Diode question.

Discussion in 'The Projects Forum' started by tee2, Nov 28, 2008.

  1. tee2

    Thread Starter Active Member

    Nov 19, 2004
    46
    3
    I have a circuit I want to build (LED chaser) that calls for 1N4148 diodes and all I have is N4748A diodes can I use them? Is there a good all around diode I should have in stock?

    Thanks

    Todd
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    The 1N4148 is a normal silicon diode
    The 1N4748A is a 22 V Zener diode

    As long as you dont't reverse bias the diode it may work. If you do there will be some surprising results.

    BTW. You diid google "1N4748A datasheet" -- didn't you?
     
  3. tee2

    Thread Starter Active Member

    Nov 19, 2004
    46
    3
    I did look a the datasheets, but they are over my head. I am a total newbie. I'll find a circuit online and build it. The problem is it dosen't say why to use the components, just use them.

    I know that the 1N4748 is a Zener diode. I don't know the deference between that and a normal silicon. :confused:

    This is what happens all the time. I don't know what to use and get frustrated and give up. Then six months later I'll try again.

    Thanks for the help.

    Todd
     
  4. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    1N4148/1N914 diodes are great for compact, low-current (<100mA) projects.
    1N4001 thru 1N4007 are OK for general purpose 1A power rectifiers.
    Radio Shack sells both of them in bubble pack assortments for a buck or two.

    Digikey is certainly less expensive; they'll ship SMALL orders via 1st class mail which saves money.
     
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