On 22/09/2010 4:08 PM, Ruben J=F6nsson wrote:
> But where do you get the 15V from? Mains transformer, rectifier and a cap=
? Then
> you need to consider the tolerance of the mains power, that you have a ri=
pple
> on the input to the regulator and that the voltage varies with load (perh=
aps
> not a big problem here since you need quite a big transformer).
>
> If the circuit needs to work with ripple free output voltage from the
> regulators you will find that the input will be a lot more than 15V (peak=
) in
> normal cases if it is also going to work at worst case.

In my case, I would probably use a 200W frame type SMPS tweaked to 15V.
David...

--=20
___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.