A little help from someone with schematic knowledge please.

Discussion in 'General Electronics Chat' started by ItsTheFark, Aug 22, 2009.

  1. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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  2. Mike2545

    Active Member

    Mar 26, 2009
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    They really don't mean anything, just whatever the designer put in the schematic, mostly I/O pins and Gnd. I would ignore them.
     
  3. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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    SO if i were to make a list of materials needed to make it, it would be:

    3x 10k resistors

    NE555 chip
    7812 chip
    3x 0.01uF capacitors
    1x 0.02uF capacitor
    1x 1000v 6A diode
    24V rechargable battery source
    Capacitor bank
    1x spool of 22 AWG wire
    1x IGBT
    wire to connect it all together
    breadboard

    Is that correct?

    By the way.. holy <snip>.. i just realised. What connects the set of circuitry with the 24V power source and the 7812 chip to the rest of the circuit?
     
    Last edited by a moderator: Aug 22, 2009
  4. bertus

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  5. Mike2545

    Active Member

    Mar 26, 2009
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    Really??:confused: I thought I covered that!! :rolleyes: Jeez could you simplify that for the rest of us?:D
     
  6. Wendy

    Moderator

    Mar 24, 2008
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    You said it, but a picture is worth a thousand words. :D This is one of the few new OP that has given us a schematic without asking, we don't want to discourage that.
     
  7. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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    Uh oh so i did a no-no?

    Sorry guys i didnt know i shouldnt post origional schematics.

    But can you please answer one more question? What connects the secment of the 7812 chip-circuit with the power source to the rest of the circuit?
     
  8. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    It is very good that you gave the schematic.
    This way it is much easier to give an answer.
    As Bill said "but a picture is worth a thousand words".

    Greetings,
    Bertus
     
  9. hgmjr

    Moderator

    Jan 28, 2005
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    You did not commit a no-no. Bill Marsden was praising you for providing a schematic of the circuit. Many new posters tend to forget to provide a schematic.

    hgmjr
     
  10. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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    Yeah sorry i miss-read, i was about to edit that before i saw what you guys posted right there. :confused:

    So yeah im trying to build this, I am not sure if you guys can tell its a boost converter. And sadly the custom symbols are throwing me off, I can get all the generic symbols but not the others.

    As I am a new poster here, I am also new to the world of circuitry.

    Of course my confusion has spread with what yous aid :confused:

    I was hacking camera circuits before this to use their circuits but it simply isnt a fast enough charging for the capacitors so i found this.

    With the camera circuit i simply put the power source where it said, , soldered two wires to the "Push Button?" i guess you can call it.. the thing that starts the charging, then connected what i wanted to be fueled by the capacitors directly to the opposite end of the capacitor bank and let it rip.

    I am not familiar with input and output pins, grounded pins. http://img405.imageshack.us/img405/7061/schematic2.gif
     
  11. bertus

    Administrator

    Apr 5, 2008
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    Helle,

    Here to the point of the stabelizer:

    [​IMG]

    The points V_switch and V_cap 250VDC seem to come from another schematic.
    Without that schematic I do not know the purpose.

    Greetings,
    Bertus
     
    Last edited: Aug 23, 2009
  12. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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    I am so sorry I am asking so many questions. I am extremely grateful for you taking the time to answer me.

    [​IMG]
     
  13. bertus

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    Apr 5, 2008
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    Hello,

    I have given some comments in the schematic

    [​IMG]

    For the point at L1 : the capacitor will be charged faster when this point is connected to +24 Volts.

    Greetings,
    Bertus
     
  14. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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    Im very sorry i feel like i must be missing something big here.
    [​IMG]
     
  15. bertus

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  16. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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    Ugh, i really want to make this but im afraid ill just be wasting my money to have it not work... Obviously i'm either not understanding what your saying, or I am missing a key point...

    What type of power source could i possibly use at that +24V point? Obviously not a battery because there is no + and - lead...

    Lastly, i got this boost converter schematic off a coil gun site. for simplicity, where would i attach the ends of the coil to on this?
     
  17. hgmjr

    Moderator

    Jan 28, 2005
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    You will need to put careful thought into the selection of the Q1. Since the voltage is likely to rise to voltage peaks in excess of the 250 volts indicated, the rated breakdown voltage across the collector and emitter needs to have a safety margin of 50 voltages or more in order to avoid damage to the transistor.

    hgmjr
     
  18. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    Here is another way to make the schematic.

    [​IMG]

    Greetings,
    Bertus
     
  19. ItsTheFark

    Thread Starter Member

    Jun 14, 2009
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    I found all of this on anothercoilgunsite.com Please- Any help would be appreciated as i have to go for a bit now. Thank you all very much for attempting to help me.

    (anothercoilgunsite.com > Portable > Construction)


    EDIT: Ah! Bertus that is VERY helpful! Now lets just assume it would be for a coilgun... where would i attach the two ends of the coil to?

    Bertus- thank you so much your help was well... very helpful. If i can get an answer to the above question i will be able to make it!
     
  20. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    Sorry I do not know the schematic of a coil gun.
    Beware there are high and dangerous voltages involved.

    Greetings,
    Bertus
     
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