TENS from audio

Discussion in 'The Projects Forum' started by atoz, May 13, 2013.

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  1. atoz

    Thread Starter New Member

    May 13, 2013
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    Hi,

    can someone help me out with a simple amp circuit? For maximum flexibility, waveform is provided from an mp3 player. <= 10 kHz, unipolar, switchable polarity, <=25 mA (assume R<3kΩ).
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,123
    3,048
    You want to use your body in place of the speaker load?

    TENS is a well-known technology but I don't understand what you want to do.
     
  3. atoz

    Thread Starter New Member

    May 13, 2013
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    Yes. The voltage will have to be higher, as Z is higher.
     
  4. wayneh

    Expert

    Sep 9, 2010
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    You might just use a transformer to increase the voltage of the audio signal. I built a TENS unit powered by a 9V battery, and used a wall-wart transformer (something like a 20:1 winding ratio) to get the voltage up. Works great. Of course the original secondary becomes the primary. That has a low impedance, so be mindful when you load your player with that low impedance.
     
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  5. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
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    Wow, that's a long list of safety cautions for using TENS, sounds pretty dangerous for someone that can't design an amplifier themself.

    I would suggest finding a new project.
     
  6. atoz

    Thread Starter New Member

    May 13, 2013
    8
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    I'm looking for a high duty cycle, so I doubt the player will have the juice it needs. Sorry tshuck, electronics isn't even my hobby. If someone happens to know an IC for something like this, let me know.
     
  7. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,052
    3,817
    So, TENS discussions are allowed but automotive is off limits?
     
  8. wayneh

    Expert

    Sep 9, 2010
    12,123
    3,048
    Compare the death rate from automobiles versus TENS units and you'll have your answer.
     
  9. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    I will close this thread as safety can not be garanteed.
    The TOS does not allow ANYBODY get hurt:

    Bertus
     
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