lamp switch panel?

Discussion in 'General Electronics Chat' started by relicmarks, Nov 1, 2008.

  1. relicmarks

    Thread Starter Active Member

    Oct 13, 2006
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    when testing 10 digital inputs , my test fixture uses 10 on/off switches to +5volts
    when testing 10 digital outputs, my test fixture uses 10 lamps

    who makes a box/unit that has a bunch of LEDs or lamps that are in parallel that have switches to turn off each Lamp or LED ?

    10 lamps in parallel with 10 switches in parallel to turn them off or on, who makes a box/unit like this please?

    The lamps on my homemade text fixture give my eyes black spots and head aches , do u know what i can use over them like a filter or lamp shade? they are just small bulbs
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Reduce the voltage/current, make a filter.

    It sounds like making such an indicator box would be cheaper than buying one.
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Nobody that I know of. However, you can get 10-position DIP switches and 10 LED dot/bar displays pretty inexpensively. A SIP (single inline pin) resistor with 10 internal commonly-connected resistors would make it easy to connect up, using a perfboard.

    You need a diffusion lens. A translucent piece of plastic like a piece of a milk jug should work pretty well. A finely woven piece of white cloth (like an old bedsheet) or piece of typing paper would also work. Put it a half-inch or so away from the lamps, between your line of vision. Super-bright LEDs can cause permanent eye damage; don't look at them.
     
  4. relicmarks

    Thread Starter Active Member

    Oct 13, 2006
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    0
    ya i tried the dip-switches but my fingers hurt after using them so much during testing

    Because when testing digital chips that have multiple inputs and outputs i use switches to +5 for the inputs and Lamps/LEDS for the outputs

    So i'm trying to find a box/unit that has a bunch of switches for the inputs and another box/unit with just LAMPs or LED's for the outputs

    another example is if you have a motherboard of a circuit (not a computer motherboard) that has 15 molex connectors for the inputs and 15 molex connectors for the outputs

    I need to test every input and output of each molex connector which has 8 wires to each molex connector , so thats alot of input wires and output wires

    using switches tied to +5 volts to each wire on the molex connector so i can toggle the inputs and than have a LAMP on the output molex connector wire

    using Switches to +5 volts on the inputs and LAMPS on the outputs help than using a logic scope to test digital signal tracing

    I need a switching matrix or panel thats in a chassis frame with Lamps or LEDs
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
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    Rebuild the tester. Use toggle switches instead of DIP switches. Use diffused LED's instead of bright lamps.

    I rebuilt a couple of testers at places I worked.
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
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    This sounds like a build-it-yourself project.

    If you're going to use LEDs, I suggest getting either widely diffused types, or those with a milky lens.

    Most of the cheap Chinese LEDs for sale on auction sites nowadays are super-bright, and have a very narrow focus angle with "water clear" lenses. In my opinion, those are not suitable for your purpose; you'll get those "black spots", headaches, and there is a very real possibility that you will permanently damage your vision.
     
  7. relicmarks

    Thread Starter Active Member

    Oct 13, 2006
    355
    0
    ok thanks alot guys

    i thought i was going to do vision damage
     
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