DIY - Digital LED Stair Lighting - Arduino APA102 LED

#staircaselighting #staircase #led

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Stair lighting proof of concept

In this project I have built a LED stair lighting. The stair has 3 stair parts. For every stair are two sensors. The sensors detect when someone go up or downstairs and switch the light on or off. I used digital LEDs so you can switch every single LED seperate and you are able to make cool on and off move effects.

The LED stripe run on 5V. That's a bit difficult, but it works when you plan a good power grid.

Features
- Digital LEDs
- Automatic switch on and off when you go up or downstairs
- Position light for the first and last step when it is dark
- Optional wifi controll for ambientelight
- Timer off when light is on and no sensor for off is detected

Electronic Parts
- APA102 warm white digital LEDs 144/m
- Power supply 5V/50A
- Power supply 5V/35A
- Teensy 3.2 Microsontroller to control the LEDs
- Arduino Nano on each sensor for more flexibility and better
communication over the long cables
- Ultrasonic HC-SR04 or PIR sensor on stairs top and bottom
- Thick cable for the 5v power line
- Analog Brightness sensor

3D printed Parts
- Ultrasonic or Pir case

Hardware parts
- Aluminium LED profiles
- I used drywall to mount the profiles

Notes
- The PIR Sensor works better than the Ultrasonic HC-SR04
The Ultrasonic are more unstable and not so fast in my case
- The system works good but I think about some updates
*Design a PCB for the Teensy
*RS 485 communication between sensor and Teensy. I think it is
better against electrical interference.
*Software optimizations

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