascading inverting op amp for increased gain and low noise on piezo contact microphone

My aim: To create an amplifier that amplifies the output a piezo microphone with low noise and very high gain. Much higher than regular piezo amplifiers for musical instruments, I am doing underwater ...
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1answer
29 views

piezo element vs accelerometer

I'm looking at options to detect forces applied to a car door. An accelerometer seems by far like the most popular option, but I was also considering placing several piezo elements inside the car door,...
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1answer
69 views

Can I charge a lipo battery using piezoeletric energy harvesting?

I use a 9V 800mAh lipo Okcell battery to power my ESP8266 ESP-01 with a voltage regulator to change it to 3.3V. I use the ESP to detect the voltage peak from a piezoelectric when someone is running to ...
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25 views

SMD piezo solution for pressure/vibration sensors

I've been working with piezo discs for simple applications (i.e. detecting touch/knock, where different levels of intensity can be read). For large production, stripping wires and hand soldering ...
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30 views

Demultiplexing analog fast signal for 2-axis piezo movement

I am driving a 2-axis stick-slip piezo stage. Currently, I have two controllers, one for each axis. However, I would like to know how can I reduce it to a single controller? I need a sort of a ...
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88 views

Is this circuit for driving a piezo buzzer correct?

I'm designing a board which will feature a small SMD piezo buzzer which will be used for generating tones of varying frequencies from a PWM signal. I'm looking for a simple circuit which will be safe ...
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70 views

How to create a mechanical vibration?

I need to create a system which will make vibrate horizontally a plastic tube of diameter 4cm, of height 3cm, which axis is vertical, and whose weight is 11g. The frequency should be modifiable ...
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56 views

Help finding a suitable transformer

I have built a circuit that can drive a 3.3v AC output at a few hundred mA. The wave has a frequency of 150Khz. I want to step this up to 60-90v at ~0.5 Watts to drive an ultrasonic piezo. However, I ...
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85 views

Piezoelectric showing strange, slowly fluctuating periodic background noise

We are trying to detect mice's licking using a piezoelectric attached to a metal spout tube that delivers water. It's kind of working in the sense that we can detect licking, but it suffers from ...
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2answers
109 views

How to protect an op-amp against high inrush current following a high input voltage pulse?

I have a circuit where I'm amplifying the output of a piezo transducer with an op-amp. By taking some readings, i've found that the piezo can output fairly high voltages when struck hard (~20V), and ...
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1answer
43 views

A circuit with a non-inverting op-amp and comparator for amplifying the output of a piezo transducer. Am I missing anything?

I'm a total noob when it comes to electronics so was hoping some people might be able to take a look at my circuit and see if it makes sense. I'm trying to create a circuit which amplifies the puny ...
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1answer
66 views

How to draw ~1A from Li batteries without damaging/over-stressing them?

I have designed a micropump driver powered by 2x AA (Li) batteries, the pump is piezoelectric and requires 27V. The pump requires a switching waveform, at the battery side this draws (including ...
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119 views

Driving a piezo speaker at 40 KHz

I'm trying to drive this piezo element at 40 kHz but am running into troubles when using a function generator since the element requires greater drive. I got the guts of an ultrasonic cleaner to ...
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1answer
81 views

(Assumed passive) piezo buzzer makes sound upon shorting leads?

I found a piezo buzzer in an old circuit board. It's (literally) a black box, size of a big coin, maybe 0.8 cm thick, 3 cm across, and a red and a black wire coming out. When I short the red and black ...
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MEMS piezoelectric sensor circuitry

I have a question what exactly does a MEMS piezoelectric sensor chip contain. Does it contain the sensor element alone (or) also the signal conditioning circuitry for the MEMS piezoelectric sensor as ...
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2answers
55 views

uC-adjustable harmonic oscillator circuit @100W

I'm looking for a circuit that performs a harmonic oscillation while its resonance frequency can be controlled with a microcontroller (preferably via an analog signal). The circuit has to drive a set ...
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49 views

Can I use piezo plate instead of electret mic? [closed]

I am doing a project by following the steps mentioned here. It provides me the following circuit: Now, in place of the electret mic can I use a piezo plate? I need to use the same IC, i.e. LM358. ...
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148 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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119 views

Quartz Crystal Electrical Model

I need some explanations about the electrical model of a Quartz. Everywhere I search the definition of quartz I find that it is a crystal that starts oscillating mechanically if it receives a ...
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1answer
87 views

Appropriate model of an unknown sonar piezo

I have a collection of piezoelectric transducers that I have got from old devices. No print stamp on them, and I couldn't get a schematic of the device that could help me to find a datasheet. I ...
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252 views

How to create 113 kHz or 1.7 MHz AC signal for Ultrasonic Mist Maker?

I would like to control piezo disk for ultrasonic mist of variable frequency (kHz to MHz). Is it possible with a single circuit to generate different frequency depending on the type of disc that I use?...
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351 views

Why there is no a variable-frequency crystal oscillator?

