CODEWITHSUNDEEP
arduino
Tomtortoise
Tomtortoise

Reputation: 33

Arduino code not working

My plan is to make an adjustable speed strobe. I'm just learning to code and this is what I have so far.

int potentiometer_pin = A0;
int led_pin = 7;
int on_time = 100;
int analog_value_multiplier = 15;
int strobe_delay = 0;
int minimum_delay = 500;
void setup() {
  pinMode(led_pin, OUTPUT);
}
void loop() {
  strobe_delay = minimum_delay + analogRead(potentiometer_pin) * analog_value_multiplier;
  digitalWrite(led_pin, HIGH);
  delayMicroseconds(on_time);
  digitalWrite(led_pin, LOW);
  delayMicroseconds(strobe_delay - on_time);
}

I have the LED + on digital 7 with a 220ohm resistor and the pot on analog 0, it is a 10K pot with one side hooked up to 5v+ and the other to ground. My problem is that the LED stays on and turning the pot just changes the brightness. Any help on what to do - not just a new code but what to do? I want to actually learn how to fix this.

Upvotes: 2

Views: 713

Answers (2)

madmik3
madmik3

Reputation: 6983

like david said, but I will add I think you want delay not delayMicroseconds.

http://arduino.cc/en/Reference/delay

Upvotes: 4

David Schwartz
David Schwartz

Reputation: 182829

Your speeds are all WAY too fast. Multiply all your delays by about 100. You've made a pulse width modulator.

Upvotes: 3

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