1, Prepare in4004 4pcs, and solder.

2.Prepare 105J 400V,1M ohm and solder them.

3.25v 470uf capacitor,zener diode 12v,led and solder them together.

4. Prepare the paper boards, make a box and paste it in the box.

5. Finished and test.

6 Diagram circuit.

Product list:


105J 400V

1M ohm

25v 470uf capacitor

zener diode 12v


1k ohm

More details, pls check the video on Youtube: