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Discussion in 'LEDs and Optoelectronics' started by devesh, Aug 26, 2012.

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  1. Aug 26, 2012 #1
    devesh

    devesh

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    Aug 26, 2012
    if i cut end of mobile charger and connect some led to so it will work or not....cz charger converts 220v to 5v?
     
  2. Aug 26, 2012 #2
    KJ6EAD

    KJ6EAD

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    Yes, I do it all the time.
     
  3. Aug 26, 2012 #3
    devesh

    devesh

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    Aug 26, 2012
    so it does need any resistor ...and how cn i make display through led....using motor...
    thanks for ans...
     
  4. Aug 26, 2012 #4
    KJ6EAD

    KJ6EAD

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    Aug 13, 2011
    It does need a resistor or some other current regulator. If you use a resistor, the value will depend on the LED specifications.

    Your reference to a motor is unclear. Are you thinking of a persistence of vision (POV) display?
     
  5. Aug 27, 2012 #5
    devesh

    devesh

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    Aug 26, 2012
    yes pov display...how cn i make it
     
  6. Aug 27, 2012 #6
    Harald Kapp

    Harald Kapp Moderator Moderator

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  7. Aug 27, 2012 #7
    devesh

    devesh

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    Aug 26, 2012
    how cn i make a digital meter for my bike...
     
  8. Aug 27, 2012 #8
    Harald Kapp

    Harald Kapp Moderator Moderator

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    LMGTFY

    5th or 6th hit on page 1. You know Google, do you?
     
  9. Sep 6, 2012 #9
    devesh

    devesh

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    Aug 26, 2012
    how cn i delay led in seconds,
    and how cn i make led remote control
     
    Last edited: Sep 6, 2012
  10. Sep 7, 2012 #10
    thebluepuppy

    thebluepuppy

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    Sep 7, 2012
    MAKE SURE YOUR PROPERLY GROUNDED FIRST MAN WHETHER OR NOT THE OUTPUT IS LOW VERY LITTLE AMPS CAN STOP YOUR HEART. SAFETY!!!!
     
  11. Sep 7, 2012 #11
    Harald Kapp

    Harald Kapp Moderator Moderator

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    He's on the 5V end of the charger. No need to worry here.
     
  12. Sep 7, 2012 #12
    Harald Kapp

    Harald Kapp Moderator Moderator

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    Just turn it on later.
    use long wires.

    Just kidding. You need to be more specific:
    How long do you want to delay the LED? Do you want to delay turn on, turn off, or both?
    Over what distance do you want to remote-control it? Do you need delay and remote control at the same time? What is your application?

    Your questions let me assume that you don't have much experience in electronics. In this case building a remote control from scratch is a very ambitious undertaking. I suggest you find a suitable ready made remote control or a kit fopr a remote control. Just to get started.
    A remotre doorbell may also be used to control a light or LED. just replace the receiver's buzzer with the LED.
     
  13. Sep 22, 2012 #13
    devesh

    devesh

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    Aug 26, 2012
    i dnt gt u ....hw cn i dealy led ?
     
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