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timed relay


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geordie_racer 
Member - Posts: 9
Member spacespace
Joined: February 23, 2003
Location: United Kingdom
Posted: February 23, 2003 at 1:30 PM / IP Logged  

could some1 please tell me how 2 make a timed relay 2 do the following,

when i press a button i need a relay 2 energise a solenoid 4 5 seconds then deactivate it how do i go about doing this?

cheers chris

jrilla 
Gold - Posts: 1,498
Gold spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: November 19, 2002
Location: North Dakota, United States
Posted: February 23, 2003 at 6:31 PM / IP Logged  
I am curious what purpose the solenoid is going to serve. I was thinking about doing the same thing for a carburated chevy. I havent quite convinced myself of the safest way to do this. This link will take you to the relays page, look at the first diagram, but you will need a larger cap to get 4.5 seconds. I think something like a 10K microfarat cap is close.
https://www.the12volt.com/relays/page5.asp
J Rilla
Owner/Installer
jrilla 
Gold - Posts: 1,498
Gold spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: November 19, 2002
Location: North Dakota, United States
Posted: February 23, 2003 at 6:33 PM / IP Logged  
You might need to use the momentary to constant diagram and then the constant to momentary diagram if the button you wish to use as the trigger is only momentary.
J Rilla
Owner/Installer
geordie_racer 
Member - Posts: 9
Member spacespace
Joined: February 23, 2003
Location: United Kingdom
Posted: February 24, 2003 at 3:24 AM / IP Logged  
i want 2 use the solenoid 2 open the door from inside so i can get rid of the ugly interior handle

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