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  • 250 to 5000 Watts PWM DC/AC 220V Power Inverter

    Anyone know how to make this circuit output a sine wave instead of square wave? Because square wave isn't good for sensitive electronic households like: electric fan, TVs, etc. I read somewhere that you could use 4017 IC to output a modified sine wave. Please reply thanks

    Problem solved. I accidently shorted the power stage and it causes the FET to generates high heat due to the high current drain. Thanks for your answer anyway.

    Problem solved. I accidently shorted the power stage and it causes the FET to generates high heat due to the high current drain. Thanks for your answer anyway.

    Problem solved. I accidently shorted the power stage and it causes the FET to generates high heat due to the high current drain. Thanks for your answer anyway.

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  • 250 to 5000 Watts PWM DC/AC 220V Power Inverter

    Hi Nick, it's me again. I finally built my first inverter based on your schematic (the one with MOSFET) but I replaced the IRFP250 and use IRFZ44N instead. I also removed the feedback transformer and connect the bridge rectifier (I used KBP307, with 3A ratings and 600V max. voltage) directly from the main transformer.The problem now is the inverter didn't work. I measured the voltages across the MOSFET without the transformer connected to it. The probes connected at the 'Drain' pin of the MOSFET and the others at the CT input of the transformer (or the Vcc which is 12 V in). The results are both of them had a different voltage, one MOSFET shows 10.1 V and the other one shows 5.78 V.When I connected the transfomer to the terminal block (which contains two MOSFETs and 12V Vcc) to the the ...

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    Hi Nick, it's me again. I finally built my first inverter based on your schematic (the one with MOSFET) but I replaced the IRFP250 and use IRFZ44N instead. I also removed the feedback transformer and connect the bridge rectifier (I used KBP307, with 3A ratings and 600V max. voltage) directly from the main transformer.The problem now is the inverter didn't work. I measured the voltages across the MOSFET without the transformer connected to it. The probes connected at the 'Drain' pin of the MOSFET and the others at the CT input of the transformer (or the Vcc which is 12 V in). The results are both of them had a different voltage, one MOSFET shows 10.1 V and the other one shows 5.78 V.When I connected the transfomer to the terminal block (which contains two MOSFETs and 12V Vcc) to the the transformer primary windings (12-0-12). I measured the voltage drops at the main input terminal and it shows about 8V-to-11,1V while the battery is measured at 12,67 V.And also the MOSFETs seem only work alone (The ones getting very hot and sometimes the two getting hot together) these conditions can be swapped, I mean it can be the upper MOSFET connected to the pin-14 or the MOSFET at the pin-11 of the SG3524 that getting hot while the other stays cold.Here's my schematic diagram compared to yours.

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  • wh1teshadow commented on How-ToDo's instructable Powerful Burning Laser9 months ago
    Powerful Burning Laser

    Hi elufo, I wanna know.Which circuit driver you use for these LASER?

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