temperature controlled remote start

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=114760
Printed Date: April 29, 2024 at 1:53 PM

Topic: temperature controlled remote start

Posted By: tasmith3
Subject: temperature controlled remote start
Date Posted: June 29, 2009 at 3:15 PM

I am installing a remote starter on my 2002 Ford Explorer. I transport canines inside my vehicle. I want to be able to add a high temperature switch that would send one negative pulse to my remote start to activate it if the ambient temperature in the rear of my Explorer reached an adjustable temperature (90 in summer, 40 in winter).

It must only sent one pulse. If multiple pulses are sent until the car cools, that would lead to will turn the system cycling on/off and overheating the dog. An bonus feature would be if the unit heat 95 and with no change, it would drop windows, activate fan, and sound horn.

I am not new to 12 volt electronics but wanted some different viewpoints on the best way to accomplish this task. My priority is the activation of the remote start to prevent overheating.

Replies:

Posted By: howie ll
Date Posted: June 29, 2009 at 5:39 PM

You could set older Clifford products to activate remote start on a lower temperature via the Wiz. Not sure how you'd do that now, I think Mr. Pearson and Mr. Idiot have to come in here. Try PMing those two and Dualsport.

Posted By: dualsport
Date Posted: June 29, 2009 at 7:56 PM

The switching could be done with a thermistor and comparator circuit to trigger on your selected setpoints, but would you want it to shut off at some point after it gets triggered? This would be a simplistic way to go, but somewhat limited

I think Kevin's PIC circuits might be a good application for this if you want to get sophisticated- He could read the temperature to a digital value with an A/D, and then perform any of the operations you want in a program. It'd be a lot more flexible in controlling all your devices instead of having analog comparators with fixed setpoints. It could shut down when the temperature goes into the desired range and only turn on when needed. Maybe he can evaluate what would be involved here-

Posted By: loneranger
Date Posted: June 29, 2009 at 8:13 PM

Why don't you just move the canines into a more conditioned environment, when your away?

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Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.
Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?
Moral - Never dismiss the obvious.

Posted By: tasmith3
Date Posted: June 29, 2009 at 9:40 PM

I located an out-of-production model of the DEI 556T Valet Digital Remote Start Controller and Timer on eBay for $29.99. I figured the solution would be more reliable, cheaper then putting my own together.

The manuals on this website were also helpful in determining if this is the product I needed.

https://www.the12volt.com/installbay/file.asp?ID=756
https://www.the12volt.com/installbay/file.asp?ID=755

Thanks for everyone's help.

Also, if someone had more money to spare, they could buy a more expensive solution like these:

https://www.rayallen.com/product/f_series_k-9_deployment_and_heat_alert_systems/K9-Transport

https://www.criminalisticsinc.com/products/hotdog/hotdogplus.htm

https://www.radiotronics.com/k9ha_pro/k9_heat_alarm_pro.html