LEDDER - Motion Triggered Stair Lighting

This was a personal project of mine to make motion triggered stair lights. It uses custom designed PCBs and 3D models, so I wouldn't call it beginner friendly. Feel free to use any of this for your own project.

Main points of this project

• Very warm, 2000K LEDs (C5440671) were chosen for cozy feel and to not be harsh on the eyes at night
• Slow fade-in fade-out, dimming is also gamma corrected so it's nicely linear
• Two sensors so it can be triggered when approaching any side of the stairs.
• Motion sensors combined with photoresistors for triggering only when it's dark
• Fuse not only on the control board but also on every step light, each sensor. Safety first.

Requirements (apart from PCBs, PCB compontents and 3D printing)

• Power supply used is 12V MeanWell LRS-75-12 (the case has screw positions for it)
• 12x M3x5 hot-melt inserts
• 6x M2x5 hot-melt inserts
• 2x M20x1.5 cable gland

Some notes

• Each light PCB is designed to be broken apart into two half-circle boards
• Two variants of light PCB are added (for 3806 LEDs and for 4008 LEDs), choose 3806 version for the recommended amber LEDs.
• See images to get better idea of how this looks and works