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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2answers
158 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
48 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
96 views

Generating PWM from 24 VDC Power Input [closed]

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
2k 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
101 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
102 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
107 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
238 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
156 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
128 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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1answer
927 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
305 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
274 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
237 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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2answers
276 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
956 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
87 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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1answer
1k 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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3answers
576 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
634 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
168 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
345 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
194 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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2answers
387 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
271 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
274 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
661 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
157 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
110 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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2answers
518 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
59 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
255 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
597 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
635 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
3k 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
456 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 ...
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3answers
658 views

How are multiple frequencies played through a speaker/buzzer without distorting eachother?

I have an idea for an Arudino project which is essentially a piezo buzzer music machine that I will be able to program sheet music into. It would consist of individual 555 oscillator circuits at ...
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1answer
818 views

Piezo Buzzer as analog sensor for ESP8266 Huzzah Breakout

I'm using Adafruit's Huzzah ESP8266 breakout board (overview & pinouts), and I'd like to take input from a Radioshack piezo on the analog input pin without frying it. (Piezo datasheet, for ...
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217 views

Piezo element lifespan in vibration environment

Can anybody guess or does anyone know what lifespan can be expected of this piezoelectric sensor - https://www.sparkfun.com/products/10293 - with a weight glued to it and used inside a passenger ...
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1answer
80 views

Damage a phone from intermittent charging? [closed]

Is it possible to damage a phone by charging it with an intermittent power source? For example, by using piezoelectric transducers in the soles of your shoes. Assuming they're wired to a 5V ...
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0answers
298 views

piezoelectric sensor sensitivity

I am experimenting with this guy - http://wiki.seeed.cc/Grove-Piezo_Vibration_Sensor/ and it seems to be quite insensitive. It won't respond to table knocks when I knock it with the piezo bender ...
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1answer
530 views

Determining frequency of self-drive piezo oscillator circuit

I have the circuit below, and I am wondering how the resistors and capacitor alter / determine the frequency that the piezo element vibrates at. I am assuming that they make a difference but I can't ...
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0answers
42 views

Help with modelling a piezo

I'm using the Van Dyke model from this article and I'm a bit lost on a few things. Since the only nodes I can physically connect to are the ends, can I assume that I am limited to the voltage across ...
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2answers
658 views

How to filter out in-band noise at the same level as my signal?

I'm implementing a system wherein I'm detecting waves as they come trough my piezoelectric sensors in a board. Essentially, I would want to record the time these signals appeared in my sensors as I ...
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1answer
1k views

piezo sensors's resonant impedance

I'd like to know what does the term "piezo resonance impedance" mean. It is commonly available with the datasheets of piezo sensors such as this. Is it the same as the piezo transducer's insulation ...
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2answers
803 views

Finding the Resonance Frequency of a Piezo

Using the circuit outlined in this white paper I have been able to find the anti-resonance of the piezo in question. I am using a Rigol DG1022 to create my signal, a sine wave at 20 V p-p, and a ...
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2answers
929 views

Driving a 600W Piezo transducer for sonar application

I am looking to build a circuit capable of driving a 600W piezoceramic transducer with an impedance of 200Ω at a frequency of 50kHz. Since it is being used in a sonar application only short pulses(...
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3answers
2k views

How to make a piezoelectric transducer buzz louder?

I am trying to make a piezoelectric transducer buzz loudly, but have so far only been able to make it create a quiet hum. I have tried using a basic amplification circuit with an NPN, but this made ...
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1answer
1k views

Ultrasonic generator - a couple of questions

Here is the ultrasonic generator circuit I'm trying to understand: It is powered by USB and it produces 100V at 100kHz on the piezoelectric speaker BQ1. Two ...
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2answers
2k views

How does current flow through a mono (TS) guitar cable?

My basic understanding of electronics says there must be a complete circuit for electricity to flow, so does that mean there is both a + and - wire inside a mono guitar cable? Or does electricity flow ...