Help! project is not working!

Discussion in 'Homework Help' started by Tigerlui, Jun 3, 2009.

  1. Tigerlui

    Thread Starter New Member

    May 9, 2009
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  2. Mike Mandaville

    Active Member

    May 27, 2009
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  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
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    I agree with Mike Mandaville. It would be a good idea for you to do a bit of practice soldering. It looks like your soldering iron is not up to a suitable temperature.

    hgmjr
     
  4. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Maybe the solder is plumber's solder without a flux core.
    Maybe a blow torch is used instead of a soldering iron. A soldering gun?

    The LEDs do not have a series current-limiting resistor so they are instantly fried if the battery is new.
    But the 555 won't work anyway without its pin4 connected to the positive of the battery.
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If you are just learning to solder, tin-lead solder is much easier to work with than lead free. It is hard to say what happened, but your joints are not good. That could be from no flux or too much heat. A 25 - 35 watt iron is usually enough for small work like that.
     
  6. kammenos

    Active Member

    Aug 3, 2008
    127
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    connect a wire from the pin 4 of the 555 to the (+)
     
  7. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    760
    Mike Quote
    KEKEKEKEKE :D

    Yup buddy....u need to learn soldering first. That's how you begin in electronics. :p

    Rifaa
     
  8. Audioguru

    New Member

    Dec 20, 2007
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    Maybe the solder was dripped from too high.
     
  9. kammenos

    Active Member

    Aug 3, 2008
    127
    0
    connect a wire from the pin 4 of the 555 to the (+)
     
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