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ArduinoMotionStairLights

PIR Motion activated RGB led stair lights for Arduino.

Goal of this project is to have animated RGB WS2812B stair lights. The lights are activated by 2 PIR Motion sensors located at the top and bottom of the stairs.

WS2812B addressable led string usually comes in a strip of 30 LEDs. I put 2 LEDs per stair which gave me 2-spare pairs in case an led pair needs to be replaced.

It currently requires FastLED 3.1 Arduino Library https://github.com/FastLED/FastLED/tree/FastLED3.1

This is now ready for Beta testing.

Components:

  • 5v 3A switching power supply.
  • ws2812b led strip
  • 2x pir sensors
  • 1000uF capacitor.

Wiring is pretty simple:

  • All devices share the same 5V power.
  • 3 data pins are used: for the two pir sensors and the ws2812b strip. You may want to choose different data pins - the defaults are marked at the top of the file.

Mounting:

  • PIR sensor glued into a blank wall face-plate with round hole drilled into it.
  • LED tube is:
    • a pipe cut in 1/2 and screwed to the wall.
    • led and wiring inside the 1/2 pipe.
    • Clear tubing is sanded to make it frosty & a slit is cut in it.
    • The clear-frosted tube is then sliped over top of the 1/2 pipe.

You can find examples of wiring online:

Video:

Mounting Conduit example - (NOTE: heat-shrink and electrical tape was used to stop shorting out - this is not in the photo)

led_conduit

  • Cost for controller and lighting:

    • $10 - 1 meter LED lights ws2812b 30 leds/m.
    • $7 - micro-controller - arduino uno.
    • $3 - 2x Passive infrared motion sensors.
    • $5.50 - 5v 3A switching power supply.
    • Free - repurposed 1000uf capacitor

  • Subtotal lighting: $25

  • Cost for mounting hardware:

    • $3 - metal electrical conduit tube - we cut it in half and screwed it to the wall.
    • $15 - Vinyl Tubing - cut a slit in it and sanded it down & slid it over top of the half-conduit.
    • $3 - 2x blank light switch cover - drilled a hole in it to mount the PIR sensors.
    • $7 - Access panel - so I could hide the micro-controller inside the wall.

  • Subtotal mounting: $28

TOTAL $53

Since this 1st micro-controller project I've been able to source the parts for even less than listed above.