Published April 9, 2024 © GPL3+

Shelf lighting

Upgrade the IKEA KALLAX or other shelf with mood lighting. You can integrate shelf lighting into your smart home system.

IntermediateShowcase (no instructions)20 hours268

Things used in this project

Hardware components

Espressif ESP32 Development Board - Developer Edition

Adafruit Flora RGB Neopixel LEDs- Pack of 4

Alarm cable 4 core

Anycubic i3 Mega 3D printer

Any 3D printer

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Soldering Station, Hobbyist

Solder Wire, Lead Free

Drill / Driver, Cordless

Tape, Double Sided

Story

Short summary

Design

First, I formulated the goal of what I want to achieve with this project. Since this is a hobby project, my primary goal was to have fun, try new technologies, and end up with a nice product that works well.

I've used NeoPixels before, and because they're easy to handle and look great, they're ideal components for this project as well.

Design the PCB mounts in OpenSCAD

1 / 5 • OpenSCAD designs

Unfortunately, I needed several iterations to finalize the 3D designs. After correcting several minor errors, the final 3D model was produced, which I attach in the project description.

1 / 2 • I put a Neopixel in the mount as a test

I printed 18 mounts. This is 2 more than I would have needed, but I thought it would be good as a spare part.

The mounts are on the left and the covers on the right

I also took snapshots of the placement of the mounts.

1 / 7

After installing the NeoPixel brackets, I soldered the wires. Where necessary, I drilled through the shelf to route the wire through. After I finished each shelf, I assembled the shelf and programmed the ESP-32, using the Arduino IDE.

Check out my other projects and write what you think about the project in the comment section.

Schematics

Code

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif
#define PIN        2
#define NUMPIXELS 16

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);


uint8_t rVal=254, gVal=1, bVal=127;
int rDir=-1, gDir=1, bDir=-1;

float easeInOutQuad(const float& x) {
  return x < 0.5f ? 2.0f * x * x : 1.0f - pow(-2.0f * x + 2.0f, 2) / 2.0f;
}

void setup() {
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif

  pixels.begin();
  pixels.clear();
  for(float j = 0; j < 1; j += 0.01){
    float m = easeInOutQuad(j);
    for(int i=0; i<NUMPIXELS; i++) {
      pixels.setPixelColor(i, pixels.Color((uint8_t)(rVal * m),(uint8_t)(gVal * m),(uint8_t)(bVal * m)));
    }
    pixels.show();
    delay(10);
  }
}

void loop() {
  rVal = rVal + rDir;
  gVal = gVal + gDir;
  bVal = bVal + bDir;
  if (rVal >= 255 || rVal <= 0) rDir *= -1;
  if (gVal >= 255 || gVal <= 0) gDir *= -1;
  if (bVal >= 255 || bVal <= 0) bDir *= -1;
  for(int i=0; i<NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(rVal,gVal,bVal));
  }
  pixels.show();
  delay(20);
}

// Constants
//units are in mm
$fn = 128;

neopixel_radius = 4.95;
led_radius = 2.0;
material_thickness = 1;
cable_holder_height = 5.5;
cable_holder_depth = 30;
cable_radius = 2;
pcb_height = 2.00;

cover_dist = 12.0;
show_neopixel = false;
show_cable = false;
show_holder = true;
show_cover = true;

cable_holder_width = (neopixel_radius * 2) + (2 * material_thickness);

if(show_neopixel){
    translate([0,0, (cable_holder_height/2) - 2.05])
    neopixel(r=neopixel_radius, w= 2);
}

if(show_cable){
    translate([0,-neopixel_radius - 1,0.2])
    cable(r=cable_radius, l=40);
    
    rotate([0,0,180])
    translate([0,-neopixel_radius - 1,0.2])
    cable(r=cable_radius, l=40);
}


group(){
    if(show_holder){
        cable_holder(
            w = cable_holder_width, 
            h = cable_holder_height, 
            d = cable_holder_depth, 
            t = material_thickness,
            r = neopixel_radius,
            cable_r = cable_radius,
            pcb_h = pcb_height
        );
    }

    if(show_cover){
        translate([0, 0, (cable_holder_height/2) + cover_dist])
        cable_holder_cover(
            w = cable_holder_width, 
            h = cable_holder_height, 
            d = cable_holder_depth, 
            t = material_thickness,
            r1 = neopixel_radius,
            r2 = led_radius,
            cable_r = cable_radius
        );
    }
}

