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Sensor/LED circuit-more help needed please-multiV's and dimmer

Discussion in 'Electronic Basics' started by Gman, Aug 19, 2005.

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  1. Gman

    Gman Guest

    I think the ps Im using isn't very stable, shut down, came back,
    powered up, everything worked peachy keen.

    Gman
     
  2. John Fields

    John Fields Guest

    ---
    Excuse me if I seem rude, but what the **** is the matter with you?
    We've all invested a great deal of time and effort in trying to help
    you out, but as soon as you've been given a solution you change the
    ground rules by saying that what you asked for earlier wasn't really
    what you needed and would we all please regroup and provide you with
    what you need, this time?

    What do you _really_ want?
     
  3. ehsjr

    ehsjr Guest

    Glad you got it working. I'd throw out the 3 LEDs that had
    47 ohm resistors. They were subjected to way too much current,
    and it would be a mistake to consider them reliable after that.
    Repeat reading the above paragraph until the LEDs are in the
    trash can.

    I'd be concerned about the unstable power supply.

    Ed
     
  4. Gman

    Gman Guest

    Hi John,

    Thanks for your input, it is greatly appreciated (hmmm seems I said
    that on more than one occassion).

    And yes, you are rude. Sorry if you are having a bad day.

    Best regards,
    Gman
     
  5. Gman

    Gman Guest

    Hi Ed,

    You guys have been most awesome in helping me. As far as what the f***
    is the matter with me, I guess saying that I don't know much about
    electronics wasn't enough of a hint for some people.

    I am going to set the pots to a "factory" level and take a measurement
    and replace that with resistors of that value, and add a two position
    dip for selecting one higher and one lower level resistor (in theory
    wouldn't that give me one level brighter and one level more dim than
    factory?) . Do you see a problem with doing that?

    Best regards,
    Gman
     
  6. Gman

    Gman Guest

    Hi John,

    Thanks for your input, it is greatly appreciated (hmmm seems I said
    that on more than one occassion).

    And yes, you are rude. Sorry if you are having a bad day.

    Best regards,
    Gman
     
  7. Gman

    Gman Guest

    Hi Ed

    You guys have been most awesome in helping me. As far as what the f**
    is the matter with me, I guess saying that I don't know much abou
    electronics wasn't enough of a hint for some people

    I am going to set the pots to a "factory" level and take a measuremen
    and replace that with resistors of that value, and add a two positio
    dip for selecting one higher and one lower level resistor (in theor
    wouldn't that give me one level brighter and one level more dim tha
    factory?) . Do you see a problem with doing that

    Best regards
    Gma
     
  8. ehsjr

    ehsjr Guest

    That's exactly what you should do, once you have the things set up,
    with 2 exceptions: 1) If you anticipate changing the thing in the
    future: 2) Replace with standard value resistors close to the
    measured value of the pots.

    and add a two position
    I don't know how noticeable a difference you'll get. Maybe I
    misunderstand - but you already have 3 levels of brightness
    available and it sounds like you want to add 2 more. Maybe it's
    my eyesight, but I don't think I could detect the difference
    between adjacent levels of dimming if there are 5 different levels
    when using LEDs.

    Ed
     
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