Jerry-

If you are going to go to a second prototype and your test is a
functional test then maybe you could run two "fingers", like an edge
connector, to the edge of the board (one on the top side and one on the
bottom side). When you want to short them, clip an aligator clip onto the
fingers.  This should provide the temporary short without adding any cost
to the board.

Hope that helps.

Charles Wills
[log in to unmask]



On Wed, 4 Dec 1996 10:25:37 -0600 [log in to unmask] (Jerry Cupples)
writes:
>Greetings, fellow Victor Johansen fans:
>
>We have a new board design which is reaching proto build.
>
>It seems that during the test procedure, it is necessary to short two 
>PTH
>locations momentarily to cause the board to power up in a certain 
>mode.
>
>The designer has brought these two circuit nodes to adjacent 0.040" 
>PTH
>locations at normal 0.100" centers, and labelled the "part" J1.
>
>We typically use a two pin header and a shunt for this sort of option 
>or
>"strapping".
>
>The board design is basically clean, having only a D-sub connector in
>through-hole packaging.
>
>I am resisting the population of this J1 connector, and asking our 
>test
>engineering people to come up with a more novel way of shorting the 
>two
>holes during test.
>
>They seem to think the only way to do it is our old standby header 
>pin, but
>personally I dislike having to hand stuff the things, and from a 
>design
>viewpoint, don't like them protruding up 0.300" off the top of the 
>board
>waiting to rip holes in every ESD bag.
>
>Was hoping someone could point me to some cute "clip" or "plug" which 
>could
>be easily and temporarily plugged into a PTH for only a few seconds. 
>It
>would need to make reliable contact without being held manually in 
>position
>(the test setup will have numerous boards under test in the fixture) 
>but
>should be easily removable by the operator. We would not, of course, 
>ship
>product with the plug, it should be re-useable here.
>
>If anyone has a short, sweet answer please reply to this posting and 
>ignore
>the one from Victor.
>
>
>regards,
>
>
>Jerry Cupples
>Interphase Corporation
>Dallas, TX USA
>http://www.iphase.com
>
>p.s. if this turns out to be original, I have it all documented in my
>notebook for patent sake.
>
>
>
>***************************************************************************
>* TechNet mail list is provided as a service by IPC using SmartList 
>v3.05 *
>***************************************************************************
>* To unsubscribe from this list at any time, send a message to:        
>   *
>* [log in to unmask] with <subject: unsubscribe> and no text.     
>   *
>***************************************************************************
>* If you are having a problem with the IPC TechNet forum please 
>contact   *
>* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]   
>   *
>***************************************************************************
>
>

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************