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Old 10-20-2012, 09:42 AM   #5
geekmaster
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Posts: 6,433
Karma: 10773670
Join Date: Nov 2011
Location: Multiverse 6627A
Device: K1 to PW3
Quote:
Originally Posted by pepijndevos View Post
Yes, I found these threads you mention.

Like I said, they don't go into much detail about how to get off the back cover without ruining it. It would help to have a clear picture of where these pins are located.

IIRC geekmaster bent the wires back for photography. A warned dodo counts for two.
I ripped the pads of the circuit board on one K4 when bending the wires back for photography, as I recall. Now I have the wires securely taped down to the circuit boards in my kinldes after soldering, so they should even survive getting the serial wires yanked.

I used fine enamel-coated wire salvaged from a dead CFL (energy-saving compact fluorescent lamp). There are transistors and diodes in those electronic ballasts too, in addition to a nylon bobbin wrapped with wire.

EDIT: A little clarification: I used short lengths (about 2 inches/ 5 cm) of fine wire to attach to the PCB pads, so i could move bend the wires to move them out of the way, and I attached a longer serial cable to those shorter fine wires. I used a three-strand strip cut from an 80-pin UDMA IDE cable, which is small enough to route out the case next to the microUSB connector, and still plug in the USB cable. My K5 has its back cover on, but still I can connect to serial on that cable dangling from the bottom.

P.S. I have a series diode inside my K5 on the serial TxD line, so that shorting it does not harm it. That also allows me to safely pull it up to +3.3v or +5v TTL logic with a pullup resistor, because the kindle can still pull it to logic zero (0.7v across the diode, in this case).

Last edited by geekmaster; 10-20-2012 at 09:57 AM.
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