module cable_holder_cover(w, h, d, t, r1, r2, cable_r){
    gap = 0.1;
    dimming = 0.25;
    difference(){
        group(){
            // pöcök 1
            rotate([0, 180, 90])
            translate([
                -(d - (2*t))/2,
                (-w/2) + t,
                t + gap+dimming
            ])
            prism(l = (d - (2*t)), w = t/2, h = t/2);
            
            translate([
                (w/2)- (2.5*t),
                -d/2 + t,
               - t - (t/2) -dimming - gap
            ])
            cube([(t), (d - (2*t)), 2*t + gap], false);
            
            
            //rotate([0, 0, 180])
            translate([
                (w/2)- (2*t) + t/2,
                -d/2 + t,
                -t - gap - dimming
            ])
            cube([t/2, (d - (2*t)), dimming ], false);
            
            // pöcök 2
            rotate([0,0, 180])
            group(){
                rotate([0, 180, 90])
                translate([
                    -(d - (2*t))/2,
                    (-w/2) + t,
                    t + gap+dimming
                ])
                prism(l = (d - (2*t)), w = t/2, h = t/2);
                
                translate([
                    (w/2)- (2.5*t),
                    -d/2 + t,
                   - t - (t/2) -dimming - gap
                ])
                cube([(t), (d - (2*t)), 2*t + gap], false);
                
                
                //rotate([0, 0, 180])
                translate([
                    (w/2)- (2*t) + t/2,
                    -d/2 + t,
                    -t - gap - dimming
                ])
                cube([t/2, (d - (2*t)), dimming ], false);
            }
              
            translate([0, 0, t/2])
            cube([w, d, t],true);
        }
        //led hole
        cylinder(h = h/2, r1=r2/2, r2 = r2*2, center = true);
        extra = 1;
        translate([
            -(r1+0.1),
            -(r1+extra), 
            -h/2
        ])
        
        cube([((r1+extra) * 2), ((r1+extra) * 2), h/2], center = false);
                
    }
    //cable upper holder
    cable_holder_gap = -0.03;
    //Here
    rotate([90,0,0])
    translate([0,  -cable_r-0.53, (d/2)-(t/2)])
    
    difference(){
        group(){
            cylinder(h = t, r = cable_r+t, center = true);
            
            translate([0,2*(t+0.1),0])
            cube([2*cable_r+t,t,t], center = true);
        }
        cylinder(h = (2 * t)+2, r = cable_r, center = true);
        translate([0, -cable_r - (t), 0])
        cube([2*(cable_r+t),2*(cable_r+t),(2 * t)+2], center = true);
        
        translate([-cable_r - (t/2)+cable_holder_gap,  cable_r, 0])
        cube([t, 2*cable_r,(2 * t)+2], center = true);
        
        rotate([0,180,0])
        translate([-cable_r - (t/2)+cable_holder_gap,  cable_r, 0])
        cube([t, 2*cable_r,(2 * t)+2], center = true);
        
        cube([2 * cable_r + 2, 2*t,(2 * t)+2], center = true);  
    }
    
    
    
    
    rotate([90,0,180])
    translate([0,  -cable_r-0.53, (d/2)-(t/2)])
    difference(){
        group(){
            cylinder(h = t, r = cable_r+t, center = true);
            translate([0,2*(t+0.1),0])
            cube([2*cable_r+t,t,t], center = true);
        }
        cylinder(h = (2 * t)+2, r = cable_r, center = true);
        translate([0, -cable_r - (t), 0])
        cube([2*(cable_r+t),2*(cable_r+t),(2 * t)+2], center = true);
        
        translate([-cable_r - (t/2)+cable_holder_gap,  cable_r, 0])
        cube([t, 2*cable_r,(2 * t)+2], center = true);
        rotate([0,180,0])
        translate([-cable_r - (t/2)+cable_holder_gap,  cable_r, 0])
        cube([t, 2*cable_r,(2 * t)+2], center = true);
        
        cube([2 * cable_r + 2, 2*t,(2 * t)+2], center = true);  
    }
    
}

module cable_holder(w, h, d, t, r, cable_r, pcb_h){
    difference(){
        group(){
            difference(){
                cube([w, d, h], true);
                
