First off, I must thank sciguy for helping me on the code.
This is a cimple bit of code that allows a pot to control an led's flash speed. Here is the code for it:
int potpin = 0; // analog pin used to connect the potentiometer
int ledpin = 13;
int val; // variable to read the value from the analog pin
void setup()
{
pinMode(ledpin, OUTPUT);
}
void loop()
{
val = analogRead(potpin); // reads the value of the potentiometer (value between 0 and 1023)
val = map(val, 0, 1023, 500, 5); // scale it to use it with the servo (value between 0 and 180)
digitalWrite(ledpin, HIGH);
delay(val); // waits for the servo to get there
digitalWrite(ledpin, LOW);
delay(val);
}
And if you couldnt tell, the code is a modified copy of the knob servo code. That is the reason for the random describing side notes... i was to lazy to finish or delete them.
You could throw in another val = analogRead(potpin) and val = map(val, 0,1023, 500, 5); right after it sets the LED pin high, that way the delay is now based on the new value. I guess you could add it in again after the LED pin is set low if you wanted even more precision.
Try reading the actual value of potentiometer in a loop. Something like this:
int potpin = 0;
int ledpin = 13;
int val;
int lastChange; // the time of changing pin state
void setup()
{
pinMode(ledpin, OUTPUT);
val = map(analogRead(potpin), 0, 1023, 500, 5); // actual value
}
void loop()
{
digitalWrite(ledpin, HIGH);
lastChange = millis(); // ledpin state changed NOW
while(lastChange + val <= millis()) // loop while there's time for it :)
{
val = map(analogRead(potpin), 0, 1023, 500, 5); // read the value every time
}
// the same here:
digitalWrite(ledpin, LOW);
lastChange = millis();
while(lastChange + val <= millis())
{
val = map(analogRead(potpin), 0, 1023, 500, 5);
}
}
I didn't check it, I don't have the access to IDE right now, but maybe it will work
This is a slightly simplified version of WRonX's example. I haven't actually tested it.
int potpin = 0;
int ledpin = 13;
int val;
int lastChange; // the time of changing pin state
int state = HIGH;
void setup()
{
pinMode(ledpin, OUTPUT);
lastChange = millis(); // ledpin state changed NOW
digitalWrite(ledpin, state);
}
void loop()
{
val = map(analogRead(potpin), 0, 1023, 500, 5); // read the value every time
if (lastChange + val <= millis())
{
state = !state; // invert led's state
lastChange = millis(); // ledpin state changed NOW
digitalWrite(ledpin, state);
}
// you can add other functionality here ...
}
