556 dual timer 12 volts to 110 or 220 volt inverter

Discussion in 'General Electronics Chat' started by dany, May 29, 2011.

  1. dany

    dany Thread Starter New Member

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    Hello everyone,
    This is a 556 dual timer 12 volts to 220 volts 50hz 50% duty cycle inverter circuit.It is capable of outputting 500-600 watts at 190 to 200 volts output.... (you should heatsink the MOSFETS)....

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  2. Bill_Marsden

    Bill_Marsden Moderator Staff Member

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    Please read the rules of the Completed Projects forum.

    This project has sat in limbo basically because it didn't meet the above requirements. If you want to resubmit this entry please rework the entry to meet the requirements, then drop one of the moderators a PM pointing to it. If it is acceptable a moderator can move it back to the Completed Projects forum and clean up notices and suggestions (making them invisible).
  3. SgtWookie

    SgtWookie Expert

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    1) The circuit as presented is not functional, as once the MOSFETs turned ON, the circuit would never turn them off; there is no current path to discharge the MOSFETs.
    2) The duty cycle is NOT 50%, as with the standard 555 timer astable multivibrator scheme you have used, the ON time is always greater than the OFF time.
    3) You have specified resistors that are not standard values for R1 and R2, and even if they were standard values, there are no provisions to calibrate the output frequency.

    This is obviously a circuit that was simply simulated, and not tested - although I don't see how it would work in a simulator either.
  4. Audioguru

    Audioguru New Member

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    Many electronic products do not work from its square-wave output.
    Its output voltage is not regulated so it will be too high with a light load and be too low with a heavy load.

    It does not sense when the battery is exhausted so the battery will keep powering it until the battery is destroyed.

    It doesn't have a fuse or circuit breaker in case of overload so it and/or the battery will simply explode or catch on fire.
  5. thatoneguy

    thatoneguy AAC Fanatic!

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    I'd suggest deleting the thread before another bad inverter circuit is foisted onto the already huge pile all around the web.

    OP: Start a thread and we can try to help with the deficiencies of this one, though I'm not sure where to start.
  6. bountyhunter

    bountyhunter Well-Known Member

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    Or start a thread for the projects voted most likely to electrocute somebody...
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