The Alarm System is made using Raspberry Pi 3. It has two states "active" and "inactive". It detects nearby objects by a Ultransonic sensor and makes sound from a buzzer when it is in its "active" state, which is enabled by a passcode entered through a keypad by the user in "inactive" state. Rentering the same password in the "active" state causes the system to deactivate and go into "inactive" state.
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View Code? Open in Web Editor NEWAn Alarm System made using a Raspberry Pi by connecting it with a keypad, buzzer, sensor and a LED