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I need to convert Vibrations into electricl enerery. Is it possible to convert it with the use of single chips?

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  • \$\begingroup\$ What frequency range? That's basically what a lot of cheaper microphones are, just a piezoelectric material that directly converts sound waves to physical compression and thus to electrical signals. You just to need to have a basic amplifier circuit to amplify the signal, depending on your application of course. \$\endgroup\$ – Jarrod Christman Jul 15 '14 at 13:43
  • \$\begingroup\$ for the audio frequency range. and also i should sense only vibrations. because lot of other noises are also present near by the device. \$\endgroup\$ – Kasi Jul 15 '14 at 13:47
  • \$\begingroup\$ A piezoelectric transducer converts sound/vibration into electricity. End of story as far as the question is written. Now, maybe you want to add more to your question to justify why chips are needed? \$\endgroup\$ – Andy aka Jul 15 '14 at 13:49
  • \$\begingroup\$ I need to provide these output electrical signal to another chip. So i need chip so that it is easier to use \$\endgroup\$ – Kasi Jul 15 '14 at 13:52
  • \$\begingroup\$ If it's in the audio range then you should be fine with most piezo sensors, though because of their size they may not react well at lower frequencies. You'll have to look at their data sheets to see their response/resonance. In terms of your supplying the output to a "chip"... what kind of chip? Does it take analog input or do you need to pass it through a ADC? What input voltages does this "chip" take? \$\endgroup\$ – Jarrod Christman Jul 15 '14 at 13:55
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I guess to put all of my comments into an answer to be more organized. That's basically what a lot of cheaper microphones are, just a piezoelectric material that directly converts sound waves to physical compression and thus to electrical signals. You just to need to have a basic amplifier circuit to amplify the signal, depending on your application of course. Some sensors can provide digital output, otherwise most are going to be analog based and will probably need to be passed through an ADC. The frequency sensitivity will vary and you have to keep in mind that the sensitivity is based on resonance. Thus, a lower frequency vibration sensor is generally going to be larger than a higher frequency sensor. Digikey and others have a nice selection of vibration sensors.

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