Hi guys,
first of all thanks for all the helpful info on this topic already on this forum. It has given me troubleshooting ideas that I would not have come up with otherwise. I have finished soldering my Ergodox, but upon trying it out I have found that my left hand doesn't work. By that I mean that if I just plug in the right hand of the keyboard, I am able to type any character on that side of the board, but as soon as I connect the TRRS connecter to join the two sides, the computer no longer recognizes the board as a usb device, and it therefore won't read keystrokes from either hand.
I would like to take existing advice on this topic from other posts and apply it to my situation, but my problem is I don't know how to execute many of the troubleshooting techniques that others have suggested on here. For instance, in this post (
https://geekhack.org/index.php?topic=55947.0) he says that he used a multimeter in order to verify the left hand is getting 5V. I have next to no experience with using a multimeter, and so I was unable to figure out how to measure that with the one I have.
The things I do feel confident about are
1. my IO Expander is on the correct direction (my friend who I was working with put his on backwards, and he had to reverse it to make his keyboard work)
2. my diodes are all working (giving a reading of ~.6 on the multimeter) and placed in the correct direction (I checked 1000 times)
3. my jump cables next to the TRRS connecter are on the right pair of holes.
I would appreciate any step by step instructions (like I'm a 4 year old) of how to measure anything related to the IO Expander or TRRS connectors using a multimeter (the only thing I have to measure with). I believe the problem lies with one of those two things, but I'm new to this so I could be completely wrong.
Thanks for any and all suggestions!
