[SOLVED]Led dimmed when used as output with HC-SR04 ultrasonic sensor

hello,

i'm new here.

i made project hc-sr04.

basically, when object close, arduino light red led , if not close, green one.

it work leds aren't glowing should. if connect led directly grd , 5v work fine. (220 ohm resistor).

when output pin dimmed.

i not know can come. ?

thanks in advance.

my code:

code: [select]


int led_r = 6;
int led_g = 8;
int distance, duree;

void setup() {
  serial.begin(9600); // open serial monitor @ 115200 baud see ping results.
  pinmode (trigger_pin, output);
  pinmode (echo_pin, input);
  pinmode (led_r, output);
  pinmode (led_g, output);
  
}

void loop() {
    digitalwrite(led_r, low);
    digitalwrite(led_g, low);
    digitalwrite(trigger_pin, low);
    delaymicroseconds(500);
    digitalwrite(trigger_pin, high);
    delaymicroseconds(10);
    digitalwrite(trigger_pin, low);
    duree = pulsein(echo_pin, high);
    distance = (duree/2) / 29.3;
      if (distance >= 15 || distance <= 0)
        {
        serial.println(" loin \n");
         serial.print("distance= ");
         serial.print(distance);
        digitalwrite(led_g, high);
        }
      else
        {
        serial.println(" cm proche \n");
        serial.print("distance= ");              
        serial.print(distance);        
        digitalwrite(led_r,high);
        }
}


your sketch turning leds off each time loop starts, causing pwm effect dims leds. try qualifying turn off sr04 output setting flag when condition calling led turned on , leave on until condition no longer exists.

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