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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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45 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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0answers
31 views

Best 2n2222a based audio amp schematic for piezo buzzer disk contact microphone for human speech? [closed]

Could anyone point me to a good, or even awesome circuit schematic using the 2n2222a transistor in an audio amp for a piezo buzzer disk contact microphone? I intend to use it to capture and listen to ...
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0answers
26 views

How to use 2 wired piezo plate like a 3 wired piezo plate

I am trying to make a buzzer using a piezo plate like in this video: https://www.youtube.com/watch?v=a4NZqbFhnug&t=40s&list=LLEse2irV_Sa80Dtw0uuKCSQ&index=5 But I can not find a 3-wired ...
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2answers
49 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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1answer
79 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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37 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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46 views

ATmega328P ADC strange behavior while reading multiple piezos

I've been working on a drum project involving having one small microcontroller for each drum pad. I'm building it using an Arduino Nano (ATMega328P). I'm currently reading ADC values from 5 piezos. I'...
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1answer
55 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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1answer
125 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 ...
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0answers
122 views

Driving a voltage boost circuit with a piezo driver circuit

For a university project, I'm creating my own small speaker. This speaker includes a speaker driver circuit consisting of a transistor and 3 resistors (see figure below). simulate this circuit –...
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1answer
42 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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0answers
24 views

High Speed Piezoactuator Driver-Unexpected (Low) Voltage Output

I'm working on a project that requires charging and discharging a piezoactuator (150V, 1.5μF) extremely fast, IE total slew time allowed ~50μs (so somewhere around a 11A pulse). My background is in ...
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2answers
76 views

Generating PWM from 24 VDC Power Input

I have a Piezo buzzer that has an internal transducer so is able to take 24VDC and work. This one has a continuous sound. Just a beeeeeeeeeeeeeeeeeeeeeeeee... I have a 24V output that needs to power ...
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3answers
1k views

Does a pickup microphone work in space (vacuum)?

Of course in space there is no sound transmitted via air, so there is no air-borne sound, but there is structure borne sound. This sound can be recorded with a pickup microphone, but do pickup ...
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1answer
41 views

Low voltage control of 75V piezo actuator

I am looking to perform position control on a 75V piezo linear actuator with a Raspberry pi. To do so I intend to use a 5V output DAC and some kind of power amplifier to amplify the range between 0V ...
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1answer
53 views

Driving a ThorLabs piezo controller with TTL external input

I am trying to drive a ThorLabs piezo controller (https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2421&pn=KPZ101) with an external +3.3V TTL signal provided by a microcontroller (using ...
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1answer
47 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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1answer
70 views

How to remove buzz from piezo speaker pickup?

I am using piezo speakers as pickup for my guitar. In one setup, for an amp, I have a 25 year old Philips powerhouse aw636 stereo, which has a mic in. The problem is that when I connect the piezo to ...
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1answer
100 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
56 views

Resetting 555 via Transistor (optionally driven by Touchplate/Piezo)

Right now I am using a 555 circuit to generate a 1kHz square oscillation (not displayed below). Generally the reset is pulled down, but through a button I drive a transistor to output the square ...
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3answers
219 views

How to drive a piezo disc?

Can I drive a piezo disc at any frequency I choose? I am trying to use some discs similar to this link. In particular, I was trying to drive one with a 5V square wave at low MHz range, around 1 to 10 ...
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1answer
170 views

Piezo speaker equivalent for circuit simulator

I am using Falstad's circuit simulator to test a design of an Op-Amp based microphone-speaker system...kind of like a megaphone, but the speaker is going to be a piezo plate. Falstad does not have a ...
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1answer
150 views

Piezo element microcontroller connection

I have a "noname" piezoelement from Aliexpress: I'd like to control it via microcontroller. Now I use this circuit to drive the piezo element: Microcontroller ports produce PWM signals. Everything ...
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1answer
117 views

Piezoelectric component connection circuit

I have a question about piezoelectric component and microcontroller connection circuit. I use 7BB-20-6L0 Murata piezo. Here is the datasheet - Link Here is my current variant: Is this schematic ...
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1answer
77 views

Filtering noisy buffer output

Please bear with me as this is my first time working with filters. I am trying to scale down the voltage from my piezo to a voltage which my ADC can read (from >100V on the piezo to 0-5V on the ADC ...
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0answers
35 views

Hardware to to simulate a poor-quality connection to a piezobuzzer

I have a piezo buzzer component that produces a clean tone after I connect it directly to a voltage source. I noticed while I'm making the connection, or I scrape the battery lead across the piezo ...
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1answer
76 views

ECG signal amplification

I am developing a project for ECG detection using PVDF (Piezo Film) sensor. I have already managed to detect my heart rate but since the sensor used produces voltage corresponding to vibrations, ...
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1answer
403 views

Vibration frequency measurement with a piezo sensor

I have a linear resonant actuator like this one: https://www.gearbest.com/other-accessories/pp_670798.html I need to control its frequency of vibration and for that I intend to use a potentiometer ...
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0answers
53 views

Piezoelectric Force Sensor Signal

I have a piezoelectric sensor that I would like to use as a force sensor. Some rudimentary testing with it tells me that it is outputting voltages in the range of 0-120V VPP, possibly more (I haven't ...
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0answers
42 views

speed of movement of piezo disk?

