supersquirrel72
Published © GPL3+

Dimming LED Strips Controlled with PIR Sensors and RTC!

This project will leave you with a pair of LED strips in your chosen location that are dimmed on and off based on a pair of PIR sensors.

IntermediateShowcase (no instructions)4,909
Dimming LED Strips Controlled with PIR Sensors and RTC!

Things used in this project

Hardware components

Arduino Uno R4 Pro - By OSEPP
×1
OSEPP Sensor Shield
Mine came in the 101 Sensor Basics starter kit.
×1
Real-Time Clock and Micro SD Breakout Board
This specific RTC is not necessary, but it's what I had. I think any RTC with a DS1307 chip will work with this code.
×1
Coin Cell Battery CR1220
For the RTC.
×1
PIR Motion Sensor (generic)
PIR Motion Sensor (generic)
One of mine came with the OSEPP "101 Sensor Basics" starter kit. I go the other from Fry's Electronics in Austin, TX.
×2
Adafruit Perma-Proto Breadboard, Quarter-size
You can use a solderless breadboard for testing, but I recommend soldering, if you can.
×1
Power MOSFET N-Channel
Power MOSFET N-Channel
×2
Resistor 10k ohm
Resistor 10k ohm
×2
Plastic Enclosure, Project Box
Plastic Enclosure, Project Box
I got one with a clear lid so I can show off my stuff. :-)
×1
Adafruit Standoff kit
I ended up using at least one of just about every part that came in this kit.
×1
Hook Up Wire Kit, 22 AWG
Hook Up Wire Kit, 22 AWG
Look for wire in lengths that will suit your project.
×1
LED strips by Novostella
I chose these because they are dimmable and simple, having only two wires to connect.
×2
Muzata 2M LED Channel system
Make sure to measure your desired location. I ordered a pack of 10, and have 7 left over...
×1
Muzata Extension connectors for the LED Channels
These help stabilize the track and keep the sections together.
×1
Muzata 10PCS LED Channel corner, L-shape adapter
I used these for making the frame around the closet door.
×1
Toggle Switch, Toggle
Toggle Switch, Toggle
Just about any switch will work here, so long as there is an "on" and an "off".
×1
Cat5/Cat6 Surface Mounting Box
×2

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free
Drill / Driver, Cordless
Drill / Driver, Cordless
This is to drill holes in your project box, and to mount the clips for the LED rails.
Drill bits, Assorted
Wire Stripper & Cutter, 26-14 AWG Solid & Stranded Wires
Wire Stripper & Cutter, 26-14 AWG Solid & Stranded Wires
Cross-tip "Phillips" screwdriver
Tape Measure, Manual
Tape Measure, Manual
Helping Hand Tool, with Magnifying Glass
Helping Hand Tool, with Magnifying Glass
Hacksaw
To cut the LED Channels.
Miter Box
Optional, but it helps make straight cuts.

Story

Read more

Schematics

Wire map, minus the sensors and Sensor Shield

This is my layout for wire placement. Use your skills or pictures from other sections in my project as a guide for the sensors and Shield.

Code

LED_Strip_03_RTC

C/C++
This program was made for my Arduino Uno R4, to operate a set of LED strips based on input from two motion sensors. The project incorporates a real-time clock, and is referenced in the code comments.
/*   5/8/2020
 *   Program by Gabriel Winkler
 *   
 *   This program uses the DS1307 real time clock to control two sets of LED strips.
 *   One set will fade up and down in brightness while the other will come on instantly.
 *   The two strips are triggered by a pair of PIR sensors, one for each strip.
*/
#include<Wire.h>                // This will be used by the Real Time Clock
#include<TimeLib.h>             // This too...
#include<RTClib.h>              // ...and this.

// Defining the pins for the two strips
#define HALL_LED 9
#define CLOSET_LED 6

int calTime = 20;               // This is the time we allow the sensors to calibrate
long unsigned int lowIn;        // This is the number of milliseconds the sensor must be LOW before
                                //  we assume motion has stopped
long unsigned int pause = 5000; // Our default pause time, 5 seconds.
boolean lockLow = true;         
boolean lockLow2 = true;        // Needed to separate the lockLow variables so the lights will turn off correctly
boolean takeLowTime;
boolean takeLowTime2;
int pirHallPin = 10;            // the pin that the PIR sensor is connected to for the hall light
                                // Pin 11 will be always on but very dim due to a small draw in amps...
int pirClosetPin = 11;          // the pin that the PIR sensor is connected to for the closet light

// Setting the variables for brightness
int bright = 255;
int nightBright = 20;
// Individual strip brightness values
int hallBright = 0;
int closetBright = 0;
int nightHallBright = 0;
int nightClosetBright = 0;

// Fade speed control. Higher numbers mean faster fading.
int fadeSpd = 10;
int nightFadeSpd = 2;

// For real-time clock:
RTC_DS1307 rtc;

void setup() {
  // This section is for the PIR sensor
  Serial.begin(9600); // Don't forget to set the serial monitor to this value...
  if(!rtc.begin()){
    Serial.println("RTC not working.");
    while(true);
  }
  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  pinMode(pirHallPin, INPUT);
  pinMode(pirClosetPin, INPUT);
  digitalWrite(pirHallPin, LOW);
  digitalWrite(pirClosetPin, LOW);
  //  Give the sensor time to calibrate...
  Serial.print("Calibrating sensor... ");
  for(int i = 0; i < calTime; i++){
    Serial.print("-");
    delay(1000);
  }
  Serial.println(" done.");
  Serial.println("*** SENSOR ACTIVE ***");
  delay(50);

