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Transistors

ArchiverArchiver Posts: 46,084
edited 2000-05-21 01:46 in General Discussion
Hi, just wondering if anyone can give me the easiest solution for reading a
schematic for a transistor.

you have the Collector,base and emitter.

i am only really looking for the emitter, or collector... the schematic has
three lines. and one has an arrow on it, does that represent the collector
or the emitter.

thanks in advance.

Tyson

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-05-19 20:24
    The arrow is the emitter. If it points out, you have an NPN transistor.
    If it points in, PNP.

    The base is the one that makes a T instead of a V with the inside line.

    Al Williams
    AWC
    This week only: save up to 70% on PAKs -- details at
    http://www.al-williams.com/awce

    >
    Original Message
    > From: Tyson Stephen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=VWfpoBkD7KIar19XXvpw-a2L145wAHHx8KRsQb3DCs7bmatqaHjRJHVzIL2DsMyALcaq5KxiJbipDs0]tysonstephen@h...[/url
    > Sent: Friday, May 19, 2000 1:56 PM
    > To: basicstamps@egroups.com
    > Subject: [noparse][[/noparse]basicstamps] Transistors
    >
    >
    > Hi, just wondering if anyone can give me the easiest solution for
    > reading a
    > schematic for a transistor.
    >
    > you have the Collector,base and emitter.
    >
    > i am only really looking for the emitter, or collector... the
    > schematic has
    > three lines. and one has an arrow on it, does that represent the collector
    > or the emitter.
    >
    > thanks in advance.
    >
    > Tyson
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-19 20:50
    The pin with arrow is always the collector. On a NPN (Not Pointing iN) the
    arrow points out, on a PNP (Pointing iN Proudly) the arrow points in.
    -William
    Original Message
    From: Tyson Stephen <tysonstephen@h...>
    To: <basicstamps@egroups.com>
    Sent: Friday, May 19, 2000 2:56 PM
    Subject: [noparse][[/noparse]basicstamps] Transistors


    > Hi, just wondering if anyone can give me the easiest solution for reading
    a
    > schematic for a transistor.
    >
    > you have the Collector,base and emitter.
    >
    > i am only really looking for the emitter, or collector... the schematic
    has
    > three lines. and one has an arrow on it, does that represent the collector
    > or the emitter.
    >
    > thanks in advance.
    >
    > Tyson
    >
    >
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-19 21:59
    I remember it this way:

    Pointing iN Pointer for PNP and Not Pointing iN pointer for NPN...
    Silly, but works for me!

    .mark

    >
    >From: Joost Luyten[noparse]/noparse]SMTP:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=1aFBeDUN8-e1qkYo52prMgEtylZZk5S6XMpA6HQ0Exc8DQjUvEk7XiwGHfY28_xIiW8U4Hm7lw]on2bbp@p...[/url
    >Sent: Friday, May 19, 2000 2:04 PM
    >To: basicstamps@egroups.com
    >Subject: Re: [noparse][[/noparse]basicstamps] Transistors
    >
    ><<File: ATT01656.html>>
    >Hi all,
    >
    >A rule that I once have learned in school is that you could find the emitter
    >by using three letters from the word emitter, namely eMITter.
    >MIT is the German word for 'with'.
    >MIT an arrow ==> with an arrow ==> emitter
    >I think not very often used in the USA, but works fine for me [noparse]:)[/noparse]
    >
    >--- Greetings from Joost Luyten, ON2BBP
    >
    >email :
    >- on2bbp@p...
    >- on2bbp@a... (this sends an SMS notification to my mobile phone)
    >
    >ICQ : 45143957
    >
    >Home :
    >Joost Luyten
    >Werftsesteenweg 44
    >2220 Heist op den Berg
    >Belgium
    >
    Oorspronkelijk bericht
    > Van: Al Williams <alw@a...>
    > Aan: basicstamps@egroups.com <basicstamps@egroups.com>
    > Datum: vrijdag 19 mei 2000 21:24
    > Onderwerp: RE: [noparse][[/noparse]basicstamps] Transistors
    >
    >
    > The arrow is the emitter. If it points out, you have an NPN transistor.
    > If it points in, PNP.
    >
    > The base is the one that makes a T instead of a V with the inside line.
    >
    > Al Williams
    > AWC
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-19 22:04
    Hi all,

    A rule that I once have learned in school is that you could find the emitter by using three letters from the word emitter, namely eMITter.
    MIT is the German word for 'with'.
    MIT an arrow ==> with an arrow ==> emitter
    I think not very often used in the USA, but works fine for me [noparse]:)[/noparse]

