Mains adaptor low current PSU

[ash_dac]

Hi,


Has anyone tried to build a low power powersupply using a
mobile phone mains adaptor or similar being fed into voltage regulators?

If so, any potential issues?

The two applications would be for a cdplayer XO (probably a Tent
clock eventually), and powering a TDA1543 dac built inside a cdplayer. They are both low current applications.


Regards,


Ash.

 

[namnguyen2003]

Need help on transformer...

Hi. Anyone here know what kind of transformer do I need to build electrstatic? can I use any kind of audio transformer or it need to be some specific one.

please email me at

nam.nguyen@mail.sprint.com


Thanks
Nam

 

[Bill Fitzpatrick]

That's it nammy. Just grab the thread right away from ash. Jeez.

 

[paulb]

Has anyone tried to build a low power powersupply using a
mobile phone mains adaptor or similar being fed into voltage regulators?

Do you mean using a wall wart? Should work fine, unless it has a DC output and you need a +/- supply. You could generate the negative supply I suppose.
I am using one with an AC output, using two half-wave rectifiers to give me a +/- supply. Other than having to filter it well, no issues. It's running an LM1875 power amp.

 

[ash_dac]

Hi,

Think i might go for the ac route as you suggest.

Regards,


Ashley

 

[paulb]

If you're going with AC, take a look at power supply projects 5 and 5A at www.sound.au.com .