I need help tracing the Viper columns

[tjweir]

I'm adding Viper support to TMK[1] and my lack of experience is making it hard to map the columns.

Given the notched bottom of the PCB, I not sure of the columns of the bottom row.
There are 6 switch positions, and I think it starts on Column B, but I'm not sure I'm tracing the paths correctly.

Am I explaining this correctly?  Can anyone help?

Column A - Left side when looking at the keys


Column N - Right side when looking at the keys


Whole PCB


[1] -https://github.com/tjweir/tmk_keyboard

[slickmamba]

No idea how to help you, but I am super intrigued! 

[tjweir]

No idea how to help you, but I am super intrigued! 

My brute force attempts fell short, so I need some help from those who know better.

[phoenix1234]

Maybe someone already did can help you. But if you want to do it on your own, I think the best way to trace is to have a digital multimeter, it will help to trace where electrical connections have been connected. Otherwise, you can ask the Viper owner to provide the schematic of the PCB.

[tjweir]

Ok, I grabbed my multimeter and traced the columns. 

Time to get tmk working.