2 Arduino program sketches for the NeoPixel led strips and rings. The sketeched depends on the 'Adafuit Neopixel library', which you might need to install in your Arduino IDE:
- Tools -> Manage Libraries -> search for "Neopixel" and select and install "Adafruit Neopixel"
Stair LedLights, using NeoPixel Ledstrips and an Arduino.
- drives a configurable number of led-strips (one ledstrip per stair step)
- with configurable number of leds per strip
- switches on or off in top-down or bottom-top direction
- supports a Light dependent resistor (LDR), when enabled (useLDR=true), led lights will not turned on during daylight.
- has a nice "breathe" function when stairs are not used (smoothly up and down of intensity of each led-strip)
- has setting BRIGHTNESS to controll the brightness of the LEDSs
// Which pin on the Arduino is connected to the NeoPixels?
#define PIN 5 // Pin used for the NeoPixels
// How many NeoPixels are attached to the Arduino?
#define LEDSPERSTRIP 36 // Number of leds per strip
#define LEDSTRIPS 16 // Number of stair steps (led strips)
#define BRIGHTNESS 35 // Brightness setting of the leds. Higher value gives more brightness
// Configuration of the Passive Infrared (PIR)
int alarmPinTop = 10; // PIR at the top of the stairs
int alarmPinBottom = 11; // PIR at the bottom of the stairs
// Configuration of the Light dependent resistor (LDR)
bool useLDR = true; // flag, when true the program uses the LDR, set to "false" if you don't have a LDR sensor.
int LDRSensor = A0; // Light dependent resistor, Analog Input line
long LDRThreshold = 600; // Only switch on LED's at night when LDR senses low light conditions
// => you may have to change this value for your circumstances!//-------------------------------------------------------------------------
// Tuning part for the Breathe effect and turn-on and turn-off speed
//-------------------------------------------------------------------------
int change = 2; // used in 'breathing' the LED's , make value smalle to make it smoother, or higher to make it faster
int breathe = 25; // used in 'breathing' the LED's.
int turnOnSpeed = 250; // speed to turn on next led-strip, in msec between next strip
int turnOffSpeed = 100; // speed to turn on next led-strip, in msec between next strip
int keepLedsOnTime = 18000; // keep leds on for at least .. msec.
int keepLedsOffTime = 1500; // keep leds off for at least .. msec.
#define BREATHELEDS 1 // Number of leds used in breathe function.
// NOTE: The number indicates the number of Begin Leds and Last leds per strip
// so with setting the first and last leds would be used for the breathe function.Using the Serial monitor, via tools->Serial monitor (or Ctl-Shift-M), you can view the serial output and verify your configuration. The connection details of the strips, Passive Infra Red sensor and LDR sensor can be found in this image: Connection Details
Just a cool script to smoothly brighten and soften the leds in a nice color. I used 2 NeoPixel rings with 60 leds each and used a blue calm color... but change it to your needs of course...
// Which pin on the Arduino is connected to the NeoPixels?
#define PIN 6 // Pin 6 used for the NeoPixels
// How many NeoPixels are attached to the Arduino?
#define NUMBEROFRING 2 // Number of (equal size) NeoPixel rings
#define LEDSPERRING 60 // Number of Pixels per ring
#define NUMPIXELS NUMBEROFRING*LEDSPERRING