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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...
Most materials are recycled from the trash. You will need: Two LEDs, with their silver led holdres. An unipolar stepper motor with its redu...
The key to the lantern is to put capacitors in parallel to be interpreted as one large-capacity capacitor. I use 40 capacitors of 1000uf 10v. If you ...
Draw the box on the cardboard. Trim the excess parts and fold by the lines. Paste a strengthening in the areas where the motor will be attached. Use ...
Paint the cardboard to make it look better and be more resistant to moisture.
Solder the four diodes to the contacts of the individual coils of the motor in the male connector and a small piece of wire to pin cable which connec...
Solder the output of the four diodes to the positive of the capacitors and the wire to the negative. Solder two pieces of wire on the opposite side o...
Cut the plastic about the size of the top. Drill two holes for the led holders and paste. Inset leds, solder two resistors in the positive terminals ...
Use a zip tie to attach the motor to the cardboard box, remember to connet it to the capacitors.
Use a small piece of plastic and hte spacers to make a handle and paste it strongly to the motor gear.
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