hello forum. thnx to your help i have made something like this working (although its not what we discussed, and it's faaaar from efficient
)
The transformer is 1-1 ratio. Its a transformer i salvaged from old electronics, so i have no idea about what freq its for
The controller , PWM's the mosfet at 31Khz ! The voltage input is 12v, and the output is about 9v
So, a couple of questions
1)what circuit do i need, to change the controller for a 555 timer??
2)what can i do to improve it noise-wise ?
3)what do i need to increase the output current??
4)you think that the voltage drop happens, cause of bad freq used on the transformer, or because of bad topology?? (btw the mosfet heats up ALLOT
)