➢Step descriptions:

✦Step 1:-Prepare these materials below:

13005 transistor (from cfl circuit), any power transistor will work.

1N4007 diode.

10nf 2KV capacitor, any 2KV capacitor will work.

1K resistor.

12-0-12 step down transformer.

✦Step 2:-Here is the circuit diagram.

✦Step 3:-Connecting the 1K resistor to the Base.

✦Step 4:-Connecting 11 diodes in series.

✦Step 5:-Connect all capacitors as in the circuit diagram.

✦Step 6:-Connect the 3.7v battery and test it.

Product list:

『Step-down transformer』

『11x10nf capacitor』 view more ⇒https://www.utsource.net/itm/p/8689000.html

『11x1N4007 diode』 view more ⇒https://www.utsource.net/itm/p/8035986.html

『1K resistor』 view more ⇒https://www.utsource.net/itm/p/6479527.html

『13005 transistor』 view more ⇒https://www.utsource.net/itm/p/8039008.html

Video on Youtube: