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vicky.pace
Joined: 05 May 2008
Posts: 33
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 04 Nov 2009 11:54 Off delay Timer |
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Dear All,
I want to make a OFF DELAY TIMER which switch over after power goes. It works with power stored inside the circuit and switches relay after set time i.e. 0-60 sec.
There will not be any battery inside.
Please suggest.
Regards
Vicky
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pranam77
Joined: 22 Apr 2008
Posts: 1071
Helped: 94
Location: Mangalore(India)
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04 Nov 2009 13:49 Re: Off delay Timer |
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| vicky.pace wrote: |
| Dear All, I want to make a OFF DELAY TIMER which switch over after power goes. It works with power stored inside the circuit and switches relay after set time i.e. 0-60 sec. There will not be any battery inside. Please suggest. Regards Vicky |
Without a battery inside, how can you switch a load like relay during power failure? even Super Caps cannot power such loads. I think a battery is mandatory. Cheers
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04 Nov 2009 13:49 Ads |
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FvM
Joined: 22 Jan 2008
Posts: 5160
Helped: 767
Location: Bochum, Germany
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04 Nov 2009 14:46 Off delay Timer without battery |
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To make the relay specification understandable, you should tell what's actually switched by it. With out any power source,
nothing can be switched, even if the relay has a suitable backup power.
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nandhu015
Joined: 11 Feb 2006
Posts: 640
Helped: 46
Location: Tamilnadu, India
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04 Nov 2009 15:19 Off delay Timer without battery |
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Try using supercapacitor
A little info about supercapacitor
http://www.batteryuniversity.com/partone-8.htm
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vicky.pace
Joined: 05 May 2008
Posts: 33
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04 Nov 2009 16:43 Re: Off delay Timer without battery |
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In fact we may use A latching relay for this.
Vicky
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