yes the trnsformer have abig noise but its cool now i change lm358 with cd4011 us two gate frome it ....my english not good can you translat my arabic writing you now we have big broblem with electricity in iraq and the heat reach 45 and no benzine for generatr i have old inverter i us it for 6 years tl494 with irfz44n but its for my family to operating roof fan so you know now why i look for agood inverter and for my pc to contact with the world by d-link wireless....i hope im not bother any one