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Power Control for Heated Seats

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jluckey(at)pacbell.net
Guest

Posted: Sun Aug 20, 2023 12:22 pm Post subject: Power Control for Heated Seats

Listers,

I want to have some control over the temperature of heated seats in an RV-14.

I am considering 2 types of circuit:

1. a high-power linear regulator like a LM138

or

2. a low frequency (maybe 50 Hz) PWM circuit (maybe a 555) driving an FET;  



I don't think any kind of thermostatic control is practical or necessary (but I'm open to suggestions).

The heater(s) consist of 2 pads, one for the seat and one for the lower back.  In total they draw 6 amps at 12v.





TIA,

Jeff Luckey

KCMA

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Ceengland

Joined: 11 Oct 2020
Posts: 381
Location: MS

Posted: Sun Aug 20, 2023 12:44 pm Post subject: Power Control for Heated Seats

On 8/20/2023 3:22 PM, Jeff Luckey       wrote:

     

      	  Quote: 	
		                         Listers,

         

         

         I want to have some control           over the temperature of heated seats in an RV-14.

         

         

         I am considering 2 types of           circuit:

         1. a high-power linear           regulator like a LM138

         or

         2. a low frequency (maybe 50           Hz) PWM circuit (maybe a 555) driving an FET;Â  

         

         

         

         I don't think any kind of           thermostatic control is practical or necessary (but I'm open           to suggestions).

         

         

         The heater(s) consist of 2           pads, one for the seat and one for the lower back.Â  In total           they draw 6 amps at 12v.

         

         

         

         

         TIA,

         

         

         Jeff Luckey

         KCMA

         

       

     	
     The ones (ama-bay specials) I bought for my RV6 came with variable     controls for each seat.

     

     FWIW,

     Charlie

   Virus-free.www.avast.com[url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]

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_________________
Charlie

nuckolls.bob(at)aeroelect
Guest

Posted: Sun Aug 20, 2023 5:08 pm Post subject: Power Control for Heated Seats

At 03:22 PM 8/20/2023, you wrote:

  	  Quote: 	
		  Listers,



 I want to have some control over the temperature of heated seats in an RV-14.



 I am considering 2 types of circuit:

 1. a high-power linear regulator like a LM138

 or

 2. a low frequency (maybe 50 Hz) PWM circuit (maybe a 555) driving an FET;  



 I don't think any kind of thermostatic control is practical or necessary (but I'm open to suggestions).



 The heater(s) consist of 2 pads, one for the seat and one for the lower back.  In total they draw 6 amps at 12v.



 	


   I've used these for fan motor control on

   vehicles. The price is right and they're

   pretty compact.



  https://tinyurl.com/4caahvz4



 

   



 

 

   Bob . . .



                    //// 

                   (o o) 

    ===========o00o=(_)=o00o========= 

    < Go ahead, make my day . . .   > 

    < show me where I'm wrong.      > 

    =================================

  

    In the interest of creative evolution

    of the-best-we-know-how-to-do based

    on physics and good practice.

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jluckey(at)pacbell.net
Guest

Posted: Sun Aug 20, 2023 10:11 pm Post subject: Power Control for Heated Seats

Bob,

Does the knob "click off"?Â  It says something like that somewhere on the web page it's not exactly clear.

And you're right, at that price it would be hard to go wrong.... I've got a couple of things around here that I would like to control the speed... and a nichrome wire cutter, and a ...Â  



Thx



    On Sunday, August 20, 2023 at 06:20:18 PM PDT, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:  

 

 At 03:22 PM 8/20/2023, you wrote:



Listers,



I want to have some control over the temperature of heated seats in anRV-14

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Aug 23, 2023 8:19 am Post subject: Power Control for Heated Seats

At 01:10 AM 8/21/2023, you wrote:

  	  Quote: 	
		  Bob,



 Does the knob "click off"?  It says something like that somewhere on the web page it's not exactly clear. 	




   Yes, they have an on/off switch at max CCW rotation



 

   Bob . . .



                    //// 

                   (o o) 

    ===========o00o=(_)=o00o========= 

    < Go ahead, make my day . . .   > 

    < show me where I'm wrong.      > 

    =================================

  

    In the interest of creative evolution

    of the-best-we-know-how-to-do based

    on physics and good practice.

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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jluckey(at)pacbell.net
Guest

Posted: Wed Aug 23, 2023 10:18 am Post subject: Power Control for Heated Seats

Thanks Bob.  I just ordered one to test.





-Jeff



                  

                                                                    On Wednesday, August 23, 2023 at 09:31:42 AM PDT, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:                 

                 



                 



                   At 01:10 AM 8/21/2023, you wrote:

  	  Quote: 	
		  Bob,



 Does the knob "click off"?  It says something like that somewhere on the web page it's not exactly clear. 	




   Yes, they have an on/off switch at max CCW rotation



 

    Bob . . .



                    //// 

                   (o o) 

    ===========o00o=(_)=o00o========= 

    < Go ahead, make my day . . .   > 

    < show me where I'm wrong.      > 

    =================================

  

    In the interest of creative evolution

    of the-best-we-know-how-to-do based

    on physics and good practice.

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