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    Content by Mika Satomi and Hannah Perner-Wilson
    The following institutions have funded our research and supported our work:

    As of 2013 the KOBAKANT studio is situated in the FabLab Berlin

    As of July 2013 Hannah is a researcher at the UdK's Design Research Lab

    From 2010-2012 Mika was a guest researcher in the Smart Textiles Design Lab at The Swedish School of Textiles

    From 2009 - 2011 Hannah was a graduate student in the MIT Media Lab's High-Low Tech research group led by Leah Buechley


    In 2009 Hannah and Mika were both research fellows at the Distance Lab
    We support the Open Source Hardware movement. All our own designs published on this website are released under the Free Cultural Works definition
    Circuits and Code

    Sound Amplifying Circuits

    This post covers a few different (very basic) techniques for amplifying various sound sources. On the one hand sound coming from circuits inside toys that make sound (toy piano, singing greeting cards, recording and playback modules…), as well as sound made by generating frequencies using a microcontroller such as the ATtiny or an arduino board. On the other hand, audio coming from your laptop computer or mp3 player.

    Various hardware for sound amplification:

    Amplified Greeting-Card Sound Circuit

    Using a TIP122 transistor >> de.rs-online.com/web/p/transistoren-darlington/3136900/

    Circuit diagram:

    Circuit on paper:

    Circuit on wood:

    Videos:

    Amplified ATtiny/Arduino Sound Circuit

    Circuit diagram:

    Hacked Amplified Speaker Module

    A cheap and easy way to amplify the sound coming from your laptop computer or mp3 player is to buy a cheap amplified speaker module (make sure it uses batteries and doesn’t just run off the power of the audio supplying device!) and to hack it open and connect it to some fabric speakers for example.

    Amplified speaker modules:
    - Clas Ohlson >> http://www.clasohlson.com/no/Portabel-h%C3%B8yttaler-Exibel/Pr383986000
    - Design Torget >> http://www.designtorget.se/designtorget/se/webbshop/Teknik1.Hogtalare_mini.dcp

    To amplify the sound coming from an mp3 player to a fabric speaker:

    Fabric speaker:

    Hacked amplified speaker module:

    Video:

    5 Comments so far

    1. Amplifying fabric and paper sound circuits #WearableWednesday « adafruit industries blog on November 28th, 2012

      [...] Perner-Wilson writes wrote up an informative post about amplifying sound circuits, including those that exist on fabric and [...]

    2. Plusea on November 29th, 2012

      [...] Some simple ways for amplifying various audio signals >> http://www.kobakant.at/DIY/?p=3794 [...]

    3. A Little Ludwig Goes A Long Way » Programmable behavior everywhere, in everything. on November 30th, 2012

      [...] going to be embedded everywhere — and not just in the obvious places, but in objects made of fabric or paper or wood, or in plastics. This last one is really fascinating, combining 3d prototyping and electronic [...]

    4. Week 10 Slides: Sound (Updated!) | Computational Craft on April 14th, 2013

      [...] Amplifying Sound Circuits Paper Speakers from HPW [...]

    5. nini on June 25th, 2013

      Low energy light is required for the boat in sea voyages. It becomes especially important in the sea far electricity generator.
      http://www.led-spotlight.net/FAQ/

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