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Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
I estimated the length by usig the ruler in the picture. A vertical arc was all it took, I can pull them to about 10 cm now, so I guess our drivers are working just as good. After all, we're both using mains driven half-bridges. Do you have an extra flyback? Maybe we should try to beat the ZVS guys.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
I have two old identical flybacks, maybe I will try to run them in parallel for maximum arc lenght, but the cores are somewhat crappy so I don't know how much abuse they will take I can also try "dual double flyback" since I have four similar secondaries - I will put two on each core. If I can get some monster arcs I will start a new thread
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Oops, today I had an accident with my flyback driver I wanted to make fun from frying an old computer circuit board. I turned the driver on - and immediately an arc jumped *inside* the PC PSU box! It had jumped over 40mm which is over 40kv. Probably the circuit board connected to hv out dropped the flyback's resonant frequency near the running frequency resulting in huge voltage boost. Now I'm afraid of connecting anything big to the output
Registered Member #192
Joined: Fri Feb 17 2006, 03:08AM
Location: Canada
Posts: 44
I build a mazzilla driver too. I found you can increase the output by using a larger resonant capacitor, I'm presently using 2uF pulse rated cap. Also a capacitor across the flyback primary center tap to ground (battery neg), 0.68uF seems to help and large capacitors across the power supply input. I'm using three 12v batteries in series instead of a AC powered supply, so I didn't cap caps across the ps when I started. Also high voltage zeners, I'm using 15 volt ones. I can draw upto 13 amps at 36 volts i/p with this setup at maximum arc length . I have it connected to a small jaccobs ladder, 4 inchs at the top and it climbs a couple of inches above that with a thick orange arc, I don't I have pictures yet. I guess that's next.
What voltage are you guys running your flyback driver at and what modifications did you have to make to the mazzilla driver for that.
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
before we get too far off topic, if you want to talk about matt or my flybacks, post in our threads please! mine is here. Matt (BlackPlasma) also has one on the old 4hv, but I am sure he would be happy to make a new one for you to talk about his work
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Flyback Driver inside a PC PSU box
I can also try "dual double flyback" since I have four similar secondaries - I will put two on each core. If I can get some monster arcs I will start a new thread 
I wanted to make fun from frying an old computer circuit board. I turned the driver on - and immediately an arc jumped *inside* the PC PSU box! 
It had jumped over 40mm which is over 40kv. Probably the circuit board connected to hv out dropped the flyback's resonant frequency near the running frequency resulting in huge voltage boost. Now I'm afraid of connecting anything big to the output 
. I have it connected to a small jaccobs ladder, 4 inchs at the top and it climbs a couple of inches above that with a thick orange arc, I don't I have pictures yet. I guess that's next. 