Re: [LinkStation_General] Restart on Power Failure?!
- --- Schelte Bron <sbron@...> wrote:
> On Saturday 07 January 2006 00:11, KeepItYour correct with the part number that you selected.
> SimpleStupid wrote:
> > Try this on for size:
> > Disconnect the switch from the non ground side.
> > the switch point (b) and the circuit board side
> > (b).
> > Connect the anodes of two 1n4001 diodes together
> > connect to point (b).
> > Connect the cathode of one of the diodes to point
> > Connect the cathode of the other to your cap and
> > negative of the cap to ground.
> > In this case the diodes create isolation and there
> > no issue of a cap across the switch.
> > If you cannot unsolder both ends of the switch,
> > go to plan (b).
> > Obtain p/n CNC1H001CT-ND from www.digi-key.com.
> > Connect pins 4 and 6 across the switch. Polarity
> > doesn't matter.
> > Make R=(Vcc-1.2)/10mA. Vcc could be 3.3, 5 or
> > 12V and pull this resistor to this voltage.
> > the other end of this resistor to pin #1 and a cap
> > from pin 2 to ground observing polarity. Make 5 *
> R *
> > C about equal to (0.1 to 0.5 where R is in ohms,
> and C
> > is in Farads.
> Thanks for thinking along with me, but I think
> there's a slight
> miscommunication. The setup I proposed works, is
> about as
> simple as it gets and has a reasonable reset time (3
> My only question was if anyone sees any problems
> with that
> If you look at the picture I included in the wiki
> article you
> will see that your plan A is not going to work
> unsoldering the switch cannot be done without a big
> risk of
> damaging the LS.
> Your plan B doesn't sound simpler than my proposal
> and I don't
> see how it could work. The part number you mentioned
> is a 16
> pin SMD 4-port opto-isolator and you seem to be
> using pins from
> different ports. I assume you meant something like
> p/n H11F1-ND
> or similar, but then the circuit is still more
> complicated than
> mine and I don't see any advantages.
> So unless you can point me to any dangers for the LS
> using my
> setup, I'm going to go with that.
So one cap, 1 IC and 2 resistors you should have
something that works and keeps the functionality of
Many years ago, like 20, I used this technique to turn
off an audio processor when the AMP turned off. I
also had the ability to turn the audio system on via
the processors remote, Still works.
Weird switches (Dedicated off)
ON (one push -20 db, 2nd push 0 db)
Since the circuitry was external, isolation was
Thanks for catching the errors.
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