Voltage Sensor Arduino project

[jamplang]

Alright Jim, thank you, i am really grateful for you help , i will try and update you later on the progress

[jim-p]

Very good

[jim-p]

I made two mistakes in the formula. Try this code:

void setup() 
{
   Serial.begin(9600);
   pinMode(8, INPUT);
}

void loop() 
{
  unsigned long pulse_width;
  float average, dutycycle;


  pulse_width = pulseIn(8, HIGH, 100000UL);
  if (pulse_width > 16)
  {
    Serial.print("Pulse width  =  ");
    Serial.println(pulse_width);
    dutycycle = pulse_width*490.0/10000.0;
    average = 5.0*dutycycle/100.0;
    
    Serial.print("Average  =  ");
    Serial.println(average, 3);
  }

}

[jamplang]

Hey jim, i tried the code but it doesnt show anything on the serial monitor, i connected Mega D3 to nano D8 and gnd to gnd

[JCA34F]

You can't read the PWM output with analog input because it's pulsating ON an OFF at near 1000 times per second, the analog input will read either 5V or 0V and all you see are meaningless flying numbers. Do you have a 10k resistor and 0.47 to 2.2 uF capacitor?

[TomGeorge]

Hi,
Something like this;
Feel free to edit.

Tom..

[jamplang]

Hi,
No i dont have the extra components

[jamplang]

Hi Tom,
Alright i'll try your schematic, Thanks Tom

[JCA34F]

Yep, thanks for the pitcher picture.

[jim-p]

I made a mistake in the code
I corrected it, see updated code post #24
It will only print out a number if the duty cycle is between 1% and 99.5%