Hi , All
The attached code is my attempt to include a pot to vary the rate of blink.
The aim was to control the rate between 1Hz and 20Hz.
The code produced a swing between 1Hz and 4.2 KHz ??
Checked hardware connections , all seemed OK.
Any thoughts?
The attached code is my attempt to include a pot to vary the rate of blink.
The aim was to control the rate between 1Hz and 20Hz.
The code produced a swing between 1Hz and 4.2 KHz ??
Checked hardware connections , all seemed OK.
Any thoughts?
Code:
// constants won't change. Used here to set a pin number :
const int ledPin = 11; // the number of the LED pin
const int Potpin = A1;
// Variables will change :
int ledState = LOW; // ledState used to set the LED
// Generally, you should use "unsigned long" for variables that hold time
// The value will quickly become too large for an int to store
unsigned long previousMillis = 0; // will store last time LED was updated
// constants won't change :
const long interval = 1000; // interval at which to blink (milliseconds)
void setup() {
// set the digital pin as output:
pinMode(ledPin, OUTPUT);
}
void loop() {
// here is where you'd put code that needs to be running all the time.
// check to see if it's time to blink the LED; that is, if the
// difference between the current time and last time you blinked
// the LED is bigger than the interval at which you want to
// blink the LED.
// read the input on analog pin A1:
int interval = analogRead(A1); //this bit added to control
int Potpin = map (A1, 0, 1023, 500 , 25); //rate of LED
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
// save the last time you blinked the LED
previousMillis = currentMillis;
// if the LED is off turn it on and vice-versa:
if (ledState == LOW) {
ledState = HIGH;
} else {
ledState = LOW;
}
// set the LED with the ledState of the variable:
digitalWrite(ledPin, ledState);
}
}
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