you’ve probably heard of flashlights
that never need batteries or replacement
bulbs this is too good to be true I
really wanted to know so today I decided
to build my own to start I bought an
economy flashlight for a dollar 49 then
I broke it down to its components after
removing the Parts I didn’t need I cut a
piece of 1-inch PVC pipe and wrapped it
with insulated magnet wire next I found
a rubber bouncy ball and split it in
half to plug the ends of the tube before
sealing off the top I placed inside a
three quarter inch by one inch neodymium
rare-earth magnet I used an open flame
from my barbecue igniter to remove the
coating from the ends of the wires then
I hooked the exposed ends to my
multimeter to test it out I was
surprised that when I shook the tube it
easily generated an alternating current
of over four volts to prevent damage to
the rest of the wire coating I wrapped
some packing tape twice around the tube
this also helped keep the wire in place
and keep the tube snug in the casing
next I drew up a schematic for the
circuit I would need and I went to work
soldering and twisting wires in place I
use a rectifier I found on a junk
circuit board to convert the AC from the
shaker directly to DC I wired this to a
five and a half volt one farad
electrolytic capacitor that I found on
the same board next I wired a rocker
switch that I hoped would fit in the
pre-existing switch hole and luckily it
did I carefully packed all the
components inside the casing and left
just the two lead wires hanging out for
convenience in changing out future LEDs
i soldered an eight pin IC socket to the
positive and negative lead wires then I
hot glued it to the underside of the
reflector and the fit couldn’t have been
better
to finish up I inserted a 10 millimeter
white LED that I got at RadioShack for
about three dollars I screwed the cap
back on and done my very own shake
flashlight I
tested it out and was amazed at the
results not only was the light bright
but for just 30 seconds of shaking I
could use my light for over 10 minutes
well I guess that answers the question
that yes you can run a flashlight
without batteries as long as you’re
willing to get a workout at the same
time that’s another item for my
emergency kit and it was a lot of fun to
make I hope you’ve enjoyed watching this
video as much as I’ve enjoyed making it
thanks for watching
that never need batteries or replacement
bulbs this is too good to be true I
really wanted to know so today I decided
to build my own to start I bought an
economy flashlight for a dollar 49 then
I broke it down to its components after
removing the Parts I didn’t need I cut a
piece of 1-inch PVC pipe and wrapped it
with insulated magnet wire next I found
a rubber bouncy ball and split it in
half to plug the ends of the tube before
sealing off the top I placed inside a
three quarter inch by one inch neodymium
rare-earth magnet I used an open flame
from my barbecue igniter to remove the
coating from the ends of the wires then
I hooked the exposed ends to my
multimeter to test it out I was
surprised that when I shook the tube it
easily generated an alternating current
of over four volts to prevent damage to
the rest of the wire coating I wrapped
some packing tape twice around the tube
this also helped keep the wire in place
and keep the tube snug in the casing
next I drew up a schematic for the
circuit I would need and I went to work
soldering and twisting wires in place I
use a rectifier I found on a junk
circuit board to convert the AC from the
shaker directly to DC I wired this to a
five and a half volt one farad
electrolytic capacitor that I found on
the same board next I wired a rocker
switch that I hoped would fit in the
pre-existing switch hole and luckily it
did I carefully packed all the
components inside the casing and left
just the two lead wires hanging out for
convenience in changing out future LEDs
i soldered an eight pin IC socket to the
positive and negative lead wires then I
hot glued it to the underside of the
reflector and the fit couldn’t have been
better
to finish up I inserted a 10 millimeter
white LED that I got at RadioShack for
about three dollars I screwed the cap
back on and done my very own shake
flashlight I
tested it out and was amazed at the
results not only was the light bright
but for just 30 seconds of shaking I
could use my light for over 10 minutes
well I guess that answers the question
that yes you can run a flashlight
without batteries as long as you’re
willing to get a workout at the same
time that’s another item for my
emergency kit and it was a lot of fun to
make I hope you’ve enjoyed watching this
video as much as I’ve enjoyed making it
thanks for watching
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