#Arduino analog how to

As you can see, if we gave the command analogWrite(mypin, 127), we would get about 2.5 volts applied to mypin. If we issued the command analogWrite(mypin,255), it would appy 5 volts to the pin. If we issued the command analogWrite(mypin,0), it would apply 0 volts to mypin. We must give it an integer between 0 and 255. Unfortunately, the arguments for the analogWrite command are not as simple as telling it a number between 0 and 5. To output an arbitrary voltage between 0 and 5, would issue the arduino an analogWrite command. That is, we want to apply any voltage we want, not just 0 or 5. In the world of engineering and electronics, we say that we want an analog voltage. These are pins 3,5,6,9,10,11 on the arduino uno. The arduino pins with the squiggly line by them are able to write these in between voltages. We would maybe want a voltage of 2.3 volts. The truth is that most times we want something in the middle.

That is, when we digitalWrite HIGH or LOW to the pins, we are either turning on the full 5 volts or turning it all the way off. The thing is, so far all of our commands to the arduino pins have in effect been to either turn the pin On or turn it Off. We are well on our way to building some really powerful projects.

#Arduino analog how to

We have learned how to control commands with both for loops and while loops. We have learned how to get input from the user, and how to send information to the user. We have done some pretty cool stuff so far with the arduino.