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Registered Member #51
Joined: Thu Feb 09 2006, 04:17AM
Location:
Posts: 263
More voltage is better, 24v is probably a good balance of power and sanity to start with. Ive done about 90v into a ZVS before with beautiful results tho. I would go ahead and use 18 awg or so for the primary and secondary, but that's just me. Maybe i just don't like the fact that the sharp, abrasive edges of a ferrite core tend to damage magnet wire insulation.
Registered Member #1764
Joined: Thu Oct 16 2008, 03:52AM
Location:
Posts: 10
oh, ok. well i will see if i can get an bigger one.
Anyway while i have you all, i have an oscilloscope but it only goes up to 200 volts like most.. Know of a way/something i can get that will allow me to measure 2-10kv? something cheep :P
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
You can make a resistor divider from many cheap resistors and a cheap multimeter. I wouldn't suggest trying to mesure AC with it though because of lots of stray capacitance.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
Voltage dividers using 10M resistors is easy, but only when you are trying to measure DC. Once you get into AC, especially at higher frequencies, it tends to go to crap.
is a nice little design, key point to note that since it uses resistors and its such a long chain, you not only introduce stray capacitance, but depending on the type of resistor you might even introduce stray capacitance (say if you use 10M wirewound resistors).
If you really need to view HV AC waveforms: might be an option...
Registered Member #1764
Joined: Thu Oct 16 2008, 03:52AM
Location:
Posts: 10
Ok, well i wound it with 16 gauge wire 4 times, and used hot glue to prevent the arking from the terminals. It seems to make it a bit better, I will try with a biger powersupply tomorow.
Registered Member #1764
Joined: Thu Oct 16 2008, 03:52AM
Location:
Posts: 10
Ok well i hooked it up to a biger power supply, however i am occasionaly geting huge arks between two pins (not even next to each other) i have hot glued them but it did not work too well.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
brianmay27 wrote ...
Ok well i hooked it up to a biger power supply, however i am occasionaly geting huge arks between two pins (not even next to each other) i have hot glued them but it did not work too well.
I think you didn't figure the ground pin right then, try bringing the HV wire close to the bottom of the flyback you'll see the pin it wants to arc to the most.
Registered Member #834
Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644
There is a ground pin connected to the high-voltage coil, and usually some others that are the ground terminals of one or two potentiometers connected to the high-voltage terminal and a of filter capacitor. These must be grounded too or very well insulated, or will spark.
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Need help with flyback transformer.
