This is a simple method to make a flashlight that will last forever.
It uses a small stepper motor to generate energy and many capacitors for keep it stored for several seconds.
Ps: I'm from Argentina so let me know any grammar mistake.
Step 1: Materials
Most materials are recycled from the trash.
You will need:
- Two LEDs, with their silver led holdres.
- An unipolar stepper motor with its reduction gear.
- One or two broken PC motherboards, to remove the capacitors.
- Two 220 ohm resistors.
- A sheet of cardboard.
- A small piece of plastic.
- Plastic spacers.
- Four rectifier diodes.
- Spray paint.