As you may well know, Arduino’s analog inputs can be used to measure DC voltage between 0 and 5V ... The voltage divider decreases the voltage being measured to within the range of the Arduino analog ...

The board layout and the source code is all available on GitHub. Because the switches are analog, they are bidirectional. That is, it isn’t really connecting one output to 32 inputs.

There was a time when building electronics and building software were two distinct activities. These days, almost any significant electronic project will use a CPU somewhere, or — at least &#… ...