This instructable is step by step how to build a touch led table

Step 1: Step 1: Get a Square Table

I used a small bedside table purchased from walmart

Step 2: Step 2: Cut a Hole in the Table

The next step was to cut a square hole in the top of the table and then I spray painted the entire table flat black. I also drilled a hold in the side of the table for the power cord to go later.

Step 3: Step 3: Ardino Code and Breadboard

I started with the following code and a push button with the setup shown to power the led strip.

CODE:

// This is a demonstration on how to use an input device to trigger changes on your neo pixels.

// You should wire a momentary push button to connect from ground to a digital IO pin. When you

// press the button it will change to a new pixel animation. Note that you need to press the

// button once to start the first animation!

#include

#define BUTTON_PIN 2 // Digital IO pin connected to the button. This will be

// driven with a pull-up resistor so the switch should

// pull the pin to ground momentarily. On a high -> low

// transition the button press logic will execute.

#define PIXEL_PIN 6 // Digital IO pin connected to the NeoPixels.

#define PIXEL_COUNT 30

// Parameter 1 = number of pixels in strip, neopixel stick has 8

// Parameter 2 = pin number (most are valid)

// Parameter 3 = pixel type flags, add together as needed:

// NEO_RGB Pixels are wired for RGB bitstream

// NEO_GRB Pixels are wired for GRB bitstream, correct for neopixel stick

// NEO_KHZ400 400 KHz bitstream (e.g. FLORA pixels)

// NEO_KHZ800 800 KHz bitstream (e.g. High Density LED strip), correct for neopixel stick

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

bool oldState = HIGH;

int showType = 0;

void setup() {

pinMode(BUTTON_PIN, INPUT_PULLUP);

strip.begin();

strip.show(); // Initialize all pixels to 'off'

}

void loop() {

// Get current button state.

bool newState = digitalRead(BUTTON_PIN);

// Check if state changed from high to low (button press).

if (newState == LOW && oldState == HIGH) {

// Short delay to debounce button.

delay(20);

// Check if button is still low after debounce.

newState = digitalRead(BUTTON_PIN);

if (newState == LOW) {

showType++;

if (showType > 10)

showType=0;

startShow(showType);

}

// Set the last button state to the old state.

oldState = newState;

}

void startShow(int i) {

switch(i){

case 0: colorWipe(strip.Color(0, 0, 0), 50); // Black/off

break;

case 1: colorWipe(strip.Color(255, 0, 0), 50); // Red

break;

case 2: colorWipe(strip.Color(255, 96, 0), 50); // orange

break;

case 3: colorWipe(strip.Color(255, 255, 0), 50); // yellow needs help

break;

case 4: colorWipe(strip.Color(0, 255, 0), 50); // green

break;

case 5: colorWipe(strip.Color(0, 0, 255), 50); // blue

break;

case 6: colorWipe(strip.Color(38, 222, 220), 50); // Teal

break;

case 7: colorWipe(strip.Color(75, 0, 13), 50); // Purple

break;

case 8: colorWipe(strip.Color(255, 0, 255), 50); // Pink

break;

case 9: colorWipe(strip.Color(252, 253, 253), 50); // white

break;

}

// Fill the dots one after the other with a color

void colorWipe(uint32_t c, uint8_t wait) {

for(uint16_t i=0; i

strip.setPixelColor(i, c);

strip.show();

delay(wait);

}

void rainbow(uint8_t wait) {

uint16_t i, j;

for(j=0; j<256; j++) {

for(i=0; i

strip.setPixelColor(i, Wheel((i+j) & 255));

}

strip.show();

delay(wait);

}

// Input a value 0 to 255 to get a color value.

// The colours are a transition r - g - b - back to r.

uint32_t Wheel(byte WheelPos) {

WheelPos = 255 - WheelPos;

if(WheelPos < 85) {

return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);

} else if(WheelPos < 170) {

WheelPos -= 85;

return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);

} else {

WheelPos -= 170;

return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);

}

Step 4: Step 4: Changing the Code

The next was modifying the code to account for the capacitive touch.

CODE:

#include #include

#define PIXEL_PIN 6 // Digital IO pin connected to the NeoPixels.

#define PIXEL_COUNT 30 int showType; Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800); CapacitiveSensor tapper = CapacitiveSensor(2, 4);

void setup() { tapper.set_CS_AutocaL_Millis(0xFFFFFFFF); // turn off autocalibrate on channel 1 - just as an example Serial.begin(9600); strip.begin(); strip.show(); // Initialize all pixels to 'off

}

void loop() { long total1 = tapper.capacitiveSensor(30);

if (total1 >= 300) { if (showType > 9){ showType = 0; startShow(showType);} else { startShow(showType); showType++; } }

Serial.print("\t"); // tab character for debug window spacing Serial.print("\t"); Serial.print(total1); // print sensor output 1 Serial.print("\n");

}

void startShow(int i) {

switch (i) { case 0: colorWipe(strip.Color(0, 0, 0), 50); // Black/off break;

case 1: colorWipe(strip.Color(255, 0, 0), 50); // Red break;

case 2: colorWipe(strip.Color(255, 96, 0), 50); // orange break;

case 3: colorWipe(strip.Color(255, 255, 0), 50); // yellow needs help break;

case 4: colorWipe(strip.Color(0, 255, 0), 50); // green break;

case 5: colorWipe(strip.Color(0, 0, 255), 50); // blue break;

case 6: colorWipe(strip.Color(38, 222, 220), 50); // Teal break;

case 7: colorWipe(strip.Color(75, 0, 13), 50); // Purple break;

case 8: colorWipe(strip.Color(255, 0, 255), 50); // Pink break;

case 9: colorWipe(strip.Color(252, 253, 253), 50); // white

} }

int lightCycle = 0;

// Fill the dots one after the other with a color void colorWipe(uint32_t c, uint8_t wait) { for (uint16_t i = 0; i < strip.numPixels(); i++) { strip.setPixelColor(i, c); strip.show(); delay(wait); } }

// Input a value 0 to 255 to get a color value. // The colours are a transition r - g - b - back to r. uint32_t Wheel(byte WheelPos) { WheelPos = 255 - WheelPos; if (WheelPos < 85) { return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3); } else if (WheelPos < 170) { WheelPos -= 85; return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3); } else { WheelPos -= 170; return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0); } }

Step 5: Step 5: Putting the Table Together

The next thing I did was put aluminum inside the cut out in the table, and then put a piece of plexiglass underneath and attached the capacitive touch wire to the aluminum and super glued the led strip on the inside of the table.

Step 6: Step 6: Finalizing

The last step was to put a mirror underneath the plexiglass and the led strip to help shine the light upward and then mounted both boards to a piece of wood and screwed it onto the bottom of the table.

Step 7: LED Touch Table

Final Code:

#include <CapacitiveSensor.h>
#include <Adafruit_Neopixel.h>

#define PIXEL_PIN 6 // Digital IO pin connected to the NeoPixels.

#define PIXEL_COUNT 28 int showType; Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800); CapacitiveSensor tapper = CapacitiveSensor(2, 4);

void setup() { tapper.set_CS_AutocaL_Millis(0xFFFFFFFF); // turn off autocalibrate on channel 1 - just as an example Serial.begin(9600); strip.begin(); strip.show(); // Initialize all pixels to 'off

}

void loop() { long total1 = tapper.capacitiveSensor(30);

if (total1 >= 2000) { if (showType > 9){ showType = 0; startShow(showType);} else { startShow(showType); showType++; } }