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Project: Fluoro Lamp Power Inverter (12v)

Discussion in 'Electronic Projects' started by hsab, Mar 23, 2005.

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  1. mneary

    mneary New Member

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    This has been covered many times, and misunderstood almost as much. An asymmetric primary drive usually causes an asymmetric secondary voltage. There is indeed no DC in the secondary, if the load is resistive. However, a fluorescent tube isn't resistive. The tube will only conduct when the voltage is high enough. Since the voltage isn't symmetrical, this can mean that the tube only conducts on half of the cycle and acts as a half wave rectifier.
     
  2. Hero999

    Hero999 Banned

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    Thanks, I'll post a link to your post everytime I see one of these crappy circuits.
     
  3. tonigau

    tonigau Member

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    I am all for building stuff for fun, pride & learning but when I found the small inverters "CFLINV" from oatley electronics I abandoned my fluro project & bought a box of em at 4$ each. They start well cold (frosty morning) & so far tube life has been good. I get about 14W from an 18W tube (i think, damm memory)

    I have the 18Wtubes in my shed & caravan from 12V & plenty bright enough.

    Attached is sch I traced out from PCB.

    These inverters are actually from 12V CFL lamps.
     

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  4. dave

    Dave New Member

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  5. Hero999

    Hero999 Banned

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    It looks like you picked up a bargin.

    It's nothing special though, just a typical Royer converter like nearly every other inverter out there.
     
  6. Snatten

    Snatten New Member

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    Hi guys!
    Can someone help me with schematics for a ballast that can drive 4 40W tubes and run on 325V DC (ie. rectified 220V AC)? I have a bunch of 2SC2526 transistors lying around and some E-cores from AT-powersupply's, they should be usable?

    Thanks in advance.

    Edit:
    That'll be 325V dc
     
    Last edited: Sep 17, 2008
  7. DexterDude

    DexterDude New Member

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  8. Snatten

    Snatten New Member

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    Well, I can see a couple of schematics there, but as I am not so clever with polish, I don't understand much... doesn't look like a FL ballast to me. :p
     
  9. Disco Elephant

    Disco Elephant New Member

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    First thing I noticed is that it doesn't pre-heat the filaments. Not sure, but I think that cuts down on the life of the tube.
     
  10. DexterDude

    DexterDude New Member

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    Last edited: Oct 28, 2008
  11. Disco Elephant

    Disco Elephant New Member

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  12. imanxx_81

    imanxx_81 New Member

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    hi
    very good
     
  13. nil213_gaikwad

    nil213_gaikwad New Member

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    hi, hsab,
    i am studant of tybsc. electronics. in this year i want to do the project so can you help me for that. my email id is
    nil213_gaikwad@yahoo.co.in
    &
    nileshsgaikwad@hotmail.com
    ok. plz rpl soon.
     
  14. red light

    red light New Member

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    very nice
    thank you
     
  15. enifeniqudus

    enifeniqudus New Member

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    I NEED A CCT DIAGRAM FOR 500W & 1000W INVERTER WITH THE VOLTAGE VALUES OF THE REQUIRE CAPACITORS. My e-mail addess is enifeniqudus@yahoo.com.
     
  16. nathan_alonsabe

    nathan_alonsabe New Member

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    I am a hobbyist. I need a 500 watts simple power inverter with pcb design and parts overlay. Please help me. Merry Christmas to all.
     
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