The joystick shown in Figure 10-2 is basically two potentiometers and a button that allow ... signal wires directly to Arduino pin 9, and the other servo’s signal wire directly to Arduino ...

You can change where the IDE stores sketches from here by clicking the Browse button ... Arduino to use the actual built-in LED on the Arduino circuit board itself. If you connect a jumper wire to ...

But if you just want to add in some buttons without reaching for an extra IC you’ll love this hack. [John Boxall] shows how to add four buttons using one ADC pin. The concept is nothing new.

The first obstacle for [Ronnied] was to figure out the wiring ... wheel buttons, the Arduino would have to keep the pins as inputs until a steering wheel button was pushed, the pin changed ...