# Laser Alarm — BOM

| Item | Quantity | Status |
| --- | ---: | --- |
| Arduino UNO | 1 | Required |
| Low-power laser emitter module | 1 | Required |
| LDR / light sensor | 1 | Required |
| Red LED | 1 | Required |
| Green LED | 1 | Required |
| Piezo buzzer | 1 | Required |
| Push-button | 1 | Required |
| 220 Ω resistors | 2 | Required |
| 10 kΩ resistor | 1 | Required |
| Breadboard | 1 | Required |
| Jumper wires | as needed | Required |
| USB cable | 1 | Required |

No commercial links or supplier claims are included. A kit purchase button remains disabled until a real catalogue integration exists.