Post by pt3r on Nov 14, 2021 11:16:48 GMT
There is a problem with a potmeter connected the analog pin of an arduino. if you read its value using following example:
void setup() {
Serial.begin(9600);
}
void loop(){
int readValue = analogRead(A3);
Serial.println(readValue);
}If you check the read values in the serial monitor you will see that its not a constant value even it you don't move the potmeter.
A solution I like to use is to scale down the read value to the range that is useful for me since most of the times you don't need the range of 0-1023 in your code.
If for example you need values in a range of 0-128 then you can just scale down the read value by dividing the read value by 8.
int readValue = analogRead(A3)/8;or by shifting the bits of the read value 3 positions to the left thus dropping the 3 least significant bytes which equals the whole division by 8.
int readValue = analogRead(A3)>>3; If you run the modified code you will notice that there is significant less jitter on the read values.
