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273 posts

Ultimate Geek

#233372 13-Apr-2018 14:33
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Anyone got any suggestions about how to use (or build) a 12 volt trigger with a sequential time delay to start up amplifiers in sequence instead of all at once?




I am using the standard 12 volt triggers and also a power Master/Slave board AND a relay (see pic) for a pro amplifier that uses a Phoenix connector to active it or put it to sleep.


Another similar relay has configurable time on/off (see 3rd pic) but this still requires the Phoenix AUX pro amp interface. 




So; how to power domestic amplifiers on in sequence (say...5 seconds after each other - four in  total.)




Any ideas?








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5818 posts

Uber Geek

  #1995582 13-Apr-2018 15:48
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I've seen adjustable delay modules for automotive use.  You could use a bunch of those to control your main relays.


Connect them all to the 12v trigger from your receiver and set them to different intervals.




A microprocessor and relay shield will do the job more compactly but you would have to write code.


273 posts

Ultimate Geek

  #1995595 13-Apr-2018 15:54
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Yeah I've seen them too.


The thing I don't quite get is how to configure them for 220 volt use.


The relays are dome a dozen (or about $5 shipped from Ebay) - but how to get them with 220v?


The obvious solution is to ditch domestic amps and go with pro amps that use the Phoenix connectors it's way easier to do that with a time sequence relay in the line.




240 posts

Master Geek

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  #1995787 13-Apr-2018 23:53
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Have you considered something the Logitech Harmony Hub to use a startup delay?


Click to see full size



273 posts

Ultimate Geek

  #1995859 14-Apr-2018 07:19
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The system is installed in a house with no internet access.


And this has has to be automated from turn on - the simplest solution is to use a power strip Master/Slave function and take the hit when four NAD 218s power up together.


I can delay the other professional amp turn-on by using a timer relay and the Phoenix connector and it would be simple to use 


The other way would be to do it manually with a remote turn on with all NADS on the same power strip - pushed manually once the other gear had started up.




It is a little surprising there isn't something like this Master/Slave board WITH the added feature of a small dial above each socket delaying turn on by 5-30 seconds.




746 posts

Ultimate Geek


  #1995873 14-Apr-2018 08:10
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I wonder if something like this might be what you are after?

There just so happens to be one on trade me at the moment -1594420174.

273 posts

Ultimate Geek

  #1995875 14-Apr-2018 08:16
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Thank you - yes that's it.


Furman also make one: 



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