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Boost Converter 4.5VDC-330VDC

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LAN_403

Killa-X

Wed Oct 01 2008, 04:13PM

Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
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Posts: 1039

So uh, when you say change the frequency of the 555, you mean change the resistors on it, and not add a crystal right? When I get home ill try to change the frequency and see if I get changed.

Other than that, it's not my coil inductor or pot then? :D

Also reminds me to re-connect my lm311 to its power. woops. I disconnected it as a test for charging and made no difference so, the led does trip on when i get to 80 but meh.

guitardude012, 12V to LM311?

guitardude012

Wed Oct 01 2008, 07:40PM

Registered Member #968 Joined: Fri Aug 24 2007, 04:54PM
Location: Norman, Oklahoma
Posts: 104

Killa-X wrote ...

guitardude012, 12V to LM311?

Yep. Spec sheet says 5-36V is good.

Killa-X

Thu Oct 02 2008, 01:55AM

Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
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Posts: 1039

Quick question...I got a left-over motor housing from a 120V paper shredder. Recently to make my coil (until i buy 20guage), I used its magnetic coils to make mine. Let me explain...

This is like a 2.5X2 1.5 inch metal case. Metal like you find on transformer, where if u try to take it apart, its slice by slice. Of corse the motor spindle has magnet wire. BUT it also had 2 very large thick coils for the magnet, instead of normal magnets. Now, I hammered the coils out of the glued cuts. Now im left with a empty metal frame with a big 1 inch round hole. MY QUESTION:

What if I put this frame around my coil? Would it effect the eddys and make it shoot less? Or actually help since its a round frame that was originally used for 2 super coils, and a motor?

youngcoilgunner

Thu Oct 02 2008, 05:27AM

Registered Member #1633 Joined: Tue Aug 12 2008, 04:21AM
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Posts: 45

it might help. im guessing it would be very similar to barrys external transformer iron. idk, make it removeable, and test it with and without the projectile.

Killa-X

Thu Oct 02 2008, 09:54PM

Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
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Posts: 1039

youngcoilgunner wrote ...

it might help. im guessing it would be very similar to barrys external transformer iron. idk, make it removeable, and test it with and without the projectile.

Yeah, I today removed the other coil from it so I can use it. It's a good size like I mention, and the 4 U cuts are from holding the big coils (on top) that are the 120V electromagnets.

Heh, it's an artwork?

youngcoilgunner

Thu Oct 02 2008, 11:59PM

Registered Member #1633 Joined: Tue Aug 12 2008, 04:21AM
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Posts: 45

cool cool
bt if your going for external iron, make sure that the iron is close to your coil, and that the leaves align with the direciton of the magnetic field, and are not perpendicular to it.

Killa-X

Fri Oct 03 2008, 01:25AM

Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
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Posts: 1039

youngcoilgunner wrote ...

cool cool
bt if your going for external iron, make sure that the iron is close to your coil, and that the leaves align with the direciton of the magnetic field, and are not perpendicular to it.

Yeah for now my coil doesnt hit it, I plan to remake a coil since mine is shit. I mean, 80V, im lucky it fires a few feet. Since due to past issues, one shot ripped the coil out with it, and well, it was a hasle to put back in, so i just leave it hanging out :P Yet oddly, it still fires good. but i will HAVE to replace this. So yeah, Like i said in my PM, i used

for my schematic.

Lol, I replaced the 15K resistor on the 555 with a 1MOHM for fun, and it makes this weird low pitch buzzy ring sound.. like camera chargers, just low pitch it works, better.. now i can easly get passed 150 :D :D :D

Yet my 12V 300ma wall socket still wont charge fully yet, maybe 150V but.. to me its not a stable ringing, its like staticy. Any other suggestions I can change to make it charge better? 1MOHM really did a lot. my 9V battery even hits 150V.

voyagerscout

Tue Oct 07 2008, 07:20PM

Registered Member #1696 Joined: Sat Sept 13 2008, 06:01PM
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Posts: 21

I separated the voltage comparator from the circuit, and made this circuit:
Voltagecomparator

the 330VDC lines are attached to my capacitor bank
does this circuit work?
greetz

youngcoilgunner

Wed Oct 08 2008, 03:54AM

Registered Member #1633 Joined: Tue Aug 12 2008, 04:21AM
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Posts: 45

i would think it would. nice drawing program by the way

voyagerscout

Wed Oct 08 2008, 12:00PM

Registered Member #1696 Joined: Sat Sept 13 2008, 06:01PM
Location:
Posts: 21

sarcasm? I used paint xD

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