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
90 views

Charge Amplifier response and frequency response

I am getting ready for my final and have completed everything on my study guide except for two questions I cannot figure out. Here is the first question.. I have gone through all my lectures and ...
0
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0answers
124 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
208 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 ...
6
votes
3answers
559 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 ...
0
votes
3answers
198 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
145 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 ...
1
vote
4answers
220 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 ...
3
votes
1answer
120 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. ...
0
votes
1answer
65 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 ...
3
votes
2answers
372 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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votes
2answers
276 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
9
votes
3answers
3k 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 ...
1
vote
2answers
648 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 ...
8
votes
3answers
466 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 ...
1
vote
2answers
244 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
votes
2answers
268 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 ...
1
vote
3answers
531 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
votes
2answers
731 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 ...
0
votes
2answers
574 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. ...
0
votes
3answers
670 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 ...
4
votes
1answer
4k views

Driving piezo buzzer from MCU pin

Good day! 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 ...
4
votes
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. ...
2
votes
2answers
1k 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 ...
1
vote
2answers
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 ...
0
votes
1answer
446 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 ...
3
votes
5answers
218 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) ...
6
votes
1answer
7k 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
votes
2answers
670 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 ...