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Registered Member #977
Joined: Thu Aug 30 2007, 06:57PM
Location: England
Posts: 74
Hey there, this is my firs post here, but I've been a member for ages.
I made an iggy coil driver awhile ago when it worked it gave 2 inch sparks (60kv?) and was great fun. Then it broke so away it was with that, I took it out again and replaced the 555, sweet! more sparks. But then after a bit of run time it broke again, so i replaced the 555 and, yep, it works!
thats the circuit.
Okay before you tell me to replace the 2n3055, I will but I want to get this going as it is now. My guess is high voltage spikes wrecking the 555, Could I just put a filter cap between the circuit and Iggy coil?
Okay, we upgraded to a flat screen monitor (found it in a skip!) so obviously there was a crt monitor just innocently lying there.
This is what I found.
But I'm not to sure about it, if I'm right (prob not) the two red wires coming out the top (one has a big suction cup on it) are the secondry, and I just wind my primary on the graphite core.
If that flyback is useable what driver should I use? I would love to make a zvs but is it that easy for a second hv project?
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Yes, put a filter cap (few 1000s of uF) on the power supply, and put a small (0.1uF) ceramic or foil cap right across the 555 supply terminals.
You can get better performance if you replace the 2n3055 with a MOSFET, but that could actually kill the coil from too high voltage if it produces 2" spark with the 2n3055.
Maybe you wanted to post a picture of your flyback? If so try to re-post it, use the attachment upload function.
Registered Member #977
Joined: Thu Aug 30 2007, 06:57PM
Location: England
Posts: 74
Had another go.
The pics are bmp, the forum wont aaccept them, I'll try yet again.
Sorry aboot double post
Will this flyback be usable? I havent seen any pics of this flyaback on the interweb. I know the flyback's made by murata and is the focus model. How can I find all the right pins?
mod edit: 400 pixels max image width! Also, why not convert them to JPGs and they won't be so slow to load! sorry!
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
I think the flyback is somewhat usable... but it has built in HV capacitor, this makes it useless for drawing arcs (unless the cap has separate ground connection), it will just make bright sparks that can not be drawn.
You can wind your own primary winding on the exposed core, and drive it e.g. with the 555+MOSFET driver. Reverse the winding polarity if the flyback makes just little sparks.
Or if you want more power, build the "zvs" driver (google "zvs flyback driver")
Registered Member #977
Joined: Thu Aug 30 2007, 06:57PM
Location: England
Posts: 74
Bollocks, i was hoping to use it as a marx gen power supply, some good news though, our microwave broke. How would I find if the hv cap has seperate pins? Could I open it up and take it out? Guess I'll just have to look for another telly. Well I'm going to the electronics shop over the weekend to get the parts for the ignition coil driver. Once the ignition coil driver is going I'll put the flyback on it with a 10-12 turn primary, and I'll just bring the suction cap over the pins at the bottom and if I get good results I'll make a dedicated driver. My list is; another 555, a cap a few 100's of uf, small 0.1uf cap.
Registered Member #180
Joined: Thu Feb 16 2006, 02:12AM
Location: Ontario, Canada
Posts: 187
You could definately use that flyback for a marx gen, as long as it isn't shorted internally or something. Marx's need DC input not AC, your flyback right there puts out DC, not sure about that HV cap jmartis was talking about... Every flyback I've ever had was able to produce arcs, regardless if it had a built in multiplier.
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Iggy coil and flyback
