The complete Arduino Piano Project can be built on top of a breadboard with some connecting wires. The circuit diagram made using fritzing that shows the breadboard view of the project is shown below ...

The circuit for this project is simple. Internal pull-up resistors are used on each of the button inputs, so aside from the buttons themselves, no additional components (e.g. resistors) are needed.

Assemble the circuit as described above. Upload the Arduino sketch using the Arduino IDE. Power the Arduino using a USB cable or external power. Press each button to control its corresponding LED.

While you hopefully don't need one-button access to 911, a desk-mounted panic button is undoubtedly cool, and it makes for a great DIY Arduino project ...

Running out of GPIO pins? Learn how to connect multiple buttons to just one Arduino pin using clever wiring and resistor techniques. Perfect for compact projects, keyboards, or when using small ...

Arduino is famous for empowering DIY projects, but it’s one of a multitude of choices available these days for prototyping your IoT startup, or, like, text messaging you every time your cat sneezes.