capacitive sensor

Other Hardware Sensors
1

I'm trying to get my capacitive sensor to turn the brightness of an LED up and down. It is giving me the correct output 0-255 because I have debugged it.

when I set:

analogWrite(lightPin, newVal);

to:
analogWrite(lightPin, 128);

it gives it about half brightness, which is correct. So I am very confused why the variable wont translate to brightness. any ideas?

#include <CapSense.h>

CapSense cSensor(4,2);


int lightPin = 13;
int buttonPin = 3;  

void setup() {
  
    Serial.begin(9600);
    pinMode(lightPin, OUTPUT);
    pinMode(buttonPin, INPUT);
}

void loop() {

    int val = digitalRead(buttonPin);
    long sensor = cSensor.capSense(30);

    long newVal = (sensor/1000)*20;
    Serial.print(newVal);
    Serial.print(", ");
      analogWrite(lightPin, newVal);    
    if (newVal < 255 && newVal > 20 && val == 0 ) {

    } else {
      digitalWrite(lightPin, LOW);  // turn LED OFF
    }
}

there is also a button too in case you're wondering, and yes it is on :slight_smile:

2

Try using one of the pins that supports analogWrite.

3

try it without the if, it can set the LED allways off (too fast to see)

void loop() {

    int val = digitalRead(buttonPin);
    long sensor = cSensor.capSense(30);

    long newVal = (sensor/1000)*20;
    Serial.print(newVal);
    Serial.print(", ");
      analogWrite(lightPin, newVal);    
}
4

AWOL:
Try using one of the pins that supports analogWrite.

doh. that was it. totally forgot some pins don't support analog signals. thanks.