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  #1  
Old 05-29-2011, 07:30 AM
dany dany is offline
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Default 556 dual timer 12 volts to 110 or 220 volt inverter

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  
Old 11-21-2011, 03:56 PM
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Bill_Marsden Bill_Marsden is offline
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Please read the rules of the Completed Projects forum.

Quote:
When posting a project please include the following information:

1. A clear title that describes the project appended by the word 'Project:', for example "Project: 555 Audio Oscillator".
2. A list of parts, equipment, software used.
3. Details of any theory, references or information that may be applicable.
4. Any schematics, source code, etc.
5. A short description of what to do.
6. In the interests of manageability and security, project files/code/schematics must be locally stored. Links may be used to provide supplementary information, however they must not provide the substance of the project.
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).
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If you have a question, please start a thread/topic. I do not provide gratis assistance via PM nor E-mail, as that would violate the intent of this Board, which is sharing knowledge ... and deprives you of other knowledgeable input. Thanks for the verbage Wookie.
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Old 11-21-2011, 05:46 PM
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SgtWookie SgtWookie is offline
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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.
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If you have a question, please start a thread/topic. I do not provide gratis assistance via PM nor E-mail, as that would violate the intent of this Board, which is sharing knowledge ... and deprives you of other knowledgeable input.
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Old 11-21-2011, 08:42 PM
Audioguru Audioguru is offline
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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.
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Old 11-22-2011, 12:17 AM
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thatoneguy thatoneguy is offline
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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.
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Old 11-22-2011, 12:22 AM
bountyhunter bountyhunter is offline
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Or start a thread for the projects voted most likely to electrocute somebody...
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