Hi all,

Just wanted to show you all my motion-activated LED Porch Light. Lots of 12v LED lights on here, not so many mains AC-powered bulb projects, so I thought I'd show you mine. Sketch is a standard motion sensor interrupt sketch alongside a dimming sketch, I'm sure I got it from the forums. Initially I wanted it to perform local control of the lamp via the PIR but then decided I wanted the light to come on low (33%) from dusk till dawn, and then raise to 100% when it detects motion. Because of that I've left the control logic to Vera. Below about 30% the bulb shows an obvious unstable flicker so I don't go there! Dimming and ramp up/down is beautifully smooth.

It consists of:

Arduino Nano
NRF24L01 radio
HLK-PM01 240v AC>5v DC
HC-SR501 (PIR)
240v AC Phase control dimming circuit: http://www.ebay.com/itm/111764492631
4w dimmable filament LED bulb
Wall box with blanking plate

https://youtu.be/g7UY0zDP7zU

@sundberg84 That was definitely on the cards...but it looks like I might have got it working. I did 4 things in one go, which is unlike me, so now I have to break things down to see which one helped (if it wasn't all)...1st thing was a 4700uF cap over the arduino VIN/GND, 2nd was a 1000uF cap over the relay +- 5v,… 3rd was to reflow a few of the GND solders and finally I dropped the voltage regulator from 8v to just under 7v...and hey presto...

https://youtu.be/jj8wo7NME6U

So it kept failing after 2 or 3 rings...frustrating! I enabled all the debug and noticed it kept failing just before sending out the "off" message. It didn't reset, just stalled. This was the case even when powered by USB. And then I remembered how sensitive the NRFs are to fluctuations in power and I hadn't got round to putting a cap on there yet!!! I put a spare 1000uF (47uF are on order) and so far it hasnt caused me any further issues! So now I've got 3 huge capacitors on there, and it looks ok...touch wood.

@mfalkvidd So keep trying IRLZ44N FETs?

Hi guys,

Struggling with this a little and think it may be hardware related. I'm using a 3.3v pro mini and it won't let the 12v LEDs go to full brightness, at max dim level they're still quite dim. I've tried this on both regular flexi LED strip and the copper-wire type LEDs (final project is based on these).

I've tried with a different FET, an IRLB8721 and that goes to full brightness however won't switch the LEDS off completely so guessing there's a leak from that FET! I'm not sure if that's normal or not. Frustrating.

Ideally i want the circuitry to be 3.3v as i'm already converting the 12v LED power supply down to 3.3v for the nRF. I'd rather not have a 5v and 3.3v regulator.

Thanks,

Patrick

@5546dug Hi Doug,

Here you go. Annoyingly my PIR seems to have died after a week or so. Hoping it's a faulty unit rather than anything to do with the circuit. I've ordered another, and will see how it holds up. It seems i can trigger it by touching the unit in places, but the PIR sensor itself is dead and not detecting anything.

/*
AC Light Control
Uses up and down buttons to set levels
makes use of a timer interrupt to set the level of dimming
*/
#include <SPI.h>
#include <MySensor.h>  
#include <TimerOne.h>

#define SN "AC LED Porch Dimmer Control"
#define SV "1.3"
#define NODE_ID 30  //change to a number to assign a specific ID
#define FADE_DELAY 20  // Delay in ms for each percentage fade up/down (10ms = 1s full-range dim)
#define MOTION_CHILD 1  //ID of the motion sensor child
#define MOTION_PIN  2  // Arduino pin tied to trigger pin on the motion sensor.

volatile int i=0;               // Variable to use as a counter of dimming steps. It is volatile since it is passed between interrupts
volatile boolean zero_cross=0;  // Flag to indicate we have crossed zero
int AC_pin = 7;                 // Output to Opto Triac
int freqStep = 75;              // This is the delay-per-brightness step in microseconds. It allows for 128 steps
                                // If using 60 Hz grid frequency set this to 65
MySensor gw;

//dimming
static int currentLevel = 128;  // Current dim level...
uint8_t fadeLevel = 128; //used to store the fade level when using the buttons

