After this tedious step, he designed a PCB that hosts an Arduino Nano to accept input, two MCP23017 GPIO expanders to give it enough outputs, and CD4066BE CMOS switches to trigger the connections.

For more advanced security applications, you might also want to explore our RFID door lock system using Arduino, which shares similar hardware components. At its core, the system offers automatic ...

Create a new folder called "LiquidCrystal_I2C" under the folder named "libraries" in your Arduino sketchbook folder. Create the folder "libraries" in case it does not exist yet. Place all the files in ...

Built an Arduino-based tilt detection system using a pull-up resistor. Programmed two LEDs (green/red) to indicate tilt state based on sensor input. Serial monitor displays real-time status ("TILT" or ...