  
  // Setting pins for output
  pinMode(HALL_LED, OUTPUT);
  pinMode(CLOSET_LED, OUTPUT);
//  pinMode(BUTTON, INPUT);
}

void TurnOnHall(){
  for (int i=0; i < 256; i++){
    analogWrite(HALL_LED, hallBright);
    hallBright += 1;
    delay(fadeSpd);
  }
  Serial.println("Hall Light on.");
}

void TurnOnCloset(){
//  for (int i=0; i < 256; i++){
  analogWrite(CLOSET_LED, bright);
//    closetBright += 1;
//    delay(fadeSpd);
//  }
  Serial.println("Closet light on.");
}

void TurnOffHall(){
  for (int i=0; i < 256; i++){
    analogWrite(HALL_LED, bright);
    bright -= 1;
    delay(fadeSpd);
  }
  Serial.println("Hall light off.");
}

void TurnOffCloset(){
//  for (int i=0; i < 256; i++){
    analogWrite(CLOSET_LED, closetBright);
//    bright -= 1;
//    delay(fadeSpd);
//  }
  Serial.println("Closet light off.");
}

void TurnOnHallNight() {
  for (int i=0; i < 20; i++){
    analogWrite(HALL_LED, nightHallBright);
    nightHallBright += 1;
    delay(nightFadeSpd);
  }
  nightHallBright = 0;
}

void TurnOnClosetNight(){
  for (int i=0; i < 20; i++){
    analogWrite(CLOSET_LED, nightClosetBright);
    nightClosetBright += 1;
    delay(nightFadeSpd);
  }
  nightClosetBright = 0;
}

void TurnOffHallNight() {
  for (int i=0; i < 20; i++){
    analogWrite(HALL_LED, nightBright);
    nightBright -= 1;
    delay(nightFadeSpd);
  }
  nightBright = 20;
  analogWrite(HALL_LED, 0);
}

void TurnOffClosetNight(){
  for (int i=0; i < 20; i++){
    analogWrite(CLOSET_LED, nightBright);
    nightBright -= 1;
    delay(nightFadeSpd);
  }
  nightBright = 20;
  analogWrite(CLOSET_LED, 0);
}

void TestFlash(){ // This is to help find where in the loop the program is.
  for (int i=0;i < 3;i++){
    analogWrite(HALL_LED, nightBright);
    delay(300);
    analogWrite(HALL_LED, 0);
    analogWrite(CLOSET_LED, nightBright);
    delay(300);
    analogWrite(CLOSET_LED, 0);
    delay(100);
  }
}

void loop() {
  // This will get the hour of the day from the RTC module
  DateTime now = rtc.now();           // Sets the "now" variable to the current time
//  Serial.print("Hour: ");           
//  Serial.println(now.hour(), DEC);  // This lets us see what the hour is reading

// This if statement will use the hour of the day to decide day or night ops
// Changing the high number will adjust the hour when the night settings take over.
// Changing the low number will adjust the hour when the night settings stop.
  if(now.hour() >= 21 || now.hour() <= 9){
      // TurnOnHallNight will be for the hall LED strip
    if(digitalRead(pirHallPin) == HIGH){
      if(lockLow){
        lockLow = false;
        Serial.println("---");
        Serial.print("Night motion detected in the hall at ");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        delay(50);
        TurnOnHallNight();
      }
      takeLowTime = true;
    }
    if(digitalRead(pirHallPin) == LOW){
      if(takeLowTime){
        lowIn = millis();
        takeLowTime = false;
      }
      if(!lockLow && millis() - lowIn > pause){
        lockLow = true;
        Serial.print("Night motion ended in the hall at ");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        
        TurnOffHallNight();
      }
    }
  
   // TurnOnClosetNight will be for the closet LED strip.
    if(digitalRead(pirClosetPin) == HIGH){
      if(lockLow2){
        lockLow2 = false;
        Serial.println("---");
        Serial.print("Night motion detected in the closet at ");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        delay(50);
        TurnOnClosetNight();
      }
      takeLowTime2 = true;
    }
    if(digitalRead(pirClosetPin) == LOW){
      if(takeLowTime2){
        lowIn = millis();
        takeLowTime2 = false;
      }
      if(!lockLow2 && millis() - lowIn > pause){
        lockLow2 = true;
        Serial.print("Night motion ended in the closet at ");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        TurnOffClosetNight();
      }
    }
  }
// Below this should all be for daytime running...
  else{ 
      // TurnHallOn will be for the hall, and should be called in the first two "if" statements.
    if(digitalRead(pirHallPin) == HIGH){
      if(lockLow){
        lockLow = false;
        Serial.println("---");
        Serial.print("Motion detected in the hall at ");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        delay(50);
        TurnOnHall();
      }
      takeLowTime = true;
    }
    if(digitalRead(pirHallPin) == LOW){
      if(takeLowTime){
        lowIn = millis();
        takeLowTime = false;
      }
      if(!lockLow && millis() - lowIn > pause){
        lockLow = true;
        Serial.print("Motion ended in the hall at ");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        TurnOffHall();
      }
    }
  
   // TurnClosetOn will be for the closet, and should be called in the second two "if" statements.
    if(digitalRead(pirClosetPin) == HIGH){
      if(lockLow2){
        lockLow2 = false;
        Serial.println("---");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        delay(50);
        TurnOnCloset();
      }
      takeLowTime2 = true;
    }
    if(digitalRead(pirClosetPin) == LOW){
      if(takeLowTime2){
        lowIn = millis();
        takeLowTime2 = false;
      }
      if(!lockLow2 && millis() - lowIn > pause){
        lockLow2 = true;
        Serial.print("Motion ended in the closet at ");
        Serial.print(now.hour(), DEC);
        Serial.print(":");
        Serial.println(now.minute(), DEC);
        TurnOffCloset();
      }
    }
  }
}

Credits

supersquirrel72

supersquirrel72

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