Mostly Scratch Built Stereo System -- Need help, please

Discussion in 'The Projects Forum' started by Novus_Legio, Dec 18, 2013.

  1. Novus_Legio

    Thread Starter New Member

    Oct 5, 2013
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    Next semester in college I am taking an Advanced Woodworking class. I am going to build a tool cabinet and I would like to add two sets of speakers, which is all I have. I will play music while I work

    One set is Parallax 1220 and the other set is KLH 170 Loudspeaker.

    What I am asking is which circuits do I need and what electronic components are needed as well. I want to go from my Ipod to 3.5mm jack to the (amplifying?) circuit to the four speakers.

    There was a website I found a while ago that has several hundred schematics but the favorite was lost with the update of Mozilla. I believe the schematics I need are on that website, but I cannot remember the name.

    Thanks in advance
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Are u planning to build an amplifier ?
     
  3. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    If you want to build an amp for the fun of it, then someone here can help. But if you really just want an amp, you can buy a class D amp for a lot less than you can build it. Here's an example: http://www.ebay.com/itm/2-X-80-Watt...023?pt=LH_DefaultDomain_0&hash=item3cd325baef
     
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  4. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    Same thing I did when I built an amp to drive speakers for my TV. The best way to do it is use audio amp IC's like:

    http://www.ti.com/lit/ds/symlink/lm3876.pdf

    http://www.ti.com/lit/ds/symlink/lm3876.pdf
     
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  5. gootee

    Senior Member

    Apr 24, 2007
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    Yeah, depending on the desired maximum continuous average output power, use LM3886 or LM1875. The diyaudio.com website has everything you need.
     
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  6. Novus_Legio

    Thread Starter New Member

    Oct 5, 2013
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    Yes, I believe an amplifier is what I need.

    What I am wanting is one that can have two left channels and two right channels. I looked for an AB 2 channel amplifier on ebay, but there were only ones from China.

    What about the 3.5mm jack? Would I need to get a separate circuit to incorporate it?
     
  7. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    If you build your own using IC power amps, you can add as many channels as you want.

    Not sure what you mean. I think the output from the headphone jack of the IPOD can drive straight into the inputs of the IC amplifiers. You can adjust the volume on the IPOD. Just get a stereo cable with the kind of plug that goes into the IPOD on one end and whatever plug to match with the amp you are building.
     
  8. Novus_Legio

    Thread Starter New Member

    Oct 5, 2013
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    I found a website that has all sorts of ICs. http://www.futurlec.com/IntegratedCircuits.shtml I am guessing something from the page "Special Function -- NXP/Phillips" section "TDA Series" http://www.futurlec.com/ICSFPhilips.shtml

    I would like to build this on a breadboard, since I am not very good at soldering. I am not sure which IC, on the previously mentioned website, would be best for breadboards.


    I think I need a DAC IC the Parallax speakers are from the year that "A long time ago in a galaxy far, far away" first appeared in a movie thought to be a failure. The KLH speakers are from the year that the aforementioned movie's sequel came out. :) My favorite set of movies. :)
     
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