Hi People,

Can somebody tell me how "analogWrite" differ from "DigitalWrite" ? In which circumstances should we pick one of them if it makes too much difference?

Thanks,
Brave_Guy

 

I take it you are talking about Arduino analogWrite?

If so I'll save you the trouble of just Googling it and tell you that they are very different, so just use digitalWrite unless you know that you really need analogWrite. analogWrite sends a pulsed output via the PWM pins and so can be used to dim an LED or passed through a filter to produce a voltage other than the digital high voltage.

 

It would be good if you mentioned that this is for an Arduino, as some may be confused with undefined language such as "digitalWrite".

With that said, the Arduino website helps and is the first result when searching for those exact terms:

• digitalWrite
• analogWrite

As you can see from the documentation, analogWrite is a Pulse-Width Modulated (PWM) signal, where digitalWrite produces a constant HIGH or LOW.

 

Dear tshuck and sirch2,
As you guessed, the question was for Arduino.
I think I understood now.

I take it you are talking about Arduino analogWrite?

If so I'll save you the trouble of just Googling it and tell you that they are very different, so just use digitalWrite unless you know that you really need analogWrite. analogWrite sends a pulsed output via the PWM pins and so can be used to dim an LED or passed through a filter to produce a voltage other than the digital high voltage.

It would be good if you mentioned that this is for an Arduino, as some may be confused with undefined language such as "digitalWrite".

With that said, the Arduino website helps and is the first result when searching for those exact terms:

• digitalWrite
• analogWrite

As you can see from the documentation, analogWrite is a Pulse-Width Modulated (PWM) signal, where digitalWrite produces a constant HIGH or LOW.

 

From my point of view
digitalwrite doesn't offer the chance of playing around with the volts that reach the component, meaning the amount of volts released from the arduino are the exact volts that will reach the component while analogwrite helps you to control the amount of volts reaching the component.