1. Some parts needs in this project.
2. Soldering.
3. Finished.
Product list:
9v Battery: https://www.utsource.net/itm/p/1899471.html
Soldering Iron: https://www.utsource.net/itm/p/8423764.html
PCB Board: https://www.utsource.net/Home/PCBService
LED: https://www.utsource.net/itm/p/1886498.html
Heat Shrink Tube: https://www.utsource.net/itm/p/6466015.html
BC547/ BC548: https://www.utsource.net/itm/p/382309.html
Resistor: https://www.utsource.net/itm/p/8445573.html
Capacitor: https://www.utsource.net/itm/p/9267199.html
Buzzer: https://www.utsource.net/itm/p/9221609.html
IRFZ44N: https://www.utsource.net/itm/p/981727.html
More details, pls check the video on Youtube: