Power supply for audio devices

[Burned_Cap]

Hello everyone, im doing a small 5v/100ma power supply to power like pedals and switches for guitars, etc.
The thing is i cant really make up my mind on what capacitors to use, because the noise needs to be as low as possible.
Does anyone know some schematics proper for this ???

 

[alexan_e]

Have you used a regulator like LM317? (It has better ripple rejection than 7805)
The practical rule about bridge capacitors is about 1000uF /Ampere so a value of about 220 would be fine.

Alex

 

[Burned_Cap]

Ill check that, thanks for the advice, i was gona use the 7805, also would using an inductor help on something ?

 

[alexan_e]

I have never used an inductor in audio circuit but I think will make the output worse since it will give a hard time to the regulator output and can also increase the impedance.

Alex

 

[Burned_Cap]

I have seen an 10nH, on the input on some schematics to reduce noise from the input.

 

[alexan_e]

This is so low that it can only filter very high frequency (interference), I meant a coil to help filter the ripple of the psu

Alex