Output voltage not stable

[skjermlue]

Hello!
I have a Genuino UNO.
I am having trouble with unstable voltage output when using pin 9.
This is my program

void setup() {

pinMode (9,OUTPUT);

}
void loop() {

analogWrite(9,255);

}

When I am measuring between pin 9 and GND, I am getting 4,85vDC or 5,15vDC, just depends on what time on the day I am measuring... It's not unstable when I'm measuring it, so either 4,85 or 5,15vDC.

I am using my USB cable from my computer, which I'm measuring a stable 5,22vDC.

I've done some tests now, and when I am connecting pin 9 and GND to my 0-10v PWM converter, I am getting even lower voltages.

For example:
When I have 5,15vDC on pin and GND, I am getting 4,85 when I connect them to the converter.

Can anyone help me?

[arduinomega123]

Please make sure your meter/connections/arduino/pwm converter is reliable and not burnt out.
Also try digitalWrite instead of analogWrite.
Thanks.

[missdrew]

    void setup()
 {
    pinMode (9,OUTPUT);
    analogWrite(9,255);
    }
    void loop() {    }

Try this and see if the voltage settles

[skjermlue]

How do I check if my parts are burnt out?
Tried with digitalWrite, still getting 5,15v. Will check later today if it changes again..

[skjermlue]

For now it's the same. But I can check again later..

[arduinomega123]

Try using continuity mode on your multimeter to check your wires.
And feed the usb output to your pwm converter to check if it is fine.
Thanks.