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 the exhibits this effect is quartz.
Questions tagged [piezoelectricity]
121 questions
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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 are my simplest options for driving these…
Anindo Ghosh
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Piezoelectric effect in cables?
I am using a very sensitive transimpedance amplifier on a 3m long cable to a photodiode. Signal levels are about 70 nA - 700 nA. Bumping into the cable causes a large voltage spike on the output of the amplifier. The insulating material is…
kva
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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 like to know how to create one from scratch, and…
Ell
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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. What's its function?
Federico Russo
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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 datasheets:
Some of them also have a protection…
artvolk
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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 controller (a Netduino in my case). The circuit I'm…
herbrandson
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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 implementation. (And no, none of them appeared to…
Warren Young
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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 voltage created by the microphone.
I'd like a…
Ponkadoodle
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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 configuration, which I think means its output is a…
Ryan Helminen
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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 distortion or noise.
Can this be modeled as some…
wav scientist
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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 resistance equal to the piezo's internal resistance, but a…
endolith
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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 piezelectric…
Anonymous
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What is the relation between resonance frequency and piezoelectric charge coefficient?
We know that the maximum power is lost at the resonant frequency,where the impedance is minimal. On the other hand, when the impedance is minimized, the charge coefficient is maximized. In resonance frequency amplitude of vibration is maximum.how is…
Fa Had
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Is it possible to power a MCU with a button press / touch?
I hope to use a piezoelectric button to harvest and produce a sufficient energy burst to power ON and bootup a MSP430 for a few ms enough to update a simple data structure (e.g. two integers stored in nonvolatile memory e.g. FRAM) and then power…
bd3lk
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What actually is the load capacitance of a quartz crystal?
I'm having hard time understanding the principles of piezoelectric crystal oscillators.
I've found this picture:
I understand that "load capacitance" is something you have to connect to a crystal. I understand that this basically means having to…
S. Rotos
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