problem in 12v to 230v inverter

[devmania]

hello,
i have made an inverter using cd4047 as per the circuit diagram i have uploaded here.. as per the circuit diagram gate pulse are given to the mosfet from pin 10 and pin 11 of the IC . but when i apply 12v to the ic i am getting 12v at pin 10 but not getting any voltage at pin 11 but i am getting 12v from pin 13 so i have connected 100ohm resistor to pin13 . but still i am not getting output from the transformer. i am using a 12-0-12v to 230v center tapped 1.5amp transformer. please tell me where is the fault in my circuit?

[pebe]

Pin 13 is a buffered output from the oscillator. It is a square wave of approximately equal on/off times, so you should get about 6V output from it.

If you are getting the full 12V of the supply it is a sure sign that the oscillator is not working. Re-check components and connections at pins 1, 2, and 3.

[MartinJ]

The signal on the gate of MOSFETs should be always square as pebe mentioned.
Do you have a chance to use oscilloscope? This would make great job for you. You would actually see the squares and voltage level. This signl is very important for feeding the gates of MOSFETs and actually switching them.

You may also study datasheet. There is described each pin and what level it should be. You can also experiment with the pins and see what it does. Before you do so, disconnect gates and put some resistors instead so you will not damage MOSFETs.

Martin