Pensive
Well-known member
Hi all
I'm looking to use some carefully chosen resistors to pickup multiple individual switches from one analogue input.
I need to detect the individual state of each switch with each poll, using different resistors on each switch such that the combinations of switch presses always result in a unique analogue response.
Is there a tried and tested accepted limit to this capability through a teensy input? 4 buttons, 8 buttons?
Does it change from teensy to teensy ( I have a 3.1)?
And is it reliable ? How much better is a multiplexer chip? Except for saving the CPU cycles (always a benefit).
Cheers guys
First Arduino project
Jon
I'm looking to use some carefully chosen resistors to pickup multiple individual switches from one analogue input.
I need to detect the individual state of each switch with each poll, using different resistors on each switch such that the combinations of switch presses always result in a unique analogue response.
Is there a tried and tested accepted limit to this capability through a teensy input? 4 buttons, 8 buttons?
Does it change from teensy to teensy ( I have a 3.1)?
And is it reliable ? How much better is a multiplexer chip? Except for saving the CPU cycles (always a benefit).
Cheers guys
First Arduino project
Jon