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parts for lamps

Discussion in 'Electronic Basics' started by Bryan L. Koschmann, Dec 15, 2003.

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  1. Hi,

    I hope this isn't inappropriate for here, but I'm looking to make some
    white LED lamps (task lights, music stand, etc) since I can't find
    anything that suits my needs. I'm wondering if anyone can direct me to a
    supplier for goosneck parts or other lamp-arm parts?

    Also, do white LEDs have any dimming capability?

    Thanks,

    Bryan
     
  2. The light out of most LEDs is roughly proportional to their current.
     
  3. CFoley1064

    CFoley1064 Guest

    I hope this isn't inappropriate for here, but I'm looking to make some
    Hi, Bryan. The part you're looking to make already exists -- superbright LEDs
    are now in standard bases. The link below is one source -- use Google for
    more.

    http://www.superbrightleds.com/led_prods.htm

    Your best shot would be to just get a gooseneck task lamp at a garage sale, and
    find a superbright LED bulb with a base that will fit.

    You can vary the intensity of LEDs most efficiently by using a fast switching,
    varying duty cycle signal to turn on and off a transistor which drives the LED.
    Again, use Google to find various schematics for hobbyists.

    Good luck.
    Chris
     
  4. Hi Chris,

    See, that would be okay if it were just a desk lamp I wanted to make. But
    I have a few different uses for these, so while I could still pull apart
    an old lamp and use the parts, I would rather buy just the parts I need
    and know I can make a couple :)

    I saw on some show they bought all the parts new to make various lamps,
    saying "they are available at most hardware stores" but none around here
    seem to have those parts.

    I'll look into that schematic. I don't know much about this stuff but I
    can follow a schematic.

    Thanks!

    Bryan
     
  5. Look around for a place that either repairs or sells mostly lamps.
    They usually have several suppliers for parts to fix all types of lamps,
    and they should be happy to sell you what you want. Try a big indoor
    flea market, as well. One last resort is thrift stores where they get
    all kinds of weird lamps to resell. Odd lamps are hard to move and are
    usually very cheap.
    --
    10 days!


    Michael A. Terrell
    Central Florida
     
  6. Ian Stirling

    Ian Stirling Guest

    Down to relatively low currents.
    (good White LEDs are generally quite visible at a current of a microamp
    (a ten thousandth of their nominal power)

    The other benefit is that they don't go red as they are dimmed.
    They may shift colour a little, but much less than ordinary light bulbs
    do.
     
  7. I made a gooseneck out of a C clamp and a length of some 10 AWG copper
    wire. I used hose clamps to fasten the wire to the C clamp.

    White LEDs are easily dimmed by reducing the current. The ligth they
    put out stays white, and doesn't turn orangish like an incandescent
    does. You can increase the series resistance, or pulse width modulate
    the DC to the LED. But the easiest way is just to switch on or off
    the LEDs in banks of 3 or 4, or more. Just connect the banks to
    multiple on/off switches.

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  8. Look for Corrugated Steel tubing...... You can find it at plumbing or
    hardware stores in the form of flexible connectors for water heaters,
    though this is usually copper.... flexible gas connectors might also
    be a little more expensive alternative, they are generally more supple
    than the water connectors but they come in smaller diameters.

    The above alternatives are finished productas obviously and they will
    be more expensive than the raw material itself but they are readily
    available.

    You might also go to a plumbing place and see if they carry any
    flexible tubing used for running gas lines, it comes as a raw tubing
    and its quite popular now and they might have some scrap pieces laying
    around. It comes with a plastic covering but this can be easily slit
    and removed.

    good luck
     
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