...When press the reset button on the ICStation MEGA board, the buzzer stops alarming, the DIP LED lights again and this system continues monitoring.
Components list:
1.1× ICStation ATMEGA2560 Mega2560 R3 Board Compatible Arduino
http://www.icstation.com/product_info.php?products_id=3517
2.1×USB Cable A-B Male to Female USB A to UAB B 3m for Arduino
3.1×1K ohm 1/4W 1% Accuracy Metal Film Resistor
4.1×5mm Infrared Emitting LED
5. 1×5mm Infrared Receiving LED
6. 1×Active Buzzer Module for Arduino
7.1×5mm DIP Round White Red Superbright Bulb Light LED
8. 1×5V power supply
9.1× 830 Point Solderless PCB Bread Board MB-102 Test DIY