⚡ Wiring Each button is connected between a digital pin and GND. Since the code uses INPUT_PULLUP, no external resistor is needed for the buttons. Each LED is connected so that the positive leg (anode ...

Toggle Switch LED project essentially setting up the circuit such that there is an LED and a button and a resistor. Then coding it so that every button press turns off or on the LED. This was made as ...

The security flaws on this common hotel keycard lock are nothing short of face-palmingly stupid. Look closely at the picture above. This is a hotel room door swinging open. The device he holds in h… ...