control a motor w/ timed relay

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=77708
Printed Date: July 18, 2025 at 8:47 AM

Topic: control a motor w/ timed relay

Posted By: cyruslam
Subject: control a motor w/ timed relay
Date Posted: May 13, 2006 at 3:02 AM

hi,

I've got a 12V motor connect to a DPDT Switch Centre Off Spring Return Both Sides as shown on below.

So, when i press and hold the upper button, it will turn clockwise. press the lower side button, motor will turn anti-clockwise

Now, i want to use trunk release function on my car alarm to control that motor(a red w/balck stripe cable on my alarm which is for trunk release).

i want to do is when i press the trunk release button(without holding it) on the alarm remote, the motor start to turn clockwise (or anti clockwise, doesnt matter) for about 8-9 seconds(cant be more then 9.5 seconds) and then stop.

any chance to do it with a relay? how can i connect it to the setup in the picture above? any other thing (eg capacitor, resistor etc) i need to connect between them in case to make that work??

Thank you very much for help~~~

Replies:

Posted By: cyruslam
Date Posted: May 17, 2006 at 4:50 AM

no one can help?

Posted By: killer sonata
Date Posted: May 17, 2006 at 4:54 AM

Hmmm, Im not really sure. But I think the word you are looking for is counter clockwise. Sounds to me like you would need to use 2 different outputs from your alarm to be able to have the motor spin both ways (a channel for each direction). As far as the timing, I think it would involve more than just relays since relays dont have a timing ability.

Posted By: bigscratch
Date Posted: May 26, 2006 at 8:30 AM

You need something like the TR-7 from www.pac-audio.com.
This has the abillity to do what you describe using only one channel from your alarm.