[sdiy] P-p-power!!!

Jarno Verhoeven@ziggo.nl jarno.verhoeven at ziggo.nl
Tue Apr 16 09:30:34 CEST 2019


+1 to Neils' suggestion, for instance, look at the schematic for the CPS150
power supply.
 

> Op 16 april 2019 om 9:18 schreef Neil Johnson <neil.johnson71 at gmail.com>:
> 
>   
>    > >    Google for
> >     
> >    Mutual shutdown power supplies
> >     
> >    Larger mixing desk power supplies often have this function. Check the
> > power supply section in Self's SSAD. 
> >     
> >    Neil
> >     
> >     
> >     
> > 
> >    On Tue, 16 Apr 2019, 04:09 Tim Ressel, < timr at circuitabbey.com
> > mailto:timr at circuitabbey.com > wrote:
> >      > > > Yo,
> > > 
> > >      I am putting together a power supply for my new 5U case. At first I
> > > just
> > >      have 7815 and 7915 regulators. But then it occurred to me: would it
> > > not
> > >      be indeed nice to have both rails fold back if one over currents? to
> > >      answer my own question, why yes, yes it would.
> > > 
> > >      So now to make it work. I thought of using LM317 and LM337s and do a
> > >      cross-over thing. Use an op-amp to servo off of a virtual ground set
> > > up
> > >      with a voltage divider. I am not sure if that will do what I want. I
> > >      guess I can try it with the 'L' versions; easier to put into
> > > foldback.
> > > 
> > >      I also thought of using LM723s but that gets complicated in a hurry.
> > >      More than I want.
> > > 
> > >      Thoughts?
> > > 
> > >      --Tim (musing aloud) Ressel
> > > 
> > >      --
> > >      --Tim Ressel
> > >      Circuit Abbey
> > >      timr at circuitabbey.com mailto:timr at circuitabbey.com
> > > 
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