[sdiy] connectors for power distribution

[harrybissell]

Of course you can add soft start to any power supply... in fact for
large systems its a good idea and is often included in professional
designs.

I had to do this for a synth that drew 400mA from a 800mA supply...
the start up capacitance was too high. I used two resistors in series
with the supplies (15 ohms) then shorted them out with relay contacts
after one second. Click - ready

H^) harry

Oakley Sound wrote:
> 
>  > on each module a ferrite bead and something like a 22-47uF cap per
> power rail ...
> 
> Steady here. A lot of folk have had problems with big caps in the power
> rails. With largish systems the overall capacitance can get too big for
> the PSU to handle at initial power on. The current surge is sufficient
> to confuse the supplies current limiting.
> 
> I would recommend 4.7uF elec and 100nF poly at the point of entry. And
> then plenty of 100nF around the board too.
> 
> If your power supply is standard current limit and no foldback then you
> could load it up with as much capacitance as you wish. But those with
> foldback based designs [Condor, Power One, International Power et al.]
> may want to avoid excessive capacitance on the rails.
> 
> Tony
> 
> www.oakleysound.com