{{:projekte:bbfront.jpg?300|}}

====== BerlinBadge rev1 ======

Contact: [[user:nopx|nopx]]

Projectstatus: [[projekte:projektstatus|{{:projekte:done.png?50|}}]]

===== Summary =====

[[https://twitter.com/vspaceone/status/1209177753842585602|Twitterlink zu Video!]]

===== Pictures =====

{{:projekte:berlinbadgebacak.jpg?300|}}
{{:projekte:2019:photo_2021-05-15_12-20-07.jpg?300|}}
{{:projekte:2019:photo_2021-05-15_12-20-08.jpg?300|}}
===== Hardware =====

{{ :projekte:berlinbadge.pdf |Schematic BerlinBadge_rev1}}

===== BOM =====
^ Label ^ Qty ^ Value ^ Footprint ^ Description ^
| BT1 | 1 | Connector | JST PH 2.00mm 2-Pins Horizontal | |
| C1, C4, C7, C9, C10, C13, C14 | 7 | 100nF | 0805 C | |
| C2, C3, C5, C6, C8, C11 | 6 | 2.2uF | 0805 C | |
| C12 | 1 | 4.7uF | 0805 C | |
| D1, D2, D3, D4, D5, D6, D7, D8 | 8 | WS2812B | 5050 LED P3.2mm | |
| D9 | 1 | ca. 3V 10mA LED (Yellow) | 0805 LED | |
| J1 | 1 | Connector | 2x3 Odd_Even Pinheader 2.54mm Vertical NOT MOUNTED | |
| J2 | 1 | USB A | USB A Stewart SS52100-001 Horizontal | |
| JP1 | 1 | - | nothing to mount | Solder to match the maximum voltage of the battery | |
| P1 | 1 | - | nothing to mount | AVR ISProgrammer, [[projekte:2019:maxconnect|MaxConnect Link]] | 
| R1, R3 | 2 | 10K | 0805 R | |
| R2 | 1 | 1K | 0805 R | series resistor for D9, match current! |
| R4, R5, R6, R7, R8, R9 | 6 | 0R | 0805 R | just for layouting reasons |
| SW1 | 1 | Switch | SPDT_PCM12 | Example: [[https://www.amazon.de/gp/product/B07VF4MW5W/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1|Amazon Link]] |
| U1 | 1 | ATTiny85-20SU | SOIJ-8_5.3x5.3mm P1.27mm | [[https://www.reichelt.de/mcu-attiny-avr-risc-8-kb-20-mhz-so-8-attiny-85-20-su-p69300.html?&trstct=pos_3|Reichelt ATTINY85-20SU]] |
| U2 | 1 | MAX1811 | SOIC-8_3.9x4.9mm P1.27 | |

===== Software =====
This is the arduino code running on rev1. You need to install the neopixel lib and compile for Attiny85 with **internal 16MHz**!
<code C>
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif


#define LED_PIN     PB1
#define LED_COUNT  8
#define BRIGHTNESS 255

Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_RGB + NEO_KHZ800);

#define PERCENT_SPAWN 6

struct C{
  byte red;
  byte green;
  byte blue;
};

#define NUM_COLORS 16
C colors[] = {
  {0,0,255},
  {0,255,0},
  {255,0,0},
  {0,255,0},
  {60,240,0},
  {255,255,255},
  {10,40,128},
  {70,140,10},
  {140,70,10},
  {12,96,190},
  {200,10,80},
  {200,80,10},
  {80,10,190},
  {0,0,255},
};

C leds[LED_COUNT];
C ledsIst[LED_COUNT];
int state[LED_COUNT];

void setup() {
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif

  strip.begin();
  strip.show();
  strip.setBrightness(BRIGHTNESS);

  for(int i=0; i<strip.numPixels(); i++) {
    leds[i].red = 0;
    leds[i].blue = 0;
    leds[i].green = 0;
  }
}

void clearLED(int i){
  leds[i].red = 0;
  leds[i].blue = 0;
  leds[i].green = 0;
}

bool isOut(int i){
  return leds[i].red == 0 && leds[i].blue == 0 && leds[i].green == 0;
}

void setLED(int i, C c){
  leds[i].red = c.red;
  leds[i].blue = c.blue;
  leds[i].green = c.green;
  state[i] = 1;
}

void dimLED(int i){
  if(state[i] == 0){
    ledsIst[i].red = 0;
    ledsIst[i].green = 0;
    ledsIst[i].blue = 0;
    return;
  }

  if(state[i] == 4){
    ledsIst[i].red = int(leds[i].red);
    ledsIst[i].blue = int(leds[i].blue);
    ledsIst[i].green = int(leds[i].green);
  }else if(state[i] > 4){
    int f = ((state[i]-4)*2);
    ledsIst[i].red = int(leds[i].red / f);
    ledsIst[i].blue = int(leds[i].blue / f);
    ledsIst[i].green = int(leds[i].green / f);
  }else if(state[i] < 4){
    int f = ((4-state[i])*2);
    ledsIst[i].red = int(leds[i].red / f);
    ledsIst[i].blue = int(leds[i].blue / f);
    ledsIst[i].green = int(leds[i].green / f);
  }

  state[i]++;
  if(state[i] == 15){
    state[i] = 0;
  }
}

void loop() {
  for(int i=0; i<strip.numPixels(); i++) {
    if( random(0,100) < PERCENT_SPAWN && state[i]==0){
      C col = colors[random(0,NUM_COLORS)];
      setLED(i,col);
    }
    dimLED(i);
  }

  for(int i=0; i<strip.numPixels(); i++) {
    C col = ledsIst[i];
    strip.setPixelColor(i, col.red, col.green, col.blue);
  }

  strip.show();
  delay(70);
}
</code>