Please. I know. It's flux capacitor. But that might happen to every german-syncronized-movie-watching person. Maybe it's because of the drawing that says "flux compression". I still want to know what happened there.

Parts are all 1206 and super easy to solder.

Version 1

Version 1 - Rev 1

Version 1 - Rev 2 - final

I've updated the design to also have a battery holder and a switch (yay), also soldering points for a clip. Checkout #FLUX capacitor trinket for future updates :) ALSO: there's a four led, more resistors version by @Bastiaan - #Mini flux capacitor prop PCB

int outer = 0;
int center = 1;
int inner = 2;
int pwmValue = 22;
int timeLength = 250;
int delayValue = 10;
void setup() {
  // put your setup code here, to run once:
  pinMode(outer, OUTPUT);
  pinMode(center, OUTPUT);
  pinMode(inner,  OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
    softPWM (outer);
    softPWM (center);
    softPWM (inner);
    delay(timeLength);
}
void softPWM (int pin)
{ 
  for (int j=0; j<timeLength/delayValue; j++)
  {
    for (int i=0; i<pwmValue; i++)
    {
      digitalWrite(pin, HIGH);
      delayMicroseconds(delayValue);
    }
    for (int i=pwmValue; i<=255; i++)
    {
      digitalWrite(pin, LOW);
      delayMicroseconds(delayValue);
    }  
  }
}