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jluckey(at)pacbell.net Guest
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Posted: Sun Aug 20, 2023 12:22 pm Post subject: Power Control for Heated Seats |
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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: 389 Location: MS
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Posted: Sun Aug 20, 2023 12:44 pm Post subject: Power Control for Heated Seats |
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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. 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 |
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nuckolls.bob(at)aeroelect Guest
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Posted: Sun Aug 20, 2023 5:08 pm Post subject: Power Control for Heated Seats |
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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.
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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
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Posted: Sun Aug 20, 2023 10:11 pm Post subject: Power Control for Heated Seats |
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Bob,
Does the knob "click off"? 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
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Posted: Wed Aug 23, 2023 8:19 am Post subject: Power Control for Heated Seats |
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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.
| - The Matronics AeroElectric-List Email Forum - | | 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
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Posted: Wed Aug 23, 2023 10:18 am Post subject: Power Control for Heated Seats |
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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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