Chromotherapy Christmas House

thingiverse

This project is fun because it combines arduino circuits and code with laser cutting and 3d printing. It uses an RGB LED and PWM to make a delightful chromotherapeutic holiday effect. What you need: - Arduino Uno - Laser Cutter - 3d Printer - 6mm Birch wood - Plastic house or toy - 3 220 Ohm resistors - jumper cables and wires Step 1: Cut out the wood backing with a laser cutter (file included). 2: Attach the feet to the backing with glue. 3: Fasten the Arduino to backing with 3mm screws. 4: Attach mini breadboard to backing with double sided tape. 5: 3D print the clips. 6: Hook up Arduino circuit like that shown in the diagram. 7: Upload the RBG fade sketch to the Arduino. 8: Find a plastic toy to put on top. Credits: For the PWM code for LED: https://create.arduino.cc/projecthub/Shahirnasar/simple-rgb-led-light-with-fade-635bc2 Code: // variables to hold the LED color int rVal = 254; int gVal = 1; int bVal = 127; int rDir = -1; int gDir = 1; int bDir = -1; // constants to name the pins const int rPin = 11; const int gPin = 10; const int bPin = 9; void setup() { // declare the pinModes pinMode(rPin, OUTPUT); pinMode(gPin, OUTPUT); pinMode(bPin, OUTPUT); pinMode(A0, INPUT); Serial.begin(9600); } void loop() { // PWM the LED // when using a common anode RGB LED like the ones in // your kits, you create a voltage difference across // each diode to light up the LED, that is, a PWM value // of 255 will turn that light off, while a PWM value of 0 // will turn that light on fully. Serial.println(analogRead(A0)); if (analogRead(A0) < 400) { analogWrite(rPin, rVal); analogWrite(gPin, gVal); analogWrite(bPin, bVal); // change the values of the LEDs rVal = rVal + rDir; gVal = gVal + gDir; bVal = bVal + bDir; // for each color, change direction if // you reached 0 or 255 if (rVal >= 255 || rVal <= 0) { rDir = rDir * -1; } if (gVal >= 255 || gVal <= 0) { gDir = gDir * -1; } if (bVal >= 255 || bVal <= 0) { bDir = bDir * -1; } } else { digitalWrite(9, LOW); digitalWrite(10, LOW); digitalWrite(11, LOW); } // slight delay so it doesn't rotate color too quicky delay(33); }