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Photoflash capacitors and Charging

Discussion in 'General Electronics Discussion' started by T3rr0rByte13, May 1, 2016.

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  1. T3rr0rByte13

    T3rr0rByte13

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    May 1, 2016
    I must confess I am very new to electronics. I have 3 capacitors (80uf, 330volt) wired in parallel, then a switch, then a 1kΩ resistor, then I have 2 AA batteries to charge the capacitors. Got the circuit built, ready to flip the switch and monitor the voltage of capacitors, however I have no idea what is likely to happen. Questions I have:

    1. about how long do I have until the capacitors are fully charged?
    2. if I take too long to switch the charging circuit off will the capacitors explode?
    3. how dangerous is what I am doing?
     
  2. cjdelphi

    cjdelphi

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    Oct 26, 2011
    How long to charge them? With just 2 aa batteries? ... never

    Not dangerous at all without extra circuitry
     
  3. T3rr0rByte13

    T3rr0rByte13

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    May 1, 2016
    What would you recommend that I charge them with? My idea is to discharge them into a coil, I am making a coil gun of sorts.
     
  4. cjdelphi

    cjdelphi

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    Oct 26, 2011
    The aa batteries are fine, you need to step up the voltage (inductor/transformer required)
     
    T3rr0rByte13 likes this.
  5. Colin Mitchell

    Colin Mitchell

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    You need to see the coil gun article where you put a projectile in the barrel and fire it at a person and it kills them immediately.
    A really fun project.
     
  6. hevans1944

    hevans1944 Hop - AC8NS

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    Jun 21, 2012
    What is "a coil gun of sorts"? What will you use your "coil gun" for? What type of projectile will your "coil gun" launch? How fast will the projectile be when launched from your "coil gun of sorts"? What is the mass of the projectile? What is its size and shape? Will it be dangerous, perhaps lethal, for a living organism to intercept the projectile while it is in flight? Your answers to these questions are of great importance to the life of this thread.
     
  7. cjdelphi

    cjdelphi

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    Oct 26, 2011
    Can't a low voltage super cap be used? 2.7v 500f for less than $10 will put a photo cap to shame...

    I suppose the the copper coil would need to be quite a lot thicker than it's high voltage counterpart
     
  8. davenn

    davenn Moderator

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    because if this is done correctly, it is a dangerous project

    please reread the rules you agreed to when your signed up


    Dave
     
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