Automatic Rainbow Staircase Lighting

I show you here how to create automatic and progressive lighting of stairs in the rainbow style!

No more getting up at night using the light on your cell phone to avoid switching on!

For this I used cable ducts where NeoPixel LEDs are installed. Detection is provided at the top and bottom by PIR presence detectors, installed in the 3D printed supports.

The "intelligent" part is entrusted to an Arduino Nano. A light sensor enables the system to be activated only if it is dark enough, and 2 potentiometers allow adjustments, one for light sensitivity, and the other for the duration of ignition (0 to 5 minutes)

Video:

Supplies

Material:

• 4 white solid wiring ducts 3x1 cm x 2 m (1.3 € x 4)
• 26 WS2812B addressable 5050 RGB NeoPixel LEDs (€ 14.23 for 100)
• 220V - 5V 3A power supply (€ 13.28)
• Arduino Nano
• 2 PIR sensors HC-SR501 (€ 9.59 for 5)
• Photoresistor LDR
• 2 Potentiometers 10 Kohms
• 2 Resistors 470 ohms
• 1 Restistor 10 Kohms
• Capacitor 1000 µF

Step 1: Solid Wiring Ducts

To support the LEDs and hide the wires at the same time I used plastic solid wiring ducts (Not sure about the English translation).

I drilled them with a 4mm drill bit according to the center distance of the stairs (It depends on your staircase).

Step 2: NeoPixel LEDs

For the leds, I chose WS2812B. These are addressable RGB LEDs that I bought in a set of 100.

I glued them with a hot glue gun, and to be well centered in relation to the hole, I installed the support above a mirror.

Be careful with the direction, these LEDs have an input and an output, so I turned them in the logical direction so as not to have to cross the wires.

Step 3: Wiring

The wiring is not difficult, there is a + and a - in common for all the LEDs (orange and blue).

Then there is an IN and an OUT pin. The OUT pin of one LED must be connected to the IN pin of the next.

Thin wire is sufficient, here I used wire from an old unused telephone cable.

Step 4: Programming

The heart of the system is an Arduino Nano.

I started by experimenting with Tinkercad Circuits and then I used a test board.

For the LEDs, I used the library Adafruit_NeoPixel.h

I added 2 potentiometers which allow the following settings:

1. Light sensitivity (compared to the photocell)
2. The ignition time (0 to 5 minutes)

Presence are detected by PIR detectors HC-SR501.

The electronic diagram and the Arduino code are available for download.

Step 5: Electric Circuit

Considering the low number of components, I used a pre-drilled test plate but you can make a real PCB.

Step 6: 3D Printing Support

I created the supports for the PIR sensors with Fusion 360 and I 3D printed them with imitation wood PLA.

The STL file is also to download.

Step 7: Installation 1

The base of the wiring ducts is screwed inside the stringers of the stairs.

The top of the wiring ducts which contains the leds and the wires is clipped on the base.

The sensor supports are screwed onto the second and last step.The wires of the bottom detector also pass through the wiring ducts.

Step 8: Installation 2

The power supply and the circuit are installed at the top of the stairs.

The light sensor (photocell) is installed under the last step, and a cover hides the electronics.

Step 9: It's Glow Up!

Operation: if you arrive from the bottom, the LEDs light up one by one up to the top, then go out in the same direction (go out from bottom to top).

If you come from the top, it's the other way around of course.

If you liked it, please vote for me on the MAKE IT GLOW contest 😉

Comments

[lamaleon]

Bonjour,
j'ai fait votre circuit pour mon escalier, comment fait-on pour accélérer l'allumage des leds, merci d'avance pour la réponse

[MagicManu]

Bonjour,
il faut diminuer la valeur des delay().
delay(5); et delay(15); pour le temps de variation d'une LED.
delay(200); et delay(500); c'est le temps entre 2 LED.

Donc essayer de diminuer ces valeurs et les LED s'allumerons plus vite.

[lamaleon]

Bonjour, merci pour l'info ca fonctionne

[critic2]

Congratulations on your grand prize win.
I love this project and tried it. I’m new to arduino and still learning the code.
Is there a way to comment out the LDR section and not install this component?
I would like to work in all lighting conditions.
Again, congratulations! Well done!

[MagicManu]

Thank you for the compliments!
Here is a version of the code without the photovoltaic sensor and without the brightness adjustment :
https://www.magicmanu.com/stairs2/

[Rose Li]

Very good project, but can I talk about it in detail in the Arduino programming section? I don't quite understand, thank you

[MagicManu]

Thank you ! Yes I admit that I have not detailed the programming part, what information do you need?

[corto45]

Here is an adaptation of the beautiful project of MagicManu for solid stairs (witht risers) and quarter-turn. In my case, I chose to put LEDs on one side.
I glued white solid wiring ducts with 10x20mm so flexible enough to be able to follow the curve of the stairs.
In order not to be dazzled by direct light, I stuck mini visors on each led. These visors are cut from 20mm PVC tube (IRL) for electrical installation.
1 single, very discreet 6mm diameter hole in a riser, for the passage of the wires and the fixing of the photocell.

[MagicManu]

Good job ! Well done !
And these cut tubes are a very good idea, they look good!
Thanks for sharing!

[joseph.mendoza101]

Now that is cool

[scrubbie2016]

There is some confusion about what has been used for the light detection.
Defintions:
As nouns the difference between photodiode and photoresistor is that photodiode is a semiconductor two-terminal component whose electrical characteristics are light-sensitive while photoresistor is an electronic component whose resistance is inversely proportional to the intensity of incident light; a photoconductor.

so, what did you use? A photoresistor (which is in fact a LDR) or a photodiode?

If it is a photo diode the the schema would be different. Can You please clarify, since this is crucial to the functioning of the circuit.....

[MagicManu]

Sorry, it's a A photoresistor (LDR), translation problem!

[PushPlinen]

So eye-catching. Simply the stairs glaring with inexpressible sparkle. Awesome job.

[MagicManu]

Thanks ;)

[75capoeira]

I’m lost or I don’t know but LDR? And 10k resistor showing in the schematic doesn’t shows in the beginning of the list? And when I’m trying to figure out by pictures you don’t use the LDR? Can you explain to me please :) fantastic project btw

[MagicManu]

Sorry, I added the resistor R4 to the list at the beginning (10 kohms). And the LDR (LDR=photoresistor) is wired with 2 wires on the LDR1 and LDR2 terminals (black and blue wires). Thanks.

[75capoeira]

im trying to download the stl file but shows error all the time

[sugarnspice10172]

Love it. Just voted for you. I wish I had your skills. Amazing. My dream staircase.

[MagicManu]

it's very nice thank you!

[Swiss_IoT_DIY]

Great project, I love it!
I hope to get it done on my rounded stairs. Not so easy, I need some kind of flexible Material to hide the wires behind it.