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problem in Bob's Wigwag.pdf circuit?

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dave.gribble(at)mchsi.com
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Posted: Tue Jun 09, 2009 4:51 pm Post subject: problem in Bob's Wigwag.pdf circuit?

Hello - I am new to the list so please don't flame  me for posting this.  I am designing my landing lights around the circuit  on page 4 of Bob's Wigwg.pdf. 

  

 This is the circuit that uses the 4PDT switch,  marked "4TL1-10 or equal"  I just ordered my switch today.  My design  goal of this circuit is to have the switch function as OFF-WIGWAG-ON, with  OFF in the bottom position.

  

 In completing my design, I noticed in the Honeywell  datasheet for the 4TL1-10 switch (available at this link: http://www.datasheetarchive.com/4TL1-10-datasheet.html )  does not match the one in Bob's schematic.

  

 The problem is that for the -10 switch in the  datasheet, there are two poles (pins 8 & 11) that are open in the center  condition.  The switch in Bob's circuit requires all poles to be active in  all positions.

  

 After careful datasheet reading, I think that Bob's  design will work with a 4TL1-12 switch.  It is supposedly the same  circuitry as a -50 (which looks right) and has no momentary  positions.

  

 Can anyone confirm that I need to cancel my order  for the -10 and get a -12 instead?  I'm hoping to find out quickly to avoid  buying the wrong switch.

  

 I did search the archive and found a single poster  mentioning that the circuit didn't work... maybe this was why?

  

 Thanks for any info,

  

 dave

   [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Jun 10, 2009 5:18 am Post subject: problem in Bob's Wigwag.pdf circuit?

At 07:49 PM 6/9/2009, you wrote:

  	  Quote: 	
		   Hello - I am new to the list so please don't flame me for posting this.  I am designing my landing lights around the circuit on page 4 of Bob's Wigwg.pdf. 

  

 This is the circuit that uses the 4PDT switch, marked "4TL1-10 or equal"  I just ordered my switch today.  My design goal of this circuit is to have the switch function as OFF-WIGWAG-ON, with OFF in the bottom position.

  

 In completing my design, I noticed in the Honeywell datasheet for the 4TL1-10 switch (available at this link:  http://www.datasheetarchive.com/4TL1-10-datasheet.html ) does not match the one in Bob's schematic.

  

 The problem is that for the -10 switch in the datasheet, there are two poles (pins 8 & 11) that are open in the center condition.  The switch in Bob's circuit requires all poles to be active in all positions.

  

 After careful datasheet reading, I think that Bob's design will work with a 4TL1-12 switch.  It is supposedly the same circuitry as a -50 (which looks right) and has no momentary positions.

  

 Can anyone confirm that I need to cancel my order for the -10 and get a -12 instead?  I'm hoping to find out quickly to avoid buying the wrong switch.

  

 I did search the archive and found a single poster mentioning that the circuit didn't work... maybe this was why? 	




     I just checked the data package for wig-wag options

     I published at:



  http://www.aeroelectric.com/PPS/Lighting/WigWag.pdf



     The single control switch option on page 4 calls

     out the 4TL1-12 switch. Where did you see a recommendation

     for the 4TL1-10? I note that this drawing was updated

     in January of 07. I don't recall now but perhaps this

     change was to correct the part number.



 

        Bob . . .



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

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

         ---------------------------------------    [quote][b]

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dave.gribble(at)mchsi.com
Guest

Posted: Wed Jun 10, 2009 6:04 am Post subject: problem in Bob's Wigwag.pdf circuit?

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