Low Voltage - high current?

Discussion in 'The Projects Forum' started by Luka Ćorić, Aug 11, 2015.

  1. Luka Ćorić

    Thread Starter New Member

    Aug 11, 2015
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    Hello everybody...

    I am working on some project were piezo crystal needs to oscillate to 30KHz..
    I set up the 555 chip in astable mode to work on 30KHz, but I don't have enough current..

    So main question is: How can I get the 100W on the output of 555 chip with the 10-16V.

    I mean how can I get high current of 5-10Amps with specified voltage...
    Can someone provide me some circuit and components that I need to use...

    If you need any detailed info about this, fell free to ask.. I will provide any info needed...

    Andy help is appreciated.
    Thanks!
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    What are you trying to do? There maybe a much easier way.
     
  3. Luka Ćorić

    Thread Starter New Member

    Aug 11, 2015
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    I am trying to make piezo crystal to oscillate at 30KHz with the 100W power at 10-15V...
     
  4. panic mode

    Senior Member

    Oct 10, 2011
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    where did you get piezo crystal rated for 100W? what is the part number?
     
  5. Luka Ćorić

    Thread Starter New Member

    Aug 11, 2015
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    It's not really rated crystal.. But it can handle 100Watts... It's a tape shape piezo...
    If i put the piezo only on the 555 output on the frequency I can hear lets say 5Hz..
    I hear the piezo ticking...

    Of course I can't hear it on the freq above 20KHz but 555 timer sends those pulses, know I just need to amplify them...
     
  6. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    Is the natural resonance of the piezo supposed to set the frequency? If so, then the 555 is redundant. What you need is a power oscillator like is used in an ultrasonic cleaner.
     
  7. Luka Ćorić

    Thread Starter New Member

    Aug 11, 2015
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    The 555 timer is in astable and he sending the output pulses to the piezo.
    Now I just need to give him more current.

    Unless I am missing something here?
    I don't know does he have some sort of natural frequency, do You have any schematic of that power oscillator?

    I attached pic... My piezo is simmilar to this one.
     
  8. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    Which will take 5W forever, or take 100W for about 1 millisec.
     
    #12 and Luka Ćorić like this.
  9. Luka Ćorić

    Thread Starter New Member

    Aug 11, 2015
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    Well according to information I have. Piezo takes 8W for cm^2.
    My piezo dimensions are:

    1.4 x 8.5 = 11.9 cm^2
    8W x 11.9 cm^2 = 95.2W

    Unless my info are not correct???

    So are you telling me that if I put my piezo at 30KHz with 5W and put the drop of water on it, I will see the power of 30KHz??
     
  10. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    post the datasheet or manufacture/part number of this piezo
     
  11. ScottWang

    Moderator

    Aug 23, 2012
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    I have the same felling as MikeML, it seems look not that much watts, if you want to see the 100 Watts is here.

    [​IMG]
     
  12. Luka Ćorić

    Thread Starter New Member

    Aug 11, 2015
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    I checked part num. on my piezo and I didnt get any results on Google. Part number is: 20H14-015D

    Informations I have for power dosen't have to be true....so if anyone has more reliable please post them.
     
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