HELP HELP HELP need schemetic diagram from pcb

Discussion in 'The Projects Forum' started by s2pk, Oct 2, 2011.

  1. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    I am working on an inverter that can be operated on 12v and 24v, i have found the following pcb that can invert 12v can someone plz convert it to a circuit diagram

    [​IMG]

    [​IMG]
     
    Last edited: Oct 2, 2011
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    I cannot read all of the lettering on the board.
    I can make out some of it.
    +12V-, FEED, 100R/5W, 50HZ,
    I can read the 1N4007 diodes, the 1k & 10k resistors, 1uF and 10uF caps.
    Don't know what the things with the rounded tops are. Can't reed the numbers on the rectangles. I think the IC is a 3624?

    It would help if you could take photos that are larger, in better focus and brighter.
    The best lighting for such photos are outside on a cloudy-bright day.
    Flash photos don't work very well; they are much too harsh.
     
  3. Markd77

    Senior Member

    Sep 7, 2009
    2,803
    594
    A good technique is to take a picture of each side of the board (use a tripod to get clear pictures and to get them the same scale). In photoshop or similar you can mirror the copper side and superimpose it on the other side.
    Like this but done properly:
    Another thing that might work is to shine a strong light from the copper side and take a photo of the printed side.
    [​IMG]
     
    • eg.jpg
      eg.jpg
      File size:
      23.4 KB
      Views:
      103
  4. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    clear image is uploaded plz check now
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    I don't know how you think the top of the board is more clear; I can't read ANYTHING from the new image. :p
     
  6. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    why don't u just zoom it, or just circle the parts which you don't understand
     
  7. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Do you have a scanner? If you could scan both sides of the board at 300 DPI or better, that would make things a LOT easier.
     
  8. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    don't have a scanner :((
     
  9. magnet18

    Senior Member

    Dec 22, 2010
    1,232
    124
    There's not that many parts there, and only 1 ic, why don't you just sit down and draw it out?
    You could even use markd77's picture in combination with the actual board and it wouldn't take too long.
    also, I can make out everything but what those 5pin rectangles are supposed to be...
     
  10. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    My monitor is ancient, so images look darker than they should. My eyes are not what they once were either, so the combination makes it very difficult for me to make out the details.

    Using zoom doesn't help.
     
  11. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    @magnet18............its difficult for me that's why I have posted the circuit here
     
  12. #12

    Expert

    Nov 30, 2010
    16,261
    6,768
    It's difficult for me, too. Maybe that's why it's called, "work".
     
  13. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    can you tell me which software I should use for drawing schematics of this pcb ???
     
  14. Darkstar

    Member

    Sep 3, 2010
    104
    0
    Hi,
    I saw your problem so I used photoshop to try and clear up and brighten up the photos. I added clearer labels to the printed side. Everything was readable but the rectangles on the right which look like "0313".
    I also aligned and sized the photos so they could be overlayed. I had to change my Kb size for posting.
    I hope this helps.
    P.S. I use photoshop for my schematics and all graphics. I'm sure there are other programs just for electronics.
     
  15. magnet18

    Senior Member

    Dec 22, 2010
    1,232
    124
    You can always use paper, then transfer it to something like eagle
     
  16. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    What people are saying is it is hard work for them too. You are just going to have to do it yourself, but you can ask for help if you have trouble interpreting something specific.
     
  17. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    these triangles are D313 transistors
     
  18. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,750
    759
    Ya..reverse engineering takes time and patience.
     
  19. s2pk

    Thread Starter Member

    Jul 10, 2010
    77
    0
    can someone draw this pcb in altium or proteus?
     
  20. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,750
    759
    I use eagle. and I got my hands full.
     
Loading...