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Registered Member #1551
Joined: Wed Jun 18 2008, 06:21PM
Location:
Posts: 7
Zenador wrote ...
Tesla C wrote ...
Well the flash caps are rated at 330 and somewhere around 120µF. But as for the silver ones which can be seen in the picture i'am not sure what they are rated at. But maybe someone else can tell us what they are rated at.
The large flash caps are 300V to 330V, and 120uF to 160uF. The caps in the multiplier (yellow or silver) are 1nF @ 200V, or 1nF @ 400V (I have seen both the 200V and 400V varieties.) and are easily damaged. Excessive heat (from de-soldering and re-soldering) has caused breakdowns between the layers, which can then be seen arcing internally.
I couldn't find my specific part numbers online, so I took one to my electronics shop, found an equivalent cap (by package) and compared the identification. They are most likely identified like 103k200 which breaks down as (iirc):
1 = (capacitance in nF) 03 = multiplier factor k = ? 200 = voltage
Z
Yeah I saw the ratings on the silver or yellow ones with ratings like that and didn't under stand what they meant by it, so thanks for sharing that information. Although what that K means being unknown hopefully it doesn't matter much.
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
I just hooked only 8 capacitors on the multiplier, and when i turned it on, i got a lot of hissing near the ground due to ions, but eventually it stoped working. Cut off a few diodes and caps, and worked again, and then stopped. Is there any thing im doing wrong here besdies touching leads to the grounds to make it snap?
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
It seems like there isn't a resistor in series with the output because of the snapping when you make it discharge to ground. The discharge's peak current might be exceeding the peak current of the diodes causing them to fail.
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Myke wrote ...
It seems like there isn't a resistor in series with the output because of the snapping when you make it discharge to ground. The discharge's peak current might be exceeding the peak current of the diodes causing them to fail.
That's very likely the case. It has happened to me more than once. Use a limiting resistor if you want to keep your multiplier alive!
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Jamil merali wrote ...
could i use this as a power supply
I suppose it would work, I don't know how much output current will it be able to supply. Still, getting some used disposable cameras shouldn't be too much trouble.
Jamil merali wrote ...
whats the easiest way to wind a coil
For coils of this size I suggest just holding the former in your one hand and the wire in the other. Start turning the former with one hand and guide the wire with the other. That's how I wound my coil.
Registered Member #1951
Joined: Sun Feb 01 2009, 01:59PM
Location:
Posts: 105
For coils of this size I suggest just holding the former in your one hand and the wire in the other. Start turning the former with one hand and guide the wire with the other. That's how I wound my coil.
that is how i wind all of my coils :P
EDIT: is it possible to use your own build charge cap for the tesla circuit? anny ideas about why my cascade does not work? anny point's i can check?
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Jamil merali wrote ...
could i use this as a power supply whats the easiest way to wind a coil
I don't think that would work. It seems that it is a piezoelectric 'thing'. it puts out no real current, and i am sure that no matter how small our cap (within reason) it would not be able to charge it fast enough.
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Arcstarter wrote ...
I don't think that would work. It seems that it is a piezoelectric 'thing'. it puts out no real current, and i am sure that no matter how small our cap (within reason) it would not be able to charge it fast enough.
I think those little negative ion generators are based on small 'flyback-like' ferrite core transformers, just like disposable camera flashes are. But still, the one sold by Goldmine is said to draw only 50mA at 12V. That makes only 0,6VA and I suppose that is not enough. However it could possibly draw more current when under load. I might be wrong, though. Better to go with at least two disposable camera transformers. Better yet, try finding a bigger ferrite core and wind your own flyback transformer. Then you could drive it with a 555+MOSFET driver.
BTW, I've got a crazy idea. What about building a small ZVS flyback driver with two BS170 and power a disposable camera transformer with that thing? (with replaced primary, of course)
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Small Tesla Coil using disposable camera transformers
