// Nano with 20mA analog meters on pins 5 & 6 as PWM, pin 3 Hall Sensor on knife swtich, pin 12 LED output

unsigned long nextmeter;

void setup() {pinMode(3,INPUT_PULLUP);pinMode(12,OUTPUT);
              for (int i=1;i<15;i++){if (i%2) {digitalWrite(12,HIGH);}else{digitalWrite(12,LOW);}delay(200);}
              nextmeter=millis()+500;}
              
void loop()  {
     if(millis()>nextmeter){analogWrite(5,random(50)); analogWrite(6,random(50)); nextmeter=millis()+random(500);}
     if(digitalRead(3)){digitalWrite(12,HIGH);}else{digitalWrite(12,LOW);}}