help making a circuit board

Discussion in 'The Projects Forum' started by markosillypig, Mar 29, 2010.

  1. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    hi all i have tried lots of programs for making circuit boards and they still dont work for me could any one make me a circuit board template as i have tried so many times without sucsess
    thanks
    pic of scamat included
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,019
    1,542
    In any of the PCB circuit software, you have to first reproduce your schematic in the software "schematic capture". You don't just start off with the "PCB maker" part of the software.

    Hope this helps.
     
  3. BMorse

    Senior Member

    Sep 26, 2009
    2,675
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    Actually, you can just jump right into making the PCB without a schematic, but there will not be any error checking.... (I do this all the time in Eagle and in Express PCB), But it is highly recommended that the OP start with a schematic since it would be easier to check netlist errors and such...

    B. Morse
     
  4. John P

    AAC Fanatic!

    Oct 14, 2008
    1,634
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    No, that isn't necessarily true. You could make a PCB design by laying out the circuit "free hand" if the software allows it. Obviously it's a risky procedure, but if the circuit is simple it would have a chance.

    Try FreePCB:

    http://www.freepcb.com/

    If this is one that you've tried and failed with, then all I can say is you haven't tried very hard. It's dead simple.

    Edited to say: My reply was directed at the original message, not BMorse.
     
    Last edited: Mar 29, 2010
  5. SgtWookie

    Expert

    Jul 17, 2007
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  6. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    HI Thanks sgtwookie for the advice i managed to do it
    just wondered if some one could check it to make sure it is ok
    i'm going to mount the to3 on the outside of the box
    tp9/7/6 or for the to3 tp3/4 are for the vcc+ and -

    thanks
    marko
     
    Last edited: Mar 29, 2010
  7. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You might find the video interesting - http://www.edn.com/blog/1700000170/post/30053603.html?nid=3351&rid=16356411

    I have this thing about threading traces between pads, unless really necessary. The attached layout is a suggested alternative. Notice I used a cheapo FET in place of those two transistors. I see I left off the 220 μF cap, but by accident.

    The component J1 is a zerohm resistor. A clipped resistor lead will work as well as a jumper.
     
    Last edited: Mar 29, 2010
  8. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    where does r2 conect to ??
    looks like a good alternative to what i have been using will give it a try thanks
     
  9. beenthere

    Retired Moderator

    Apr 20, 2004
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    That was clever of me - R2's open pad should attach to the +12 volt trace. Sorry.
     
  10. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    like this ????
    thanks
    again
     
  11. beenthere

    Retired Moderator

    Apr 20, 2004
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    That is correct.
     
  12. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    what is the polarity of the irf530 ??
     
  13. beenthere

    Retired Moderator

    Apr 20, 2004
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    It's an N channel FET. Google the name to find a data sheet. Just about any TO-220 package FET should work. I selected that one because of availability and it's cheap. An IRF510 or 520 would probably do as well.
     
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