View Single Post
Old 12-25-2011, 09:04 PM   #8
geekmaster
Всё гениальное просто.
geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.geekmaster ought to be getting tired of karma fortunes by now.
 
geekmaster's Avatar
 
Posts: 5,066
Karma: 6789001
Join Date: Nov 2011
Location: Щедрость не имеет пределов.
Device: *.*
In retrospect, the "right" (but slow) way to go would have been to order the parts I need instead of just hacking something together with the parts I already had.

In particular, it would be a lot easier to just order a known-working 1.8v USB serial adapter instead of attaching resistors and diodes to a 3.3v USB adapter to shift the logic voltage levels. In addition to shifting logic levels, the USB adapter also had to be modified to allow the kindle TxD output to pull the adapter RxD input down to a logic zero (by removing an LED).

Also, it would be much more "professional" to use the right connector instead of soldering wires to the serial port pins inside the kindle.

But a quick hack often gets the job done much faster than waiting for the "right" parts to arrive (especially cheap parts from China).

The serial cable has now been unsoldered from my kindle touch, and the back cover is installed. Now I can hopefully leave the back cover on it for awhile.

Last edited by geekmaster; 12-25-2011 at 09:27 PM.
geekmaster is offline   Reply With Quote