audioguru

You have been given high voltage low current Mosfets. The inverter needs high current low voltage Mosfets.
The transformer is too small.

All the parts are wrong for that extremely simple circuit.

With the low current Mosfets and tiny transformer then your project might light a 230V 7W night light dimly. I doubt its square-wave would power a clock radio.

Who is doing the project? Them or you?

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Uncle $crooge

JAMES IRVINE

It's a cowboy college who cut corners with everything, well thanks for telling me now I know I need new components, at least now I wont look stupid building it. The thing is I've did a lot on theory, I've more material than anyone on my course so I should at least get a pass and thanks to you now I can get on there nerves by pointing out how they messed up.
Just out of curiosity and ignorance how easy are these components to get from high street shops and how much cost would I be looking at.

audioguru

You could make this extremely simple inverter for about 5 times the cost of buying a new modern modified sine-wave one that has a lot more power and a display showing the power output and current used. But they are made in China so they might not last very long.

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Uncle $crooge

JAMES IRVINE

Well the college has told me that I should just use a 12 watt light bulb for the load, that will work with a squarewave anyway wont it. Thanks for the info Uncle scrooge, they told me to stick with what I have and stop worrying about it so if it doesnt work it's not my fault. Told you it was a cowboy college.

ericgibbs

hi James,
The 12Watt should be OK for testing, the transformer is 12Vac * 2 = 24VA[watts]

Told you it was a cowboy college.

I hope you win your 'spurs' when you submit your assignment...

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

audioguru

If the 12W bulb is an electronic Compact Fluorescent Light Bulb then it might not work from the square-wave from the simple inverter circuit.

I have never seen a 12W incandescent light bulb that will work.

__________________
Uncle $crooge

JAMES IRVINE

Any suggestions for a load uncle scrooge.
Thanks Eric for the encouragement, a lot of my good knowledge about circuits is down to u and uncle scrooge so thanks for that.
I thought I might as well say it come on the Glasgow Rangers.

audioguru

I don't know any electrical device that operates with only 12W.
The inverter might power two 5W or 7w incandescent night light bulbs.

__________________
Uncle $crooge