//motion sensor
uint8_t lastMotion = 0;
unsigned long previousMillis = 0; // last time update //see http://stackoverflow.com/questions/10773425/performing-a-function-after-x-time for more details on this
unsigned long motionDelay = 10000; // interval at which to keep motion sensor trippped (milliseconds).  Used to prevent too frequent updates to Vera. 

boolean metric = true; 

MyMessage dimmerMsg(AC_pin, V_DIMMER);
MyMessage lightMsg(AC_pin, V_LIGHT);
MyMessage motionMsg(MOTION_CHILD, V_TRIPPED);

void setup() {  // Begin setup
  Serial.begin(115200);
  Serial.println( SN ); 
  gw.begin( incomingMessage,  NODE_ID, true);
  // Register the LED Dimmable Light with the gateway
  gw.present( 6, S_DIMMER );
  gw.sendSketchInfo(SN, SV);
  // Pull the gateway's current dim level - restore light level upon sendor node power-up
  gw.request( 6, V_DIMMER );
  gw.present(MOTION_CHILD, S_MOTION);
  
  //Setup AC PIN
  pinMode(AC_pin, OUTPUT);                          // Set the Triac pin as output
  attachInterrupt(1, zero_cross_detect, RISING);    // Attach an Interupt to Pin 2 (interupt 0) for Zero Cross Detection
  Timer1.initialize(freqStep);                      // Initialize TimerOne library for the freq we need
  Timer1.attachInterrupt(dim_check, freqStep);      // Go to dim_check procedure every 75 uS (50Hz)  or 65 uS (60Hz)
  // Use the TimerOne Library to attach an interrupt
}

void zero_cross_detect() {    
  zero_cross = true;               // set flag for dim_check function that a zero cross has occured
  i=0;                             // stepcounter to 0.... as we start a new cycle
  digitalWrite(AC_pin, LOW);
}                                 

// Turn on the TRIAC at the appropriate time
// We arrive here every 75 (65) uS
// First check if a flag has been set
// Then check if the counter 'i' has reached the dimming level
// if so.... switch on the TRIAC and reset the counter

void dim_check() {                   
  if(zero_cross == true) {              
    if(i>=fadeLevel) {                     
      digitalWrite(AC_pin, HIGH);  // turn on light       
      i=0;  // reset time step counter                         
      zero_cross=false;    // reset zero cross detection flag
                      } 
    else {
      i++;  // increment time step counter                     
    }                                
  }    
}

void loop() {  
    gw.process();

  //motion sensor code
  unsigned long currentMillis = millis();
  
     if(currentMillis - previousMillis > motionDelay){
      uint8_t motionDetect = digitalRead(MOTION_PIN);
        if(motionDetect != lastMotion){
//        Serial.print("motionDetect Value: ");
//        Serial.println(motionDetect);
          gw.send(motionMsg.set(motionDetect));  // Send tripped value to gw
          if(motionDetect == 1){
          previousMillis = currentMillis;  //"Tripped" delay 
          }
          else{
          previousMillis = currentMillis - motionDelay + 1000; //"Not tripped" delay for 1 second to stop rapid "not tripped" and "tripped" updates to Vera
          }
      lastMotion = motionDetect; 
    }    
  }
}

void incomingMessage(const MyMessage &message) {
  if (message.type == V_LIGHT || message.type == V_DIMMER) {
    
    //  Retrieve the power or dim level from the incoming request message
    int requestedLevel = atoi( message.data );
    
    // Adjust incoming level if this is a V_LIGHT variable update [0 == off, 1 == on]
    requestedLevel *= ( message.type == V_LIGHT ? 100 : 1 );
    
    // Clip incoming level to valid range of 0 to 100
    requestedLevel = requestedLevel > 100 ? 100 : requestedLevel;
    requestedLevel = requestedLevel < 0   ? 0   : requestedLevel;
    
    float percent_level;
    percent_level = 128 - (requestedLevel * 1.28);
    fadeToLevel( percent_level );
    Serial.print( "Changing level to " );
    Serial.print( requestedLevel );
    Serial.print( ", from " ); 
    Serial.println( currentLevel );
    // Inform the gateway of the current DimmableLED's SwitchPower1 and LoadLevelStatus value...
    //gw.send(lightMsg.set(currentLevel > 0 ? 1 : 0));
  
