A physical effect that translates mechanical stress to generated voltage. It is a reciprocal effect, so the application of voltage can induce stress/strain. Used for speakers/microphones, load cells to measure weigh and most commonly in strikers for igniting BBQ's and lighters. A common material ...

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1answer
51 views

Piezoelectric Transducer, effect of voltage amplitude vs frequency of pulsing signal?

I am not an expert in piezoelectric transducers used for ultrasound applications so I am looking for some insight into the matter. To extract the greatest amount of acoustic energy from the ...
2
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2answers
120 views

Quantifying the piezoelectric effect of ceramic capacitors

In comparing ceramics vs tantalums one of the oft cited disadvantages is the tendancy for ceramics to exhibit a piezoelectric (i.e. microphonic) effect. Old-school technicians talk about ceramic ...
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0answers
119 views

Piezo & RFC Modeling! [closed]

I want to model the circuit in the picture below. It is an ultrasonic humidifier. But I can't model it for two reasons: The inductor on emitter is a RFC (radio frequency choke). There's a crystal ...
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1answer
170 views

Is this a possible design of Triggered Spark Gap?

I am trying to make a triggered spark gap for discharging capacitors (around 470uF, charged to 300-400V), for entertainment purpose. I have searched for triggered spark gap designs, but I am not sure ...
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2answers
155 views

How to improve the sensitivity of a piezo assembly?

First and foremost I’d like to warn you that I’m not a native English speaker. Sorry in advance for my mistakes. And also I’m kinda a newbie in terms of electronics; so go easy on me please, I will ...
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1answer
88 views

Piezoelectric pressure sensors

I'm currently working on designing a circuit that will utilize two piezoelectric stacks (5mm x 5mm x 20mm Parker stacks) that are loaded into a housing in parallel mechanically. The circuit I'm ...
1
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1answer
56 views

dual piezo pickup

I experimented with different types of piezoelectric disks as double bass pickups and found two that picked up different parts of the frequency spectrum decently. The specification of the two piezos ...
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3answers
181 views

How/Where to boost voltage in a 555 timer to drive piezo transducer

I am trying to create a simple and cheap frequency circuit with a 555 timer to drive a piezoelectric transducer. The transducer I am using calls for a 48v input with 1.66Mhz frequency timing. I've ...
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1answer
217 views

Can I turn a Piezo Buzzer into an ultrasonic Mist Maker?

You may have been reading my questions for a project I am doing. This one is a bit off the wall - I purchased a small 'bottle-top-humidifier' off of amazon and opened it up just to take out the ...
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2answers
529 views

Help with Piezo conditioning circuit schematic

I have the below schematic that uses a piezo sensor as input and relays that information to an Arduino board for processing. The schematic came from a few folks over at MIT that built a ping pong ...
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0answers
199 views

Piezo disc to produce enough power?

Recently I've been wondering about how I can use a piezo electric disc to place on a string instrument, such as a guitar, to generate some sort of electricity. There are obvious challenges in order to ...
2
votes
1answer
308 views

Pressure/force map (0-5kg) via sensor grid

I have a surface 40x36 cm. I would like to recognize the shape and weight of specific objects on that surface. Here is the "big picture". The first idea was to use touchscreen overlay (infrared or ...
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3answers
1k views

Why are non-contact voltage detectors sensitive to vibration?

I have noticed that if I slap a non-contact voltage detector against my palm, the LED blinks. I have tried this with four six different detectors, each a different brand, and each clearly a different ...
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3answers
304 views

Piano keys touching detection

I would like to make glove with pressure sensor on each finger to detect a moment when piano player touches a key. What kind of sensor should I use? I tried use simple buttons, but it is very ...
3
votes
1answer
177 views

Charge mode piezoelectric signal conditioning

I have a charge-mode piezoelectric dynamic pressure sensor (datasheet link) that I want to read a signal from. If you look at the datasheet it says the sensor outputs are in a balanced and floating ...
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4answers
293 views

How do I multiplex many signals into my sound card?

I'm looking for a recipe that will allow me to... Hook 24 piezos to a box that will "multiplex" their output into a single signal that I can connect to the microphone input on a PC soundcard. The ...
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1answer
136 views

Removing a piezo transducer from a reference design

I'm building a system which is intended to supply a microcontroller with a smoke-detection alarm. I'm currently intending to base the circuit on a Microchip RE46C190, which I can source fairly easily. ...
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1answer
66 views

From Synapse RF Engine to PIC

I made a little program on my Synapse RF Engine to detect some vibrations and then turn on a light basically. What I want to know is how do I get this prototype to an actual PIC that I can connect ...
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2answers
596 views

Charge Model vs Voltage Model for Piezo Electric Sensor

The following document describes signal conditioning circuits for Piezeoelectric sensors. I was interested in knowing which model should I use when designing signal conditioning circuit for ...
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2answers
363 views

piezo vs mems accelreatometer for earthquake [closed]

if i want to detect earthquake based on acceleration, what kind of accelerometer is better? Piezo or MEMS
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4answers
5k views

Driving 50W-250W ultrasonic transducers with sine: Any Class B 135KHz monolithic power amp ICs?

