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Garmin 296 hard wire

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wypaul

Joined: 08 Jun 2007
Posts: 24

Posted: Sun Sep 21, 2008 6:37 am Post subject: Garmin 296 hard wire

I purchased an automotive charging cable that I plan to use to hard wire my 296 to my plane.  When I opened the cigarette lighter end there was a small, square ceramic  in series with the positive lead.  What is the function of this component?  I use a small power jack in place of the cigarette lighter so I guess it is not really hard wired and would like to get rid of the extra bulk.  

Paul Spackman

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_________________
Paul Spackman
Q-2 Jabiru 3300

nuckolls.bob(at)cox.net
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Posted: Sun Sep 21, 2008 7:38 am Post subject: Garmin 296 hard wire

At 07:37 AM 9/21/2008 -0700, you wrote:

 	  Quote: 	
		  



I purchased an automotive charging cable that I plan to use to hard wire 

my 296 to my plane.  When I opened the cigarette lighter end there was a 

small, square ceramic  in series with the positive lead.  What is the 

function of this component?  I use a small power jack in place of the 

cigarette lighter so I guess it is not really hard wired and would like to 

get rid of the extra bulk.

Paul Spackman


	


   If it's a single, two-lead ceramic component, my best GUESS is

   a "Polyswitch".  It's a sort of self-resetting circuit breaker.

   Here's a extensive description of these critters:



http://en.wikipedia.org/wiki/Polyswitch



   For your purposes, an upstream fuse on the order of 2A or

   less would serve the same purpose. Having your accessory

   power jack fused at the bus is always a good thing.



        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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