Let’s make our projects interactive! We’re going to learn how to make our projects interactive, first by adding a button to turn an LED on and off. Then we will attach a speaker to our Arduino, and control sound and light with our sketch. Finally, we’ll add two more buttons, building a keyboard instrument, on […]
Read More →Digital input: add a button We are ready to get our parts together to start building a circuit with a button. You’ll need these parts: 1 LED 1 220 Ohm resistor (red, red, brown, gold) 1 10K Ohm resistor (brown, black, orange, gold) 1 momentary pushbutton switch Jumper wires Breadboard Arduino Uno USB A-B cable […]
Read More →Digital input: what is it again? Let’s say that you’re standing outside a friend’s house looking through the window at a light switch. Your friend calls to ask “Is the light switch on?” Your job is to tell the friend “yes the light switch is on” or “no, the light switch is off.” That’s exactly […]
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 […]
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