Diode ID by Maximal99

Discussion in 'General Electronics Chat' started by bertus, Sep 18, 2010.

  1. bertus

    Thread Starter Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    I found this in an email:

    As I do not answer emails I make the post here so everybody can give replies.

    Bertus
     
  2. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    Dont be embarrassed. We all start somewhere.

    Amps are not given, like voltage.

    If you have a 35Ah battery that is 12v, And you want to operate a little LED and resistor off of it, the battery will push out 12v but the LED will only DRAW .02 milliAmp.

    SO, your ammeter should not read anything UNTIL amps are being drawn.

    As for the printing on the circuit board, It likely is a key or place marker/legend.

    If this is a box, It sounds like a rectifier diode or a bridge rectifier.

    A photo would help greatly.

    Is this it?:
    http://www.google.com/url?sa=t&sour...6qGnV1I-1sgIKb9TQ&sig2=AFTEL5-_f6N0rihsYPkTGw
     
  3. Maximal99

    New Member

    Sep 17, 2010
    3
    0
    Thanks! I didn't realize that this had been posted until I googled the question and saw that bertus published it. I'll send you the pic.
     
  4. Maximal99

    New Member

    Sep 17, 2010
    3
    0
  5. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    It is kind of hard to make out, but it appears to be a standard surface mount diode.

    Texas Instruments website doesn't respond with any 'SG' part numbers.
     
  6. Maximal99

    New Member

    Sep 17, 2010
    3
    0
    Thanks for checking! I'll read more on how to test this thing (voltage, etc) to get the specs. I am hoping that a few generic surface mount diodes with the proper specs will work.
     
  7. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    If its dead, there isnt much testing that will help.. ;)

    If the board is already dead, I would try a standard 1N4004 type diode for the job.

    Cant hurt.....much.
     
Loading...