    // hek comment: Is this really nessesary?
    // gw.send( dimmerMsg.set(requestedLevel) );
  }
}

/***
 *  This method provides a graceful fade up/down effect
 */

void fadeToLevel( int toLevel ) {
 Serial.print("currentLevel Value: ");
 Serial.println(currentLevel);
 Serial.print("toLevel Value: ");
 Serial.println(toLevel);

  int delta = ( currentLevel - toLevel ) < 0 ? 1 : -1;
  Serial.print("delta Value: ");
 Serial.println(delta);
  while ( currentLevel != toLevel ) {
    currentLevel += delta;

 fadeLevel= ((int)currentLevel);
    delay( FADE_DELAY );
    //fadeLevel = toLevel;
  }
}```

No problem, happy I could have been of some help!

What's nice is that mysensors triggers so fast that it grabs a security cam image from before the camera has caught up!! Excuse the driveway...

Hi all,

Just wanted to show you all my motion-activated LED Porch Light. Lots of 12v LED lights on here, not so many mains AC-powered bulb projects, so I thought I'd show you mine. Sketch is a standard motion sensor interrupt sketch alongside a dimming sketch, I'm sure I got it from the forums. Initially I wanted it to perform local control of the lamp via the PIR but then decided I wanted the light to come on low (33%) from dusk till dawn, and then raise to 100% when it detects motion. Because of that I've left the control logic to Vera. Below about 30% the bulb shows an obvious unstable flicker so I don't go there! Dimming and ramp up/down is beautifully smooth.

It consists of:

Arduino Nano
NRF24L01 radio
HLK-PM01 240v AC>5v DC
HC-SR501 (PIR)
240v AC Phase control dimming circuit: http://www.ebay.com/itm/111764492631
4w dimmable filament LED bulb
Wall box with blanking plate

https://youtu.be/g7UY0zDP7zU

Hi guys,

I'm struggling with this one unfortunately, i can't get it to trip/untrip.

Sketch is identical to the motion example.

I've removed the photo diode (not bridged the gap, it looks like bridging the gap stops it from tripping at all, leaving it open means it trips whatever the light level is). This was tested without connecting to the arduino, working as normal.

So i've removed resistor 17, and connected my arduino pin 4 up to the chip side of where R17 was. I'm running the main board of the existing power lines, but i've tapped into the + of the middle battery and that's going to VCC on the arduino. Arduino nano GND is connected to the main board -.

Where am I going wrong? I've tried this on two boards now and they're both acting the same. Serial monitor is just showing me:

send: 14-14-4-0 s=1,c=1,t=16,pt=0,l=1,sg=0,st=ok:1
1
send: 14-14-4-0 s=1,c=1,t=16,pt=0,l=1,sg=0,st=ok:1
1
send: 14-14-4-0 s=1,c=1,t=16,pt=0,l=1,sg=0,st=ok:1
1

Thanks,

Patrick

It still looks to be having issues looks like the arduino will hang just before sending the command to untrip.

So it kept failing after 2 or 3 rings...frustrating! I enabled all the debug and noticed it kept failing just before sending out the "off" message. It didn't reset, just stalled. This was the case even when powered by USB. And then I remembered how sensitive the NRFs are to fluctuations in power and I hadn't got round to putting a cap on there yet!!! I put a spare 1000uF (47uF are on order) and so far it hasnt caused me any further issues! So now I've got 3 huge capacitors on there, and it looks ok...touch wood.

@sundberg84 That was definitely on the cards...but it looks like I might have got it working. I did 4 things in one go, which is unlike me, so now I have to break things down to see which one helped (if it wasn't all)...1st thing was a 4700uF cap over the arduino VIN/GND, 2nd was a 1000uF cap over the relay +- 5v,… 3rd was to reflow a few of the GND solders and finally I dropped the voltage regulator from 8v to just under 7v...and hey presto...

https://youtu.be/jj8wo7NME6U

I've just tried it with both 1000uF and then a 4700uF cap across VIN/GND on the arduino with only slightly better results. It'll ring, but the relay stays open most of the time and the arduino needs resetting to release it