hello, i am a noobie. recently i need to make a step down transformer. i have DC 9V,350ma as my input and now i want DC 5V, 2000mah. also i want less ware form the collector base. i want to create the transformer on my own.please suggest me about ware gaze and the necessary equipment with diagram if possible. thanks in advance.
actually i want that for making mutual induction for my battery charging.
i have a charger that can give output as follows 1.5v,3v,4.5,6v,9v,12v and 350mA max.please help me.

 

You can't get 5 volts at 2 amps (10 Watts.) from an input of 9 volts at 350 mA (3.15 Watts.) Even if you use your 12 volts at 350 mA supply this is only 4.2 Watts.

Les.

 

please suggest me about ware gaze

Eh?

 

Transformers don't create energy, they just transform it.
And they only work for AC, not DC.

 

You can't get 5 volts at 2 amps (10 Watts.) from an input of 9 volts at 350 mA (3.15 Watts.) Even if you use your 12 volts at 350 mA supply this is only 4.2 Watts.

Les.

ok if i try 5V, 2A as input then can i make (3~5)V, (100mA~2A). possible???

 

Transformers don't create energy, they just transform it.
And they only work for AC, not DC.

If i try to gain same volt and current then is it possible to convert DC to DC. what happen while converting DC to DC.please explain, thanks.

 

A voltage divider (two resistors) can convert a given DC voltage to a lower DC voltage, but to get a higher voltage you would usually first convert the given DC into AC of a higher voltage then rectify that higher AC voltage to get DC.