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Registered Member #809
Joined: Wed May 30 2007, 08:59AM
Location: Melbourne, victoria
Posts: 114
just because i could, i got 2 10kv 100pf caps and hooked them to the output. when i turned it on, the arcs was soo noisy, and it was very bright (my eyes hurt now!!) so if i can get these kind off sparks out of two caps, i think it's time for a flyback driven tesla coil!
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Mine only fires the gap at about 3 or 4 Hz, so you don't get resonance...
Actually you still get resonance, it's just that there's too little energy for streamers to break out. Resonance action occurs while the arc exists, and lasts until the capacitor is discharged/arc extinguishes.
i tried to make one of those high voltage lifters with my first ignition coil driver...
Lifters need DC to work not AC, so your current flyback should work.
Registered Member #809
Joined: Wed May 30 2007, 08:59AM
Location: Melbourne, victoria
Posts: 114
yes i realised it needed dc after i tried it with the ignition coils. with the high voltage lifter, do you have to connect anything to the foil down the bottom?because i can't seem to get it to lift? maybe i need to make it bigger? i am havin fun with this flyback, especially when it's just about to spark but it can't, so i get this big patch of purple glow!! would it be possible to audio modulate a flyback?
Registered Member #809
Joined: Wed May 30 2007, 08:59AM
Location: Melbourne, victoria
Posts: 114
in my first few pictures of the flyback, notice the 3 wires coming out of the flyback? when i bring the high voltage wire near the red one, there is tiny little arcs, then when i bring it near the white one, i get pulsing arcs, and finally if i put the high voltage wire near the red one for a little while, then put it near the gray one, a big fat noisy spark jumps down the 3 pins and to the ground on the bottom of the flyack? that must be the voltage doubler circuit right?
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
I don't know of anyone trying to audio modulate a flyback driven with a transistor. You could try and see what happens. People had audio modulated the ZVS driver before.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
kv wrote ...
in my first few pictures of the flyback, notice the 3 wires coming out of the flyback? when i bring the high voltage wire near the red one, there is tiny little arcs, then when i bring it near the white one, i get pulsing arcs, and finally if i put the high voltage wire near the red one for a little while, then put it near the gray one, a big fat noisy spark jumps down the 3 pins and to the ground on the bottom of the flyack? that must be the voltage doubler circuit right?
The fat sparks are from the HV capacitor discharging.
For the audiomodulated arc, you can use a PWM chip (eg. SG3525) to drive a transistor and connect the audio input to the PWM pin of the chip.
Registered Member #809
Joined: Wed May 30 2007, 08:59AM
Location: Melbourne, victoria
Posts: 114
i have had great sucess with this flyback, here are some vids i made of it. in both of the vids, the setup is identical, except for the second one where i connected the voltage multiplier into the circuit. the regular arcs, the description says it all. http://youtube.com/watch?v=ctTIsnZkNEk this is with the inbuilt voltage multiplier connected. http://youtube.com/watch?v=1F8zc6jBJuo
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Flyback?
