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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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 ...
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4answers
45 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 ...
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30 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 ...
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15 views
Piezoelectric coefficient modes 31 and 33 - What's the difference?
I'm having a hard time understanding the difference between model 31 and 33.
I understood it as follows:
These terms are ratio of strain with applied field, whereas the indices represent the direction ...
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34 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 ...
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2answers
67 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 ...
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3answers
51 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 ...
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46 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 ...
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2answers
230 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 ...
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2answers
134 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 ...
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1answer
39 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 ...
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71 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 ...
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1answer
47 views
Debugging a SA 90.4 800W class-D audio amplifier
I am using a Re-audio SA 90.4 800W 4-channel class D audio amplifier (https://www.amazon.com/REAudio-SA90-4-4-Channel-Digital-Amplifier/dp/B00RE9EO7K) for some underwater piezoacoustics experiment. ...
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2answers
53 views
Why do magnet door/window alarms use always-on switches?
I am looking at door/window alarm designs, and they all use overcomplicated circuits with an always on switch, where the piezo is triggered when the switch is off.
If the switch was always off, it ...
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1answer
98 views
6-channel piezo buffer jfet circuit
Even though I'm a total beginner at electronics, I've decided to build a 6-channel piezo pickup buffer/mixer unit, for a stringed instrument. It should fit into a typically sized electronics cavity, ...
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1answer
70 views
How to DRIVE a piezo driver circuit
I want to implement a driver circuit for piezo actuators for a positioning system. For this, I require a high-voltage, low-current output, similar to the one discussed here which features a circuit ...
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1answer
28 views
Driving piezo scanner tubes using the driven internal electrode configuration
I'm planning on doing a project involving a piezo tube scanner (PTS). The PTS will be used for 3 axis manipulation of a sharp needle. PiezoDrive has a few scanners and some info on how to use them. ...
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2answers
142 views
Protect Op Amp input from piezo sensor overvoltage
I have a circuit that I'm using to detects "knocks" using a piezo element. It seems to work adequately, but as I half suspected, I have now demonstrated that it's possible for the piezo element to ...
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31 views
Piezoelectric Backscatter Communication
I am currently working on a project. We have a metal bar as test object and at each end we stuck a piezo disc. I am trying to use one piezo as a sender and the other as receiver or reflector. I tried ...
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1answer
51 views
Is it possible to drive a power piezoelectric in lower frequency than its own frequency?
I am driving a piezo transducer simply by an inductor series with piezo.
the resonant frequency of the piezo is about 40KHz and I designed a 20KHz transducer.
I'm giving a pulse voltage (using a class ...
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1answer
104 views
What happens when DC is applied to a piezo crystal?
I've heard that when an alternating current is passed through a piezo crystal it vibrates. But what happens if a direct current is passed through the crystal? I'm assuming depending on the direction ...
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33 views
Ultrasonic dual transmitter-receiver circuit
I am building an ultrasonic flow sensor, based on piezoelectric actuators from cheap HR-SR04 modules. I need to measure the speed of sound back and forth. Schematic like this is good to send pulses:
...
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73 views
How can I protect my amplifier, MCU, and laptop from damage in my application circuit?
I am trying to integrate a few devices for a laser stabilization system. I have a tentative circuit diagram that I'm asking for more expert guidance in implementing. I am using an MX200 from ...
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2answers
432 views
Help me understand this high voltage amplifier circuit for driving a piezo actuator
I am researching HV driver amplifiers for controlling piezoactuators. My background is in physics, so I am a bit out of my comfort zone here. I came across the following schematic and have been ...
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181 views
Convert analog piezo “transition” to digital signal
I'm trying to get what amounts to a knock indication into a microcontroller input from a piezo sensor. It's looking fairly good now at the fifth iteration, and about ready to provide digital levels ...
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3answers
136 views
What should I do to control the impedance in piezoelectric energy harvester
I am trying to design an piezoelectric energy harvester circuit and using voltage multiplier rectifier to build it now.
I am using a piezo film, LDT4-028k as a source and it has 11nF cap inside the ...
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1answer
68 views
Is it possible to combine two CFU455IT +/-2kHz (4kHz) ceramic filters to get a +/-1.25kHz bandwith (2.5kHz) filter?
Can I put two of these cheap (less than 3USD) and common CFU455IT +/-2kHz (4kHz bandwith -6dB ) ceramic filters in series to get a lower bandwidth good for SSB TX? If I'm correct I will get -12dB at +/...
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28 views
Sensing of AC current. Isolation Capacitor Problems?
I want to measure the AC Current flowing through a Piezocrystal (replaced in the circuit with a resistor) being driven by a TI DRV2700. http://www.ti.com/lit/ds/symlink/drv2700.pdf
This Chip puts out ...
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2answers
116 views
Are ultrasonic Tx/Rx pairs really just the same sensor?
I want to retool the classic HC SR04 rangefinder to be able to do ToF gas flow sensing. I need to be able to do ToF on a column of air in both directions, so it benefits me to be able to use the ...
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40 views
MPU 6050 accelerometer generating gaussian noise with strange gaps
I was using an GY-521 accelerometer/gyroscope module in order to provide inertial tracking. The GY-521 interfaces with an Arduino which sends data over a serial connection. I convert these values into ...
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2answers
164 views
How does this piezo input circuit work?
The following circuit is part of an electronic drum kit, and is repeated several times on the board to connect piezo elements to a micro-controller that samples the various inputs. I've represented ...
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23 views
piezo sensor drums
I am sure their is an answer but my question is very basic ( i am a total novice in electrical engineering ) but have a coding/maths background.
I have a simple piezo sensor ( see image .
Question ...
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MOSFET source measures 12V, still nothing will turn on
Please, bear with me, I'm a real rookie at electrical engineering. So please be easy on me. ;-)
I've got the following circuit. I have a 5 seconds HIGH / LOW interval on ...
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2answers
41 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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1answer
60 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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148 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 Iām not so much at home in the electrical world but Iām ...
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1answer
330 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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39 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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1answer
125 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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1answer
97 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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1answer
189 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
321 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
36 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
102 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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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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33 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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1answer
643 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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2answers
103 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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58 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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90 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 ...