Hello AAC forum,
Started this project using PIR sensors to trigger a 555 timer that turns on LEDs for twenty seconds for a walker on a staircase.
![staircase_design_200528_600_x_400.gif]()
But then the concept of directionality popped up and it was decided that the system
should operate a head of the walker. So the LEDs come on below the walker
if she is going down and above the walker if she is going up. So the simple
555 approach would not allow that complexity.
So the Arduino was programmed to...
Staircase LEDs using Arduino
Started this project using PIR sensors to trigger a 555 timer that turns on LEDs for twenty seconds for a walker on a staircase.

But then the concept of directionality popped up and it was decided that the system
should operate a head of the walker. So the LEDs come on below the walker
if she is going down and above the walker if she is going up. So the simple
555 approach would not allow that complexity.
So the Arduino was programmed to...
Staircase LEDs using Arduino