Thanks for reading..
I am trying to make my own FTDI cable/programmer so I can upload sketches to my breadboard Arduino projects (without using my true Arduino board, swapping chips..etc)
So I order a CA-42 cable form China.. installed drivers, got my com port number..etc
cut my cable in half..and started to continuity trace my pinouts
PHONE END: (cable color, wire# underneath)
bl wh gr or
8-----7-----6-----5-----4-----3-----2----1
according to all the tuts for the 'pins outs:
https://web.archive.org/web/20210308144706/https://www.uchobby.com/index.php/2009/10/04/diy-usb-to-serial-cable-for-3/
and the Nokia pinout chart:
5 USB Vbus Also act as USB power detection? Should be connected to USB pin 1 in usb data cable. (USB Vcc +5V)
6 FBus Rx/USB D+ USB exists only in some models*. Should be connected to USB pin 3 in usb data cable. (USB DATA+)
7 FBus Tx/USB D- USB exists only in some models*. Should be connected to USB pin 2 in usb data cable. (USB DATA-)
8 GND Data GND (USB GND)
so to re-cap
GND TX RX ?? (USB Vbus) ??
| | | |
bl wh gr or
| | | |
8---------7---------6---------5---------4---------3---------2--------1
I have no clue what the Orange wire/USB Vbus line is for.. (not used? possibly clipped and moved/re-soldered for a further reset or power line to Arduino chip?)
anyways..
I switch my meter to check voltage..
clip black to GND and red to:
Orange wire: (USB Vbus)
nothing
Green wire: (RX)
3.18v
White wire: (TX)
nothing
Black wire: (GND)
Should I be concerned that my TX line isnt giving out 3.3v line in the tuts? And why isnt it?
Also anyone explain to me about the USB Vbus wire?
I did tie both the the RX & TX lines.... open Hyper terminal and infact get text on the screen.. however it wasnt being duplicated (although I dont believe I had on echo default)
can I try to 'upload' a sketch to my chip as is?
should I cut out USB plastic housing end and solder on both a reset wire and 3.3v wire?
Alternately.. I also have a DKU-5 cable to work with if this FAILS.
thanks for any help.