Fairy simple project for Christmas

Comments

• mpark Posts: 1,305

  2021-12-06 05:59

  Most. confusing. background. ever.

  I hope you'll post the finished bottle!
• Phil Pilgrim (PhiPi) Posts: 23,514

  2021-12-06 07:18

  Most. confusing. background. ever.

  You've never seen a vintage formica countertop?

  -Phil
• iseries Posts: 1,453

  2021-12-06 12:14

  Sorry, got sidetracked looking for fairy patterns to use. Ended up at XLights trying to see if that would work with the P1. A little over kill for lighting up a bottle.

  Anyway, here is the bottle with all 42 feet of wire and 120 LED's. I think I'm wired after that bottle, but my wife said I picked a crappy bottle, and we will work on finding another one.

  Fairy Lights in the Bottle

  Here is the code I settled on to drive the LED's. I think I'm going to change up the pattern as the P1 Mini gets a little toasty.

  Cheers,

  #include "simpletools.h"
  
  #define PIN1 7
  #define PIN2 6
  #define PIN3 5
  #define PIN4 15
  #define PIN5 14
  #define PIN6 13
  
  void setLEDS(int);
  void setChase(int);
  
  
  unsigned char LEDS[6] = {PIN1, PIN2, PIN3, PIN4, PIN5, PIN6};
  int Leds = 6;
  
  
  int main()
  {
  
    setLEDS(1);
  
    while(1)
    {
      pause(1000);
      setChase(0);
    }  
  }
  
  void setLEDS(int state)
  {
    for (int i=0;i<Leds;i++)
      if (state)
        high(LEDS[i]);
      else
        low(LEDS[i]);
  }
  
  void setChase(int state)
  {
    setLEDS(state);
  
    for (int i=0;i<Leds;i++)
    {
      if (state)
        low(LEDS[i]);
      else
        high(LEDS[i]);
      pause(500);
      if (state)
        high(LEDS[i]);
      else
        low(LEDS[i]);
    }
  
    setLEDS(state);
  }
  

  Mike
• iseries Posts: 1,453

  2021-12-06 14:23

  I had a chance to hookup an INA260 unit just to see what power I was really drawing.

  With all on chase it reads about 175ma and with all off chase it was about 31ma at 7.51 volts.

  This is close to my original current calculations.

  By varying ever 10 seconds the two patterns the P1 runs worm but not hot.

  Mike
• iseries Posts: 1,453

  2021-12-15 12:58

  I've upped my game!

  After looking at this for a while now I noticed that the LED's were rather bright even running them at the lower voltage.

  Well, the only way to dim them is to use PWM and vary the duty cycle applied to the LED's. That will require a little more code then just setting the LED's high or low. I will have to use a cog and pulse each of the pins at a frequency to lower the light level each LED gives off.

  Now we need to pulse all the LEDs at the same time, so they all look the same. To do that we could use 6 cogs and put each LED into a cog, but the better alternative is to just cycle through all the LEDs and turn them on or off when they hit the duty cycle I want.

  void DoLEDS(void *par)
  {
    while (1)
    {
      for (int j=0;j<100;j++)
      {
        for (int i=0;i<Leds;i++)
        {
          if (BrightNess[i] > j)
            low(LEDS[i]);
          else
            high(LEDS[i]);
        }
      }
    }
  }
  

  So now I need to change all my code from on/off to a brightness level. While I was at it, I decided to add a new pattern to the sequence called Ramp.

  Here is the updated code with the new sequences:

  #include "ina260.h"
  #include "simpletools.h"
  
  //#define DEBUG
  
  void DoLEDS(void *);
  void setBrightNess(int, int);
  void setLEDS(int);
  void doChase(int);
  void doRamp(int);
  
  #define PIN1 7
  #define PIN2 6
  #define PIN3 5
  #define PIN4 15
  #define PIN5 14
  #define PIN6 13
  #define INACLK 18
  #define INADTA 17
  #define BRIGHTNESS 25
  
  unsigned char LEDS[6] = {PIN1, PIN2, PIN3, PIN4, PIN5, PIN6};
  volatile unsigned char BrightNess[6];
  int Leds = 6;
  
  int i, j;
  
  int main()
  {
    int sequence;
  
    for (i=0;i<Leds;i++)
      BrightNess[i] = 0;
  
    i = INA260_open(INACLK, INADTA);
  
    setLEDS(1);
  
    cog_run(&DoLEDS, 50);
  
    sequence = 0;
    while(1)
    {
      for (i=0;i<10;i++)
      {
        switch (sequence)
        {
          case 0: doChase(0);
                  break;
          case 1: doChase(1);
                  break;
          case 2: doRamp(0);
                  break;
          case 3: doRamp(1);
                  break;
        }
        pause(1000);
      }
      i = INA260_getVoltage();
  #ifdef DEBUG
      j = INA260_getCurrent();
      printi("Sequence: %d, Voltage: %d, Current: %d\n", sequence, i, j);
  #endif
      if (i < 650)
      {
        setLEDS(0);
        while (1)
          pause(1000);
      }
      sequence++;
      sequence = sequence & 0x03;
    }
  }
  
  void setLEDS(int percent)
  {
    for (int i=0;i<Leds;i++)
      setBrightNess(i, percent);
  }
  
  void doChase(int state)
  {
    if (state)
      setLEDS(0);
    else
      setLEDS(BRIGHTNESS);
  
    pause(500);
    for (int i=0;i<Leds;i++)
    {
      if (state)
        setBrightNess(i, BRIGHTNESS);
      else
        setBrightNess(i, 0);
      pause(500);
      if (state)
        setBrightNess(i, 0);
      else
        setBrightNess(i, BRIGHTNESS);
    }
  }
  
  void doRamp(int state)
  {
    if (state)
      setLEDS(0);
    else
      setLEDS(BRIGHTNESS);
  
    pause(500);
    for (int i=0;i<Leds;i++)
    {
      if (state)
        setBrightNess(i, BRIGHTNESS);
      else
        setBrightNess(i, 0);
      pause(500);
    }
  }
  
  void DoLEDS(void *par)
  {
    while (1)
    {
      for (int j=0;j<100;j++)
      {
        for (int i=0;i<Leds;i++)
        {
          if (BrightNess[i] > j)
            low(LEDS[i]);
          else
            high(LEDS[i]);
        }
      }
    }
  }
  
  void setBrightNess(int led, int percent)
  {
    BrightNess[led] = percent;
  }
  

  Because I now run the LEDs at 25% I am able to run with very low current and the P1 runs a lot cooler.

  Mike