Thread: K3 lv Serial Cable
View Single Post
Old 10-19-2012, 04:32 PM   #30
knc1
Embedded Cheerleader
knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.
 
knc1's Avatar
 
Posts: 6,195
Karma: 5830426
Join Date: Feb 2012
Device: Too many.
Contact Knees

And we find that the total depth of each grass hopper knee is 0.140 inch. With the contact point centered in the raised portion.

The contact point (center of knee) for the front pair is 0.170 inch in from the connector edge and for the rear pair is 0.310 inch in from the connector edge.

The knees are 0.030 inch high (in the 0.040 inch high slot).

Since the "inside, front" (shown right of center in the sketch) is GND, we will also want to stagger the engagement points on the tab so that GND gets connected before the CMOS Tx and Rx contacts.

The "outside, front" (shown at the right side of the sketch) is the light control sense lead, we will not be bringing that out on our connector tab.

For reference:
http://www.mobileread.com/forums/sho...3&postcount=23
And keep in mind that the sketch is of the "cover" part of the connector, shown "upside down" (board side up).
(Which will be its orientation when using the Kindle - since the Kindle is upside down for the photographs.)
Attached Thumbnails
Click image for larger version

Name:	knees.png
Views:	64
Size:	2.2 KB
ID:	94485  

Last edited by knc1; 10-20-2012 at 12:22 PM.
knc1 is offline   Reply With Quote