To build this project, all you need is three main components: an Arduino Uno, a 16x2 LCD, and a push button. You can connect everything to a breadboard to keep it simple.

PIC, AVR, and Arduino are ubiquitous in projects these days and a lot of the time it’s easy to over-complicate things with their use. In this case, [Tod] wanted to use a momentary tactile swi… ...

Powered by an Arduino Uno, ... you'll be using a keypad instead of a simple push button to deactivate the alarm. ... the buzzer's tone switches to a continuous but still equally annoying sound.

After the “call” key (S2) operation, the call can be aborted by depressing the second push button switch S3 – the “end” key. This option can be used to make a “missed call” alert, incase of an ...