Old PSTN entry phone - door opening - #4

In this article I'm  describing the final version of hardware and firmware for the door opening.

Previous articles :

• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-1.html
• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-2.html
• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-3.html

Digital Encoder breakout

On many projects I use a digital encoder as input device (to set values, select, etc.).
In order to have more flexibility to put the encoder on panels, I usually manually wire it on a prototype board, every single time.

So it is time to have a standard way to deal with this.