What’s the code in this sketch? Here’s the code for the ATG5_Button sketch. We’ll step through the details over the next few pages. (We’ve removed the code’s starting comments for the sake of brevity.) Initializing our code and variables ATG5_Button is different from our ATG3_Blink sketch in that there is code that happens before the […]
Read More →The ATG5_Button sketch’s loop Now that we understand what digital inputs do, let’s take a look at the ATG5_Button sketch’s loop code. First, let’s look at the line at the top of the code. Exploring the loop In the first line of the ATG5_Button sketch’s loop section (after the void loop() { bit and the […]
Read More →Adding a speaker In this circuit, the button, LED, resistors and jumpers will stay in the same place. We are simply adding a speaker; everything else remains the same. Part to add: 1 speaker As always, before you attach the speaker, make sure your computer is not connected to the Arduino. Attach one end of […]
Read More →Adding a second button We are going to add another button to our circuit so we can play a 2 note tune on our mini-keyboard instrument. We will need another button, another 10 K ohm resistor and more jumpers. Remember to unplug your Arduino from your computer before you add to the circuit. Parts to […]
Read More →Reviewing code concepts We learned a few new, and very important, programming concepts in this chapter. These concepts are critical to writing code in all programming languages, though the details might be a little different than in the Arduino language. Let’s look once more at variables and conditionals. variables A variable is a container in […]
Read More →Blink the LED We’ll start programming the Arduino! In this chapter, we are going to start to see how the Arduino controls electronics with the programs that we write. First we’ll set up the software to program the Arduino on a computer, then we’ll connect your Arduino to a breadboard. We’ll build an SOS signal […]
Read More →SOS signal light: creating more complex timing While the previous circuit ended up being very similar to the project in chapter 2, we have accomplished something by now hooking it up to Arduino and the possibilities of code. Earlier in this chapter, we saw that we can make one light blink on and off with […]
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