Verifying diagram layout

Discussion in 'Embedded Systems and Microcontrollers' started by cmjb13, Dec 1, 2015.

  1. cmjb13

    Thread Starter Member

    Mar 18, 2015
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    Hello,

    I have an arduino uno

    The uno is connected to a stepper motor which is currently working fine. In the attached diagram, I have an mp3 module, push button, external computer speakers, and a 3.5 male to female stereo extension cable. I'm trying to attach everything, but have a few questions.

    1. Is it feasible to use one end of a jumper wire to GND on the arduino and to cut the other end of the jumper wire off, strip the wire, and sodder it directly to GND on the mp3 card?

    2. MP3 to Arduino 5V connected using M-F jumper wire. Push button 5V to Arduino 5V connected using M-F jumper wire. How do I "tie in" the male ends of 2 jumper wires to use 1 arduino 5V?

    Thanks.
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    #1- sure
    #2-splicing, using a breadboard, finding another 5V source, making a 5V distribution bus,etc...
    Easiest for you might be to cut a jumper (leaving the end and a few inches of wire that plugs into the 5V hole on the arduino) and then making a "Y" with wire to feed your 2 devices.
    something "like" this.. But split into a Y in the middle of the wire and not at the single end
    http://www.cableleader.com/media/ca...d-sub-jumper-wire-y-type-male-to-two-male.jpg
     
  3. cmjb13

    Thread Starter Member

    Mar 18, 2015
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    Like this?
     
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    yes.. but I thought you were talking about 5V not ground.. (image caption says ground)
     
  5. cmjb13

    Thread Starter Member

    Mar 18, 2015
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    My error it should be from 5V on the .mp3 card, not ground
     
  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    Wait.. per the specs of the MP3 card... 5V ain't gonna work..
    • Power supply: 6-12VDC
     
  7. cmjb13

    Thread Starter Member

    Mar 18, 2015
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    I'm already using an external 9V power supply to the arduino
     
  8. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    Then why are you worrying about splitting the 5V to the MP3 module?
    The 5V pin supplies 5V from the internal regulator..
    The Vin pin will supply the voltage thats attached to the barrel jack.
     
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