Quartz crystal oscillators have better frequency stability than tuned circuits of capacitors and inductors. However, they are used only as components with a fixed resonant frequency. Variable-...
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1answer
120 views

How to amplify a signal for piezo transducer from 1 Vpp to 200 Vpp at 400 kHz and 500 pF load

I'm a researcher working with phased ultrasonic transducer arrays. I need to amplify a sine wave at 400 kHz and 1 Vpp to 200 Vpp. It has a capacitive load of 500 pF. I'm little ...
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46 views

Piezo Transducer - Constant weight increases sensitivity, why?

I currently have a piezoelectric transducer connected up to an Arduino in the following arrangement The piezo is normally not very sensitive, unless I tap my finger directly on the sensor, or knock ...
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3answers
47 views

Voltage isolation at IC pin when Vcc=0V

I recently started a project that utilizes a piezo sensor to sense vibrations. The piezo signal is fed to a uC in order to detect vibrations above a certain threshold. However, the piezo's high ...
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37 views

Placing piezo disk in vibration sensor

I am designing a vibration sensor in enclosure to be placed on vertical surfaces, like windows, doors, etc. My first try was with ready made sw420 module, but looks like it is to sensitive for my ...
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2answers
125 views

How can I get a loud noise out of a 15mm piezo disc?

I need to get an as loud as possible noise out of a 15mm piezo disc, using only the 3V from Arduino. I know I will have to make some sort of amplifier circuit, and I have attempted to make a basic ...
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37 views

Piezo buzzer : transient audible noise when exciting over 20kHz

Let's 2 simple experiments, connect a piezo buzzer like this one to a bench amplifier driven by a function generator like this one. Driving voltage is 10V. Now excite it with a linear chirp from ...
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33 views

Using piezo sensors to locate vibration position

I am working on a project where I have to determine the position of vibration or knock using multiple piezo sensors. I am using simple piezo discs and reading the voltage signals from the discs using ...
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91 views

A peculiar issue in an atomic force microscope [closed]

I'm not sure where else to turn for this issue. Hopefully you all can offer some insight. Sorry the title is so vague, I don't know how to explain this concisely. I am a teaching assistant for an ...
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2answers
60 views

Is it possible to suppress oscillation at reactive load (non inverting amp)

I am using a non inverting amp with B class voltage follower to drive a piezoelectric transducer (used as sonar for fish scanning in boats). I am using trains of 20 sinewave pulses (85KHz), like the ...
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1answer
70 views

Piezo Film Contact Mic to instrument cable

I'm trying to attach an instrument cable to the DT4-028K/L w/rivets (Piezo film) and make something exactly like this Large PVDF Film Tab contact microphone. My only issue is I get large amounts of ...
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355 views

How can I reduce the volume of my dryer buzzer?

Like many of us, the buzzer in my dryer is loud as hell. I recently opened up my dryer to repair it and easily found the buzzer and simply disconnected it. However I got to thinking: Could I replace ...
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22 views

Mixing Reverse Polarity Protection PMOS with a Piezo Element

I have a circuit that powers some leds when vibrations are detected. I am trying to integrate a PMOS for reverse polarity battery protection. When the PMOS is present the circuit simulation fails as ...
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78 views

Simple push-pull problem

I've made a circuit based on the schematics below, which works fine at simulation. The goal is to add some extra oomph on the output of a LT1210 opa (V1) to drive a piezo element at higher voltages ...
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1answer
162 views

Oscilloscope Probe - How to measure a sensitive circuit

Help needed in measuring a tiny piezo actuator. The circuit bangs the actuator with a voltage ( max 50V ), then senses the ripples after the initial actuation. How can I measure with an oscilloscope ...
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1answer
70 views

What does “resistor as a reference” means?

I have a book with some projects examples that use Arduino, one of the projects use piezo to detect vibrations. The book says the following: When plugged into 5V, the sensor (piezo) can detect ...
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68 views

Piezoelectric Project

I am currently working on project involving piezoelectricity and I'm in need of some advice. I'm pretty much a beginner, but I've been doing lots of research. I just need input to help fill some gaps. ...
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180 views

Floating analog input using Arduino with 1m cable

I use an analog input from an Arduino to read the value from a piezo plugged in parallel with a 1M ohm resistor. I followed this tutorial from Arduino: https://www.arduino.cc/en/Tutorial/Knock Here ...
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117 views

Small axial inductor for piezo disc buzzer?

I'm planning to operate a 15mm piezo disc as a buzzer at about 5 KHz. Can I use a 5mH 0.5W axial inductor for this? Peak current through the inductor is 70 mA, average current 22 mA, average ...
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1answer
240 views

Modern piezo microphone impedance-matching circuit

I want to record sound with a piezo transducer. I am connecting it to my sound card's input which has a good mic pre-amp. The levels are quite good and the sound seems quite clear but there's a lack ...
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818 views

Understanding an ultrasonic piezo driver circuit

[Disclaimer: I'm okay-ish with digital electronics, but somewhat a noob with analog stuff. Since this circuit is a) pretty simple and b) still covers both areas, I was hoping that somebody here could ...