I am new to electrical engineering, so, if I made a nonsense question, please let me know. Piezo disk makes a sound by moving its disk.(Is it correct?) I want to generate some complex sound with ...
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1answer
545 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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0answers
58 views

Impedance match piezo-crystal and generator

I am using Texas Instruments TDC1000-7200 evaluation board and a pair of piezo-crystal transducers to measure flow in pipes by sending out ultrasonic Tx pulses at 1Mhz and receiving the echo on Rx. ...
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3answers
213 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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1answer
309 views

High frequency Ultrasonic transducer for finer mist making

I am looking to make Mist/Fog from water using ultrasonic transducer mist maker. A typical mist making products in the market are using 1.7 MHz ultrasonic transducer to make 5 Micron size Mist/Fog. ...
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2answers
81 views

How to further dampen vibration cascading on piezo-elements?

I'm trying to build an electric xylophone. I want it to be pressure/velocity sensitive so I decided to use piezo-elements to pick up 'hits'. Below is a close-up picture of my setup. So every bar you ...
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2answers
152 views

piezo stereo preamp

I have found several projects on piezo preamps but I cant find anything that can run 2 piezo inputs to make it stereo and uses potentiometer to control volume gain etc. What I found is "Collin’s Lab: ...
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2answers
129 views

Create MIDI instrument with 52 inputs and low delay [closed]

I'm building an electric xylophone, or at least trying to, which is velocity sensitive. I approach this by using piezo-sensors. The sampling of the notes will be done on a raspberry pi. So far, I have ...
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1answer
105 views

Troubleshooting noisy FET buffer for contact mic

I'm trying to follow the schematic on this page to create a preamp/impedance matcher for a balanced piezo contact mic. I've reproduced the schematic below. I've built it on a breadboard and I'm ...
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2answers
140 views

Single supply OPA445?

So basically I'm trying to make a circuit for a piezo-electric actuator. I only have access to a single supply at +70V for my op amp, an OPA445AP. Vin varies between 0 and +3V. I've looked at the help ...
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1answer
112 views

How to switch on/off RFID using piezo sensor?

I need to connect a piezo sensor to a RFID tag such that when someone presses on the piezo, the voltage generated activates the tag. A nearby RFID reader continuously looks for the tag. The tag ...
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1answer
242 views

Calculating the magnitude of impedance

I am working on a project to model the electrical characteristics of a piezoelectric (PZT) and would like to get a sanity check to make sure I am going about it in a way that makes sense. So I am ...
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2answers
152 views

What exactly is the purpose of the resistors in this diagram? [closed]

I don't claim to know a huge amount about electronics, so I just want to understand the basic flow of electricity in this schematic better. I imagine the purpose of the 1M ohm resistors are to draw ...
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1answer
86 views

Why would my signal from a piezoelectric device changes while using a voltmeter and electrometer?

When we apply a force to a piezoelectric material it produces some potential difference. I was measuring with Keithley nanovoltmeter and Keithley electrometer 6514. I am getting different output in ...
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1answer
187 views

piezo to switch a transistor

so my idea is to create a circuit that when the piezoeletric is pushed, like a switch, but i wanted to make a variable so i can control how much force it needs to acionate the transistor so when ...
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1answer
55 views

Where can I find ultrasound machine regulations?

Diagnostic ultrasound machines are limited in their output power so that the sound waves don't cavity the microbubbles in the body. What I want to know is how do manufacturers prove their power ...
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1answer
111 views

Determining speed of turbocharger via sound?

There are inductive sensors which can be retrofitted to turbochargers to measure their speed, like this: Examples can be seen here. Installation requires some careful and precise drilling and ...
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2answers
294 views

Sensor to detect ball impact

I want to detect the impact of a ball against a table tennis racket. I'm currently using Piezo discs tightly fixed in the racket wood. However, in addition to correctly detect impact, the sensor ...
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0answers
403 views

Crystal Oscillator Design and “Crystal Drive Level”

I followed the video at the link http://www.analogzoo.com/2015/07/ . The video directs watchers to a tool at http://www.analogzoo.com/lab/pierce_bjt.html to help determine parameters to cause ...
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1answer
1k views

What is a good circuit for recording a piezo contact microphone or an electric guitar pickup?

I'm building a guitar tuner that can be used with a (piezo) microphone clip for acoustic, and from the pickup for electric. In my experiments they have comparable signal levels. However, the piezo ...
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1answer
277 views

How to calculate PWM duty cycle to compensate for different piezo sounder response at different frequencies?

How to calculate PWM duty cycle to compensate for different piezo sounder response at different frequencies? I have a piezo sounder, and the datasheet informs me that I will get the following ...