Millivolt Amplifier

Discussion in 'The Projects Forum' started by Machinesoft, Oct 13, 2012.

  1. Machinesoft

    Thread Starter New Member

    Oct 13, 2012
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    Hi im am currently working on a special proyect and I need to take the millivots from a microphone signal and turn them from 1-10mv to something between 100-240v. So I need an amplifier to do that but I dont know wich one or if it would be better to link multiple amplifiers. This would be used to charge a phone. This is really important mi duedate for this proyect is 12/28/2012.
     
  2. wayneh

    Expert

    Sep 9, 2010
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    Whoa, do you hope to use energy captured by the microphone to charge a cellphone battery? You don't need (just) an amplifier, you need an energy harvesting strategy. I'll bet the self-discharge rate of the battery exceeds the power available.

    A normal "amplifier" uses a small signal to control a big power supply. It doesn't really amplify power so much as it amplifies information contained in a signal.
     
  3. Machinesoft

    Thread Starter New Member

    Oct 13, 2012
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    The amplifier would be used to enlarge the signal but then pass by my partners invetion that turn signals into steady electrical currents and vice versa so I just need the correct amplifier to get the 100-250v necessary because if the soundwaves enter from a mirophone they create the signal needed to turn that electrical signal into an electrical current.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I'll go out on a limb and say that a microphone cannot generate enough energy to charge a cell phone battery (or any battery that I am familiar with).:(
    You really need to choose a new project while you still have time.
     
  5. MrCarlos

    Active Member

    Jan 2, 2010
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  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Keep in mind that an amplifier requires a power supply. How are you going to charge it?
     
  7. MrCarlos

    Active Member

    Jan 2, 2010
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    Taking advantage of the trip:
    The energy must come from somewhere else other than the microphone.
    Of course.
     
  8. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Exactly. So what's the point in using one? (The question is directed at machinesoft.)
     
  9. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    I think if it's a really good microphone, it will create enough energy to run the amplifier and still have enough left over to charge the battery.

    Can't talk anymore now, I have to get back to work on my perpetual motion machine.
     
    ErnieM, wayneh and Ron H like this.
  10. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    Don't bother. I just finished my time machine and saw your perpetual motion machine doesn't work.
     
  11. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    You would be better off diluting water!
     
  12. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    Let me borrow your time machine.... I need to go forward in time and ask the older, wiser version of myself what I did wrong.:D
     
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