Quantity   Component name
1 × Arduino Uno
1 × 12 V Relay
1 × 51 kOhm Resistor
1 × 330 Ohm Resistor
1 × 2N3904 NPN Transistor
1 × 2N4001 Diode
1 × 4x4 Keypad
1 × Buzzer
1 × Jumper Wires
1 × Jewelry Box (case)