🔗 Overview 4 push buttons wired to digital pins with internal pull-up. 4 LEDs wired to digital pins with resistors. When you press a button, its corresponding LED lights up. 📐 Circuit Diagram Add ...
Each LED is connected to one of the Arduino's digital output pins through a 220Ω resistor. A push button is connected to each input pin and uses the internal pull-up resistor feature of the Arduino.
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 boards ...
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