I'm building a 'busy box' for a toddler that will have several SPST switches on it. What I would like to do is wire those switches such that:
- I only use 1 pin on the Arduino, and
- The Arduino will recognise when any switch has been thrown, whether on-to-off or off-to-on, and irrespective of the status of the other switches.
The idea is that toggling any switch will trigger an activity such as lights flashing, music playing, etc.
I'm not sure if it's even possible, but there are a lot more creative minds out there than mine and so I thought I'd toss this out there.