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I found about 500 sites related to build your own power supply in one search.
But since I slept well and am feeling nice, here are three simple ones.
All specs and design info are on the data sheets too!
Roman Blacks two transistor SMS
Official Home Page of Roman Black
Hehe, I was just about to post a link to my simple switching regulator and saw you beat me too it!
And a disclaimer! My design is not particularly suited to converting 220vac to 5v. It can be done but is dangerous even for an experienced designer AND even then ALL parts of the circuit will be "live" at lethal potential.
thank u, but your system has a "small" drownback, input is derectly connected as output
can I use a ferrite tranformer instead of inductor ? I seens partial schem that use this technique.
Hehe, I was just about to post a link to my simple switching regulator and saw you beat me too it!
And a disclaimer! My design is not particularly suited to converting 220vac to 5v. It can be done but is dangerous even for an experienced designer AND even then ALL parts of the circuit will be "live" at lethal potential.