Problem with making inverter

[New Student]

The datasheet for the IRF540 Mosfet shows that its maximum allowed current is much more than 6A. Then it will get hot so a heatsink must be used and its size can be calculated.
You never told us the maximum power rating of your transformer. For more power usually a larger transformer is used instead of paralleling more little transformers.

My transformer 3 amp 12-0-12.. oh i see so it better use a large one transformer

 

[Audioguru]

Measure the output voltage with a 10.4W load (10.4W/230V= 45.2mA. 230V/45.2mA= 5.1k ohms. Then watch the transformer voltage drop as it is overloaded with 104W. 104W/230V= 452mA. 230V/452mA= 510 ohms.

 

[New Student]

Measure the output voltage with a 10.4W load (10.4W/230V= 45.2mA. 230V/45.2mA= 5.1k ohms. Then watch the transformer voltage drop as it is overloaded with 104W. 104W/230V= 452mA. 230V/452mA= 510 ohms.

Nice sir thanks for that.. i will try