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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
If you can, pick TV's rather than monitors. Because monitors usually have a flyback with built-in high voltage capacitor, they are useless for drawing arcs. Most TV's have a flyback without the HV cap. Edit> IMO new and big without built-in HV cap is the best. These produce much longer arch for the same input power than the old unrectified ones. They are also often surprisingly tough (I have pushed ~600W through one, and my driver got hotter than the flyback.)
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
In old tvs the flyback had no included diode or dublier circuit and on places like ebay or information unlimited you can find flybacks with just a flying leed. Some times they put out more voltage. A flying leed is benifcial because you can chose the polarity with the circuitry that you chose. you can use one flyback to drive two dublier of opisit polarity for twice the voltage.
Registered Member #809
Joined: Wed May 30 2007, 08:59AM
Location: Melbourne, victoria
Posts: 114
i got a monitor today a got the flyback out of it, it's one of the ones with the horseshoe pins. but there is another thing joined to the flyback with some knobs on it saying focus1 focus2 and screen, and three pins on the bottom? what is this?
Registered Member #809
Joined: Wed May 30 2007, 08:59AM
Location: Melbourne, victoria
Posts: 114
i made up this chart, it shows which pins are connected to each other. i blew up my multimeter so i used a fan, a 9v power supply and some wires, so i couldn't get resistance measurements so what do you think the primary and feedback coils are? oh, and i am intending to run it with the circuit, you know, the one with the single transistor and two resistors, wil this work?
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
... wrote ...
The thing attached to the flyback is a voltage doubler, the pots are used to focus the tv (and are useless to you)
I often hear people saying that it's a voltage doubler, but I think this is not the case. The flyback's secondary is divided into several sections separated by HV diodes. The output is filtered by a HV cap (usually 2-3nF@50kV). So the cylindrical thing attached to the flyback is the HV cap, and under or beside it is the "pile" of HV diodes.
Registered Member #809
Joined: Wed May 30 2007, 08:59AM
Location: Melbourne, victoria
Posts: 114
this picture is of the pin configuration. what are the 3 pins down the side for? which ones do you think are the coils? oh, i looked on the back of the circuit board where the flyback was, and found that pins 10, 8 and 3 were not used in the monitor. when i hook it up to this circuit, i can't hear anything or see anything
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Flyback?
so what do you think the primary and feedback coils are? oh, and i am intending to run it with the circuit, you know, the one with the single transistor and two resistors, wil this work?
