Schematic & PCB not matching

Discussion in 'General Electronics Chat' started by lubnaan90, Feb 18, 2010.

  1. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    Hello All ,

    Plz take a look at the schematic & PCB i have attached with this msg .
    The schematic shows that the collector of PNP transistors are connected to the X connector & the base is connected to the 10K resistors .
    Now according to the designed pcb , the Transistor's Collector is connected to 10K resistor & the Base is connected to the X connector .
    Is it that the PCB is not correctly designed ?
    Any comments will be deeply appreciated

    Best regards
    LUBNAAN.
     
  2. t06afre

    AAC Fanatic!

    May 11, 2009
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    what transistor do you use? Whitout this information it is hard to say if you are wrong or not
     
  3. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
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  4. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    Hello,

    I am using BC557-B PNP transistor .
     
  5. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    As a matter of fact , In this schematic , I did not know which transistors to be used in this specific Circuit , as it was not mentioned for some reason ,
    "AudioGuru" Recommended me to use BC557 For this Circuit .

    You all are welcome to give me extra recommendations for the transistors to be used .
     
  6. t06afre

    AAC Fanatic!

    May 11, 2009
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    I am sure BC557 will do fine, but if you Google BC557 you will find that the base is the pin in the middle. So you have to bend the pins in order to fit it into you PCB. If you do that I will recommend isolating one of the pins. You may strip isolation from cable for this purpose. Or select another transistor.
     
    lubnaan90 likes this.
  7. lubnaan90

    Thread Starter Active Member

    Jan 13, 2010
    196
    2
    Thank you ,
    I will Consider using BC557 , Will bend the pins & make sure that they dont short or something .
     
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