ARDUINO UNO
16X2 LCD DISPLAY
3X4 KEYPAD
ULRASONIC SENSOR
BUZZER
ARDUINO LCD
VCC VCC
GND GND
A5 SCL
A4 SDA
ARDUINO KEYPAD
ROWS->D6 TO D8
COLUMNS->D2 TO D5
ARDUINO ULTRASONIC
VCC VCC
GND GND
D10 TRIG
D11 ECHO
ARDUINO BUZZER
D9 +ve
GND -ve
The system is meant to detect intruders and sound an alarm. The ultranonic sensor is used to detect for the prescence of an obstacle within the vicinity.When an object is detected the buzzer is turned on to sound an alarm. The alarm will stay on until a de-activation key is entered using the keypad. The LCD screen is used to display the current status of the system.