This project offers a straightforward but efficient way to stop unwanted access to a vehicle by notifying the owner promptly as the attempt is detected. An Arduino UNO board, a buzzer, an A7670C LTE ...

If your buzzer is active-HIGH, flip the code flag (see “Configuration”). If you discover your buzzer is 5V-only, power it at 5V and use a small NPN/MOSFET level driver for I/O (ask if you want a tiny ...