1. const int analogPin = 0;
  2.  
  3. void setup() {
  4. Serial.begin(9600);
  5. }
  6.  
  7. void loop() {
  8. int mn = 1024; // mn only decreases
  9. int mx = 0; // mx only increases
  10.  
  11. // Perform 1000 reads. Update mn and mx for each one.
  12. for (int i = 0; i < 100; ++i) {
  13. int val = analogRead(analogPin);
  14. mn = min(mn, val);
  15. mx = max(mx, val);
  16. }
  17.  
  18. // Send min, max and delta over Serial
  19. Serial.print("m=");
  20. Serial.print(mn);
  21. Serial.print(" M=");
  22. Serial.print(mx);
  23. Serial.print(" D=");
  24. Serial.print(mx-mn);
  25. Serial.println();
  26. if((mx-mn) > 15) digitalWrite(2, HIGH);
  27. else digitalWrite(2, LOW);
  28.  
  29. if((mx-mn) > 25) digitalWrite(3, HIGH);
  30. else digitalWrite(3, LOW);
  31.  
  32. if((mx-mn) > 40) digitalWrite(4, HIGH);
  33. else digitalWrite(4, LOW);
  34.  
  35. if((mx-mn) > 100) digitalWrite(5, HIGH);
  36. else digitalWrite(5, LOW);
  37.  
  38. if((mx-mn) > 120) digitalWrite(6, HIGH);
  39. else digitalWrite(6, LOW);
  40.  
  41. if((mx-mn) > 200) {digitalWrite(7, HIGH);
  42. digitalWrite(8, HIGH);
  43. digitalWrite(9, HIGH);
  44. digitalWrite(10, HIGH);
  45. delay(1000);
  46. digitalWrite(8, LOW);
  47. digitalWrite(9, LOW);
  48. digitalWrite(10, LOW);
  49. digitalWrite(7, LOW);
  50. }
  51.  
  52.  
  53. }