Power supply

Discussion in 'General Electronics Chat' started by achie14, Aug 28, 2014.

  1. achie14

    Thread Starter New Member

    Aug 28, 2014
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    our professor gave us project which is to make power supply. can You give me Idea or design of power supply which is easy to make but at the same time a good one. it should be variable or adjustabe power supply. thank you.;)
     
    Last edited by a moderator: Aug 28, 2014
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    You coud start by saying what do you have available and what kind of output you want. Also your level of experience will help us a lot to suggest somehing that suits your level. What kind of class is this for?
     
  3. achie14

    Thread Starter New Member

    Aug 28, 2014
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    this is in our electronics 1 class, Honestly , I don't have any idea at all , .. maybe a power supply 0-30v .
     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    1st class in what kind of school?
    You could build something simple like a supply with transformer, bridge rectifier, filter capacitors, LM317 and a few resistors.
     
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  5. achie14

    Thread Starter New Member

    Aug 28, 2014
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    electronics1 is our subject in this project. I'm a third year college student . State University.
     
  6. shteii01

    AAC Fanatic!

    Feb 19, 2010
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  7. abhimanyu143

    Member

    Aug 25, 2014
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    first you need to know about component that is used to make power supply
    example 230 vac to 12 dc volt
    component
    transformer
    rectifier
    capacitor
    regulator Ic
    capacitor
    load

    read the datasheet for component
     
  8. ISB123

    Well-Known Member

    May 21, 2014
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    • LM317 and above series
    • Transformer
    • 2 resistors
    • LED
    • Potentiometer
    • Diode bridge IC or 4 diodes or 2 diodes depending on what Hz you want.
    • High F capacitor which has Voltage rating of at least 10V above you max. voltage.
    • Heatsink
    • Fuse
    Display:
    • ICL7106
    • LCD 7-seg display
    • Components required by ICL7106
    You could use VU display module in case you don't want to build one.
     
  9. wmodavis

    Well-Known Member

    Oct 23, 2010
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    Is this a learning project or a 'copy without learning project'?
     
  10. ian field

    Distinguished Member

    Oct 27, 2012
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    As someone has concealed how to reply with quote - this will land where it lands!

    The suggestion of an LM317 is a good start - to make it a really good one; feed the in terminal with a low value to sense current, the voltage developed is used to drive the B/E junction of a PNP extra pass transistor.

    You can get a lot more current rating than just the 317.

    Some manufacturers appnotes are the same as various others - some aren't, so it might take a bit of searching around to find a copy of one that explains this method.

    Some of the 78xx appnotes also describe it - a read of those is worthwhile too.
     
  11. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Use Reply instead of quote.
    Max.
     
  12. ian field

    Distinguished Member

    Oct 27, 2012
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    Someone should point out that doublespeak was 30yrs ago!
     
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