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looking for advice

Discussion in 'Miscellaneous Hardware' started by doug brown, Dec 8, 2015.

  1. doug brown

    doug brown Registered Members

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    Hi guys.
    I'm working on something and need some help. the project is just for cosmetics
    i have an xbox 360 that i put LED's and clear parts in, upgraded fan with two speed switch anyway through one of the windows i have a mp3 player. it has a touch screen so i can still use it through the window.
    the problem i'm having is that because it is in side the xbox i must connect it in there for power. the mp3 player doesn't have a smart charge feature. i have connected it to a 5v unswitched power source but that won't work because it only will charge and if i connect it to the 12v power source with a resistor it will do the same.
    so i guess my noobie question is, is there a way to connect it to the 5v unswitched power for charging and to the 12v to something like a power interrupter to stop the charging so it will function. the mp3 player needs 5v to charge and being a noob i have probably left out some info so anything else you need that might help just ask. thanks for any help or advise.
     
  2. Tony D

    Tony D Administrator Administrator

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    Just connect the 5V unswitched to the MP3 player. The player should control the charging.
     
  3. doug brown

    doug brown Registered Members

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    I tried that and didn't work. the mp3 player is an eclipse media player. when i connect it to the 5v unswitched it just shows the charging screen. even when i plug it in to my computer it does the same thing. shows the charging screen until i unplug it then it can be used. so i need to disconnect the power when the xbox gets turned on or it won't work. i know i could just use a switch but that would defeat how i wanted it to work. (turn on xbox it works, turn off xbox it charges.)
     
  4. Tony D

    Tony D Administrator Administrator

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    Oh, now I understand the situation. I can't think of an easy way out of this. You could use a relay configured to allow the 5V to connect to the player while the machine if off. When the switched 12V comes it, use it to throw the relay into the other position to disconnect the 5V from the player. You could probably use a transistor and a few resistors to do the same, but I forgot how to do that.
     
    allheart55 (Cindy E) likes this.
  5. doug brown

    doug brown Registered Members

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    That sounds interesting. a relay, any suggestions one which one would work for this?
     
  6. Tony D

    Tony D Administrator Administrator

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    Since we're talking 12V DC to run the relay coil, a relay designed for a car should work. They're probabaly physically larger than you'd like. Look for one with a NC (Normally Closed) set of contacts. It's OK if it also comes with a NO (Normally Open) set of contacts. You just wouldn't use that set.

    Connect the 5V line to your player to the NC set of contacts. This will allow the 5V to connect when the 12V is not there (when the machine is off). Connect the switched 12V line to the relay coil. When the 12V comes on, it'll open the Normally Closed contact set. This will turn off the 5V supply to the player.
     
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  7. Tony D

    Tony D Administrator Administrator

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    allheart55 (Cindy E) likes this.
  8. doug brown

    doug brown Registered Members

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    Sweet thanks Tony D. looks to be small enough to be able to hide.
     
  9. Tony D

    Tony D Administrator Administrator

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    Let us know how you make out.
     
  10. doug brown

    doug brown Registered Members

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    I grab the ones you linked above so how ever long shipping takes. then i can start working on it.
     
  11. doug brown

    doug brown Registered Members

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    The mail man dropped off a little something today.
    [​IMG][/URL][/IMG]
    now i just need to find out how to hook it up. going to do some searching on it. if any one knows where i can look for info at that would help i would be thankful.
     
  12. doug brown

    doug brown Registered Members

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    There isn't any numbers next to the pins on the bottom so is there a way to find out using a multimeter?
     
  13. Tony D

    Tony D Administrator Administrator

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  14. Tony D

    Tony D Administrator Administrator

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    Here's a drawing showing how to connect the relay. When the 12 is presented to the relay, the Normally Closed contact will open. Thus interrupting 5 volts to the mp3 player.
     

    Attached Files:

  15. doug brown

    doug brown Registered Members

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    Great thanks Tony D. i guess i'm to new of a member to post pic's so i'll try to get a few more posts in so i can put up a pic after i get it done. Thanks again.
     
  16. doug brown

    doug brown Registered Members

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    might be a dumb question but can i connect the ground from the mp3 player to the relay. i know the ground from the mobo gets connected to the relay. just want to make sure there won't be any issues.
     
  17. Tony D

    Tony D Administrator Administrator

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    ground is ground. You can connect the mp3 player ground wire to the point on the relay that is connected to ground.

    The relay coil connects to the switched 12 V and to ground. You can connect the mp3 player ground to the point on the relay coil which is connected to ground.
     
  18. doug brown

    doug brown Registered Members

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    that's what i thought thanks for reassuring me.
     
  19. doug brown

    doug brown Registered Members

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    ok i have it soldered together and as from your drawing Tony D the normally open pin isn't connected to anything. right?
     
  20. Tony D

    Tony D Administrator Administrator

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    That's correct. The 'Normally Open' pin isn't used in this application.
     

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