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Delayed relay output?


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icarus_icarus 
Copper - Posts: 229
Copper spacespace
Joined: November 01, 2005
Location: Ontario, Canada
Posted: November 03, 2005 at 7:07 PM / IP Logged  

I just wanted to say I've been browsing around the forum for a while reading different items, learning a fair bit from everyone and have liked what I've seen! Now I have decided to join and ask for some help!

I was looking at the diagram below from this site and the one on "Momentary to Constant Output" , is there any way anyone knows that I could use something similar to these (combine them somehow), but using a (7/10sec.) accessory pulse from a remote starter to turn on a 10 minute delay to power up a defrost grid? I was going to hook a relay across the factory switch, but the connections to turn it on properly are internal and I don't feel like breaking open the switch.

If this is possible, what size capacitor would I need to make it stay on for approx 10-12 minutes?

Delayed relay output? -- posted image.

Thanks for any help you can provide.

I will keep reading through the forums to see what else I can find as well!

Jon

fingaz22 
Silver - Posts: 410
Silver spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: March 11, 2005
Location: United States
Posted: November 03, 2005 at 7:54 PM / IP Logged  
you have the wrong diagram you can use just one relay and get your 12v turn on for the relay from the ass. wire on rs. put a diode inbetween the factory harness and where you tap the wire coming out of the rs. so it will shut off when you press the brake and the diode will prevent juice getting back through the wire to the relay from the ign. ass.
JUST ONE MORE AMP!!!
hu,alpine cva 1005/dva 5205
sound processor,symmetry(first one).
sub amp,power 1000 the terminator.(1992).
subs,spl comp dual 1 ohms.
punch 150hd on a 10" ev.
alotofhighs
icarus_icarus 
Copper - Posts: 229
Copper spacespace
Joined: November 01, 2005
Location: Ontario, Canada
Posted: November 03, 2005 at 11:50 PM / IP Logged  

Yah, I was thinking of doing that at first as well, but want to be able to control it so it's used only when needed... I've been watching the info in the other guys thread that is in a similar dilemma as me that you posted in too fingaz.

I was hoping there would be some way to get it so its timed longer (the diagram I posted says it will stay on for only 1/2 sec., I need about 10-12 minutes) plus I wanted it triggered by the momentary output on my RS like I mentioned... Unfortunately my output in not programmable, just a 7/10sec. pulse it supplies...

fingaz22 
Silver - Posts: 410
Silver spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: March 11, 2005
Location: United States
Posted: November 04, 2005 at 6:59 AM / IP Logged  
well i had that in mind but it will not shut off like a factory one will. if you were to use the momentary to constant. and like in the other tread if you can tap into the defrost switch and it is the same style switch that will work. what kind of car and what year i will look up your defrost curcuit and be able to help alot better. lol
JUST ONE MORE AMP!!!
hu,alpine cva 1005/dva 5205
sound processor,symmetry(first one).
sub amp,power 1000 the terminator.(1992).
subs,spl comp dual 1 ohms.
punch 150hd on a 10" ev.
alotofhighs
dualsport 
Silver - Posts: 983
Silver spacespace
Joined: September 27, 2005
Location: United States
Posted: November 04, 2005 at 9:14 AM / IP Logged  
Take a look at this Post
and see if you can try that to provide your timed output. The circuit he drew out is for a short pulse output, but you should be able to use it too-
You just need to use a larger cap and resistor to stretch out the 'on' time.
icarus_icarus 
Copper - Posts: 229
Copper spacespace
Joined: November 01, 2005
Location: Ontario, Canada
Posted: November 04, 2005 at 4:07 PM / IP Logged  

I can post up a pic of the defrost circuit for you if ya want, but the one side of the timed circuit is internal. I even had the switch out and tried taking it about, but don't want to screw it up...

I'll dig it out and show it to ya when I plug in my scanner :)

Thanks

kgerry 
Platinum - Posts: 3,455
Platinum spaceThis member consistently provides reliable informationspace
Joined: February 07, 2004
Location: Saskatchewan, Canada
Posted: November 04, 2005 at 4:21 PM / IP Logged  
most newer RS units have a dedicated defroster output..... you may want to check the unit you are putting and save yourself a bunch of time....
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
icarus_icarus 
Copper - Posts: 229
Copper spacespace
Joined: November 01, 2005
Location: Ontario, Canada
Posted: November 04, 2005 at 7:33 PM / IP Logged  

The unit I have is just a cheaper AutoStart unit from Canadian tire... It doesn't have a seperate wire for the defrost nor is it very programable with its options :(

dualsport 
Silver - Posts: 983
Silver spacespace
Joined: September 27, 2005
Location: United States
Posted: November 04, 2005 at 8:16 PM / IP Logged  
If you don't want to get into the factory switch, then wire it up to the defroster grid inputs using the add on timed relay. I assume that's where you're planning to connect to.
Then you can just pulse it once with your alarm and have it come on for a short time before turning off again.
icarus_icarus 
Copper - Posts: 229
Copper spacespace
Joined: November 01, 2005
Location: Ontario, Canada
Posted: November 04, 2005 at 8:31 PM / IP Logged  

That's what I'm trying to figure out... How to supply power to the actual defrost wire with a relay setup that is actuated with a pulsed output from the RS and is timed for 10 minutes or so (bypassing the factory switch)...

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