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Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
Generally it does... But more often than not you will get more current out the flyback, as the max voltage us usually limited by the breakdown voltage of the switch...
As to the 555 codes, for most applications any one will work. If you are running at a voltage >5v or frequency >500khz you need to type the exact code into alldatasheet.com to make sure that it can handle the voltage/frequency (the cmos versions can't handle as much voltage and the ttl versions can't handle as high frequencies)
Registered Member #241
Joined: Thu Feb 23 2006, 09:13PM
Location:
Posts: 19
Ok i will look up my 555 before i buy it. Ä° just tried a DC rectified flyback with a real simple driver using a single 2n3055 transistor. Ä°t was a single transistor driver with 2 resistors(how simple can you get?). Ä°t did a 2" spark at 24 volts but after 5 seconds the transistor got VERY hot and died out. After that i killed another the same way . Its so hard to wind DC flybacks primary and feedback windings... There is no room to wind the wire efficently is there an easier way? When i made arcs from the HV outputs there was big arcs from the connectors of the flyback. The singing sound they make from frequency is so nice..... i just love it
Registered Member #241
Joined: Thu Feb 23 2006, 09:13PM
Location:
Posts: 19
Part Scavenger wrote ...
Transistors dying with the 2n3055 circuit? Oh, that's normal. That's why it's cool for a while and then we switch to the ZVS or scopeboy circuit.
Sometimes you can chew more plastic out of the way, or take the core off to wind, but it's usually just as easy to poke it through.
i poked it through but it wasnt really a nice winding. It was very hard to poke the insulating tape through aswell. i am switching to scopeboy i got it all printed out here i will start on it as soon as i get all the parts but i am afraid that my flyback is badly wound anyway.. no one is born as a expert
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Double flyback driver??
anyway.. no one is born as a expert 