    --- Greetings from Joost Luyten, ON2BBP

    email :
    - on2bbp@pi.be
    - on2bbp@advalvas.be (this sends an SMS notification to my mobile phone)

    ICQ· : 45143957

    Home :
    Joost Luyten
    Werftsesteenweg 44
    2220 Heist op den Berg
    Belgium
    Oorspronkelijk bericht

    Van: Al Williams <alw@al-williams.com>
    Aan: basicstamps@egroups.com <basicstamps@egroups.com>
    Datum: vrijdag 19 mei 2000 21:24
    Onderwerp: RE: [noparse][[/noparse]basicstamps] Transistors

    The arrow is the emitter. If it points out, you have an NPN transistor.
    If it points in, PNP.

    The base is the one that makes a T instead of a V with the inside line.

    Al Williams
    AWC
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-19 22:08
    > A rule that I once have learned in school is that you could find the
    > emitter by using three letters from the word emitter, namely
    > eMITter.MIT is the German word for 'with'.MIT an arrow ==> with an
    > arrow ==> emitterI think not very often used in the USA, but works
    > fine for me [noparse]:)[/noparse]

    hey, that's great! you just made my day

    Jason
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-20 00:10
    The EMITTER has the arrow.

    At 03:50 PM 5/19/00 -0400, you wrote:
    >The pin with arrow is always the collector. On a NPN (Not Pointing iN) the
    >arrow points out, on a PNP (Pointing iN Proudly) the arrow points in.
    >-William
    >
    >
    Original Message
    >From: Tyson Stephen <tysonstephen@h...>
    >To: <basicstamps@egroups.com>
    >Sent: Friday, May 19, 2000 2:56 PM
    >Subject: [noparse][[/noparse]basicstamps] Transistors
    >
    >
    >> Hi, just wondering if anyone can give me the easiest solution for reading
    >a
    >> schematic for a transistor.
    >>
    >> you have the Collector,base and emitter.
    >>
    >> i am only really looking for the emitter, or collector... the schematic
    >has
    >> three lines. and one has an arrow on it, does that represent the collector
    >> or the emitter.
    >>
    >> thanks in advance.
    >>
    >> Tyson
    >>
    >>
    >>
    >>
    >>
    >>
    >
    >
    >
    >
    >

    ~~~~~~~~~~~~
    73 de KG4EXY
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-20 02:42
    SAY WHAT William???? Do you have a lot of burnt up transistors laying on
    your bench? Just funning...... ==Mac==

    At 03:50 PM 5/19/00 -0400, you wrote:
    >The pin with arrow is always the collector. On a NPN (Not Pointing iN) the
    >arrow points out, on a PNP (Pointing iN Proudly) the arrow points in.
    >-William
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-20 07:23
    Original Message
    From: Al Williams <alw@a...>
    To: <basicstamps@egroups.com>
    Sent: Friday, May 19, 2000 12:24 PM
    Subject: RE: [noparse][[/noparse]basicstamps] Transistors


    > The arrow is the emitter. If it points out, you have an NPN transistor.
    > If it points in, PNP.
    >
    > The base is the one that makes a T instead of a V with the inside line.
    >
    > Al Williams
    > AWC
    > This week only: save up to 70% on PAKs -- details at
    > http://www.al-williams.com/awce
    >


    Thanks a lot for all of your guys help
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-20 17:22
    The arrow points in the direction of conventional current flow and is found
    on the emitter. The collector is the other end of the 'V' shape, and the
    base is the flat piece. If current flows out of the emitter it is an NPN
    transistor.
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-21 01:46
    Oops [noparse]:)[/noparse] I meant the pin with the arrow is always the EMITTER! Sorry.
    -William
    Original Message
    From: Robert McAtee <w5tnj@c...>
    To: <basicstamps@egroups.com>
    Sent: Friday, May 19, 2000 9:42 PM
    Subject: Re: [noparse][[/noparse]basicstamps] Transistors


    > SAY WHAT William???? Do you have a lot of burnt up transistors laying on
    > your bench? Just funning...... ==Mac==
    >
    > At 03:50 PM 5/19/00 -0400, you wrote:
    > >The pin with arrow is always the collector. On a NPN (Not Pointing iN)
    the
    > >arrow points out, on a PNP (Pointing iN Proudly) the arrow points in.
    > >-William
    >
    >
    >
    >
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