Quote:
Originally Posted by geekmaster
I also had to remove an LED on my 3.3v USB serial adapter that was supplying too much current for the kindle to sink to a logic zero. I replace the LED with the 22K resistor shown in the circuit at the post linked above. That allows me to use a 3.3v adapter just fine on my K4 and K5. I actually soldered the resistor and diode inside one of my kindles, so that kindle now supports 1.8v to 5v TTL serial.
|
The Tx and Rx leds of this adapter board are driven by dedicated output pins of the FT232, not by a "parasitic" connection to the signal leads.
The chip on this board is the same one inside of the cable that I recommend.