Power supply circuit for +/- 15V and 9V output, with input of 230V AC

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sivamit

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Hi,
i want to design a power supply for +/- 15 V and 9 V output. The input to the unit is 230VAC supply. Can anyone give me a circuit to implement this ..
please.....
And which power supply is better tranformerless or tranformer circuit?
Please suggest....
 

Re: power supply circuit

Go for something that you can easily build ..

Here is an example of dual-polarity regulated power supply ..
**broken link removed**
Just add another section with LM317 voltage reguator and adjust output to 9V ..

Alternatively, and without many changes, you can replace LM317 and LM337 adjustable regulators with the following fixed regulators:LM7815 (+15V output), LM7915 (-15V output) and LM7809 (+9V output) ..

Regards,
IanP
 

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