Are there cheap SPST switches that have built in single wire comm. that can all be hooked up serially?
Or is there an efficient method to allow for expanding the number of switches easily?
I was thinking of a possible DAC like setup but this limits the number of switches and speed and may be error prone. 16 switches would require a 16-bit DAC.
What I'd like is a single 1 wire interface for routing all switching and controls through the unit and be "infinitely" expandable. Each switch would require a unique ID. It would be nice it were possible to have each control determine it's ID based on it's distance from the master. This is so no mapping has to be done.
The concept is to simply routing a large panel with many controls to simply a 1-wire interface which reduces wiring and pcb size significantly while allowing for expansion if required.
Is there anything out there that gets close to this? Essentially it boils down to finding cheap pots and switches that have the interface built into them