Electronics Running LEDs from mains

Discussion in 'Modding' started by Parge, 3 Sep 2013.

  1. Parge

    Parge the worst Super Moderator

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    Hi guys,

    I wanted to put some LEDs in my custom built wardrobe. I have a socket on the inside of the wardrobe (its built into the wall) so wanted to power them using this, with a switch on the inside that I can turn on/off.

    Is there any easy way for me to power these, or will it require some complex home made transformer kinda malarky.

    I can solder!
     
  2. longweight

    longweight Possibly Longbeard.

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    No problem at all, what voltage are the LEDs?
     
  3. Tealc

    Tealc What's a Dremel?

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    In the thread below (on OCUK) I discuss and show a few different ways of powering LEDs including using a wall mains adaptor.

    LEDs are low voltage DC devices and need the AC voltage converted from 240v AC to a more manageable low DC voltage.
     
  4. Woodspoon

    Woodspoon What's a Dremel?

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  5. longweight

    longweight Possibly Longbeard.

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    There shouldn't be any soldering if he has decent LED tape / modules.
     
    Last edited: 3 Sep 2013
  6. Parge

    Parge the worst Super Moderator

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    Any, I probably need quite bright ones though (god, does that even make a difference to their voltage? I don't know!)

    Thanks for this dude! I'm going to have a read through!
     
  7. dynamis_dk

    dynamis_dk Grr... Grumpy!!

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    I've done it using a lower powered adapter for a laptop etc. I've got some 5v and 12v output supplies that work fine for something like this. I just put the right resistor in as required and jobs a good one. Depends a little on if your using LED strip etc but I found it the best way with the least work involved so ran with it :p
     
  8. Atomic

    Atomic Gerwaff

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    You can just use a mains to USB power adapter, chop the plug off a cheap USB lead and wire the LEDs up to that.

    Most White LEDs are 5v so USB power adapters are perfect :)
     
  9. Tealc

    Tealc What's a Dremel?

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    Only USB LED strips will be 5v. A 12v LED strip needs at least 10v. A discrete LED would need 3.5v@20mA.
     
  10. longweight

    longweight Possibly Longbeard.

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    I would just buy some LED tape and a 12 or 24V driver.
     

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