Connecting a button
One of the basic interactions you can have with the Arduino is pushing a button, which causes another action. Here, we will see how to connect and use a button.
To keep the example simple, we will connect a button to the Arduino, and whenever we press and hold it, the internal Arduino LED will light up. But first, we need to talk a little about buttons. There are a few common configurations found in everyday electronics. We can categorize buttons/switches based on three main characteristics:
Momentary and maintained buttons
Open or closed buttons
Poles and throws
Momentary buttons are active as long as they are pressed, while maintained buttons keep the state we let them in. Keyboards have momentary buttons while the typical light switch is a maintained button.
Momentary buttons can either be opened or closed. This reflects the connection state when not pressed. A closed momentary switch will conduct current while not pressed and interrupt the current when pressed. An opened...
