You're free to open their circuit, see the sketch used, and run the simulation ... create one to show the project's schematic diagram. Other than Arduino, Wokwi also features popular platforms ...

Just follow the schematic diagram to complete the construction ... with pre-burned Arduino Bootloader Replace the original chip in your Arduino board with this one Now upload the sketch to the 328 ...

As you can see from that sketch and the circuit diagram, the LED is connected to the digital pin 13 of the Arduino. Once you verify (compile) the sketch and upload it to the Arduino board, you should ...

Here is the circuit of an Arduino-based Panic Alarm! The wiring is very simple so that even a novice can construct this interesting circuit without any difficulty. Arduino is a family of ...