                translate([0, 0, t])
                cube([w - (2 * t), d + (2* t), h], true);
            }
            //perem 1
            translate([
                (w/2) - t, 
                0, 
                (h/2) - (t/2)
            ])
            cube([t/2, d, t], true);
            //perem 2
            rotate([0, 00, 180])
            translate([
                (w/2) - t, 
                0, 
                (h/2) - (t/2)
            ])
            cube([t/2, d, t], true);
        }
        translate([0,0,t])
        cylinder(h = h, r = r, center = true);
    }
    
    
    difference(){
        group(){
            cylinder(h = h, r = r + t, center = true);
            
            translate([(w/2) - (3*t), -(r+2*t)/2 - 2, -h/2])
            cube([2*t,2*t,h], center = false);
            
            rotate([180,0,0])
            translate([(w/2) - (3*t), -(r+2*t)/2 - 2, -h/2])
            cube([2*t,2*t,h], center = false);
            
            rotate([180,180,0])
            translate([(w/2) - (3*t), -(r+2*t)/2 - 2, -h/2])
            cube([2*t,2*t,h], center = false);
            
            rotate([0,180,0])
            translate([(w/2) - (3*t), -(r+2*t)/2 - 2, -h/2])
            cube([2*t,2*t,h], center = false);
        }
        cylinder(h = h+1, r = r, center = true);
        cube([w/1.8, d, h+1], true);
    }
    // oldal fal 1
    difference(){
        translate([0,(d-t)/2,0])
        cube([w, t, h], center = true);
        rotate([90, 0, 0])
        translate([0, cable_r/9, -(d/2) + (t/2)])
        cylinder(h = (2 * t), r = cable_r, center = true);
        
        rotate([90, 0, 0])
        translate([0, cable_r+cable_r/9, -(d/2) + (t/2)])
        cube([(2*cable_r)+0.1,2*cable_r,cable_r], center = true);
    }
    
    // oldal fal 2
    difference(){
        translate([0,-(d-t)/2,0])
        cube([w, t, h], center = true);
        rotate([90, 0, 0])
        translate([0,  cable_r/9, (d/2) - (t/2)])
        cylinder(h = (2 * t), r = cable_r, center = true);
        
        rotate([90, 0, 180])
        translate([0, cable_r+cable_r/9, -(d/2) + (t/2)])
        cube([(2*cable_r)+0.1,2*cable_r,cable_r], center = true);
    }
    //PCB holders
    rotate([90, 0, 90])
    translate([-t/2, -(h/2) + t, -(w/2) + (t)])
    cube([t,pcb_h,t], center = false);
    
    rotate([90, 0, -90])
    translate([-t/2, -(h/2) + t, -(w/2) + (t)])
    cube([t,pcb_h,t], center = false);
}

module prism(l, w, h){
    polyhedron(
        points=[[0,0,0], [l,0,0], [l,w,0], [0,w,0], [0,w,h], [l,w,h]],
        faces=[[0,1,2,3],[5,4,3,2],[0,4,5,1],[0,3,4],[5,2,1]]
    );
}

module neopixel(r, w){
    pcb_h = 0.9;
    led_s = 4.9;
    led_h = 2.65 - pcb_h;
    color([0,0.6,0])
    cylinder(h = pcb_h, r =r);
    color(c=[0.2,0.2,0.20])
    translate([0, 0,1])
    cube([led_s,led_s,led_h], center = true);
}

module cable(r, l){
    color([0.6,0,0],alpha=0.2)
    rotate([90,0,0])
    cylinder(h=l, r = r, center = false);
}

Credits

Turai Botond

5 projects • 21 followers

Check out my youtube channel for exciting projects: www.youtube.com/@botondturai

Shelf lighting

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Short summary

Design

Design the PCB mounts in OpenSCAD

Custom parts and enclosures

3D design

Schematics

Schematic

Code

Demo code for ESP-32

OpenSCAD script

Credits

Turai Botond

Comments

Embed the widget on your own site

Shelf lighting

Shelf lighting

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Short summary

Design

Design the PCB mounts in OpenSCAD

Custom parts and enclosures

3D design

Schematics

Schematic

Code

Demo code for ESP-32

OpenSCAD script

Credits

Turai Botond

Comments

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