View Single Post
Old 12-26-2018, 05:05 PM   #28
dom123dom
Zealot
dom123dom began at the beginning.
 
Posts: 106
Karma: 10
Join Date: Dec 2018
Location: Sydney, Australia
Device: Kindle Paperwhite 2 WiFi 4Gb 2013 (s/n 9017..)
I'm learning more as i experiment, so I will update here when I overcome things...I found my multimeter, plugged the USB to serial board into my computer and notice voltages as follows on the pins:

RX = 2.9v
TX = 3.3v

I'm not sure why these are different, I was expecting 3.3v on both pins.

If I set the jumper to 5v there is a similar slightly lower voltage on the RX pin. I'm expecting the voltages to drop on all pins once I have the LDO in place.

I have decided not to order the cable for now since I have almost all the parts, but I will probably still use the sewing pin technique to connect to the kindle.
dom123dom is offline   Reply With Quote