My project needs to drive a medium power ultrasonic piezoelectric transducer from a sine wave (/ sawtooth) sweep generator that sweeps +/- 2% of the transducer resonant frequency. The question: What ...
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2answers
773 views

Using Low votage audio amplifier with a load cell

I am trying to hack a scale so that I can read the data onto my Arduino. There are four piezo sensors, one at each foot, in the scale. Obviously I can't just read straight off of the sensors, so I ...
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3answers
590 views

How to diagnose crosstalk

I am completely new to electronics, and am trying to learn by building an electronic drum set. I've found lots of examples online of circuits to condition the output from a piezo to be read by a ...
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2answers
295 views

Sample application for generating energy from Piezeo Electric Crystal.?

I am working on a project where I need to prove that Piezeo electric crystal can help us to generate electricity and can be applicable on streets.My question is that where can I find suitable ...
2
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2answers
283 views

Circuit movement detector

I'm looking for some simple schematic for movement detection. I want to use it with a small hobby project of my own to detect if someone is moving the box, doesn't matter the direction. I'm looking ...
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3answers
771 views

Controlling piezoelectric-actuated mirror wth arduino

I would like to know where I can purchase a piezoelectric-actuated mirror device, such as those used in a single-colour laser pattern (not scanning) projector eg. the kinds used at music ...
2
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2answers
862 views

Arduino Piezo Knock Sensor Synth

I would like to create a synthesizer using 20 separate piezos for the triggers. In other words, each piezo would trigger a separate tone. At the very least I would like to know if connecting 20 ...
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2answers
711 views

Please help identify this diode

This is a part from a (severely amateurish) Piezoelectric transducer amplifier circuit. I am looking to identify this diode so that I can find a datasheet for it as well as possibly purchase more. ...
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3answers
987 views

Piezo as a switch to flash an led when disturbed

An LED embedded in a small translucent item (say half the size of a pack of cards) that would flash on briefly if the object was disturbed or tipped over. I immediately responded that a piezoelectric ...
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2answers
5k views

Driving piezo buzzer from MCU pin

I'm looking for the right circuit to connect my piezo buzzer to MCU (STM8S in my case). I don't have a partnumber\datasheet for my particular buzzer, but I've found a number of similar schematics in ...
4
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2answers
2k views

What's the function of the diode in this driver connected to a piezo buzzer?

I can't remember the source of this image, but I found a similar image in an Ekulit catalog. One recommended circuit shows just a resistor in series with the piezo buzzer. But this one adds a diode. ...
3
votes
2answers
2k views

Arduino analog signal read problem?

Why do I get analog reading to the non connected ports, by taping the piezo in channel 1 ? The piezo element is only connected to Channel 1 (Arduino A[0] port). The channels Ch 1 – Ch 6 are connected ...
2
votes
4answers
2k views

What's the cheapest way to detect vibration with Arduino?

What's the cheapest way to detect vibration with Arduino? What's the vibration sensor that I need? I want to detect PING PONG NET vibration and light on led if touched.
4
votes
2answers
2k views

Amplifying sound from a microphone

I have a small piezoelectric ultrasonic microphone (receiving signals of around 40 kHz). But the voltages it generates are too small to be read by my micro-controller's ADC. So I want to amplify the ...
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1answer
579 views

Small Piezo Buzzers

I am looking to get my hands on some Pizeo Buzzers that are as small as possible. So far I have found 10mm round, which is good, but I was wondering if anyone knew of ones that are smaller still? I ...
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5answers
228 views

Sense vibrations in audible range

I am interested in making a small circuit that could sense the vibrational frequency of the object that it is attached to. The resonant frequencies would be in the audible range (likely 5kHz to 10kHz) ...
7
votes
1answer
10k views

Simple Electric Shock Device

Can anyone tell me how to make a simple electric shocking device (like a electric pen or hand buzzer style). I've seen people use piezoelectric elements from lighters (is that correct?) but I would ...
5
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2answers
754 views

Maximum power out of a piezo?

How do you extract the maximum amount of energy from a piezoelectric element? (For energy harvesting purposes.) The maximum power theorem would seem to say that you need to load it with a ...