Quantity   Component name
1 × Arduino Nano R3
1 × HC-05 Bluetooth Module
4 × 1N4007 – High Voltage, High Current Rated Diode
4 × Resistor 220 ohm
2 × Female Header 16 Position 1 Row (0.1")
1 × General Purpose Transistor BC547
1 × JLCPCB's Customized PCB
4 × Screw Terminal
4 × Relay Power Supplies / Uninterruptible Power Supplies (UPS)