I'd like to read a single digital output with two separate systems, each of which has a digital input. Both systems have a common ground.
In principle, since the digital output is low-impedance and since digital inputs are high-impedance, can I just tie these two inputs together at the same output without any contention or crosstalk, or must I add in some form of signal conditioning? Does this concept scale? Can I wire N digital inputs together to read a single digital output?
If not, what kind of buffering should I try to implement?
My use-case for this scenario is to wire a quadrature encoder output to both an off-the shelf PID controller and a separate system for logging ticks.
Cheers--and thanks for the..eh input.