Lost the instructions

Discussion in 'Programmer's Corner' started by El_Cid, Jun 26, 2013.

  1. El_Cid

    Thread Starter New Member

    Feb 7, 2012
    4
    0
    Hello, this sounds like a very odd question, but perhaps it worth a try… I have searched the internet with no result.
    I have found the following in my electronic parts box, has a label “1A-9NE 11ES” with the following parts taped on a card. There is no instruction. Any idea what is it for?
    3 X MP 502K 1KV
    2 X 15KOhm
    1 X 840KOhm
    2 X 52KOhm
    2 X 1MOhm
    1 X M2N4871
    1 X F2N4124
     
  2. WBahn

    Moderator

    Mar 31, 2012
    17,788
    4,807
    That's gonna be a real hard one. Without at least seeing a picture of the parts, this is the best I can do:

    These are all resistors
    2 X 15KOhm
    1 X 840KOhm
    2 X 52KOhm
    2 X 1MOhm

    3 X MP 502K 1KV -- I'm really guessing on this one, but perhaps 500pF ceramic caps
    1 X M2N4871 -- probably a 2N4871 PN unijunction transistor (UJT) (Motorola?)
    1 X F2N4124 -- probably a 2N4124 NPN transistors (from Fairchild?)

    Except for the UJT, these are all very generic parts and therefore the circuit could be literally one of a thousand different things.

    The UJT is, according to the datasheet, designed primarily for oscillator, triggering, and timing circuits.

    These parts could probably be hooked up to make any one of those (and many other) circuits. Without a schematic or at least some context, there is really no way to even guess.
     
  3. El_Cid

    Thread Starter New Member

    Feb 7, 2012
    4
    0
    Thanks WBahn, you are right about:

    3 X MP 502K 1KV -- I'm really guessing on this one, but perhaps 500pF ceramic caps
    1 X M2N4871 -- probably a 2N4871 PN unijunction transistor (UJT) (Motorola?)
    1 X F2N4124 -- probably a 2N4124 NPN transistors (from Fairchild?)

    The 3 MP 502K 1KV are 1/2" dia round brown ceramic capacitors
     
  4. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    If your project is from some old book. It could be that you should drop your project. And let us help you with a more modern approach that do the same
     
    Eric007 likes this.
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