there’s no charge for this electricity
in this project we’re making a 40 watt
hand crank generator from these common
household items
[Music]
for this project let’s see if we can
make an emergency cell phone charger out
of a cordless drill I have a USB charger
that charges this phone from a USB port
we don’t really need the USB head so
let’s go ahead and cut that off then use
some wire strippers to remove this outer
layer the shielding can be pulled back
revealing the four wires inside I’ve
done this to both ends of the cable and
strip the plastic from the ends of the
wires most phone batteries need around 5
volts to charge now we can confirm that
by plugging the USB head into the port
and attaching some alligator clips to
the red and black wires using a
multimeter you can see just over 5 volts
of direct current with the phone in
series the circuit is completed when
these wires touch and the phone senses
power and lights up this little black
plug symbol shows that it’s charging and
it only appears when the phone gets
around 5 volts ok let’s build our
makeshift
phone charger I have a cordless drill I
think I can convert into an electrical
generator by running it backwards I’ll
remove the bit take the battery out and
looking up into the handle you can see
the two terminals where the battery
would connect for testing I’ll attach
alligator clips to both of them and then
connect the leads to my multimeter when
I pull the trigger and twist the
rotating end of the drill I’m generating
around 5 volts and that’s what we need
to make this into an emergency cell
phone charger let’s round up a piece of
scrap 2×4
a wooden fork a ball of yarn a mixing
beater a roll of tape and some aluminum
foil the first thing we’ll need to do is
secure the trigger in the on position it
won’t work unless this button is fully
pressed so let’s use plenty of yarn to
secure that then fasten the drill to the
2×4 with as many wraps as it takes to
hold it tight the mixing beater gets
inserted into the drill chuck and when
it’s fastened in tight we can double
check there’s no slack when it rotates
we’ll need the torque setting to be at
its highest and confirm the drill is set
to reverse now it’s time to rig the
electrical system let’s rip this sheet
of aluminum foil in two strips then fold
into makeshift wires you can use copper
wire if you have it but aluminum is
still a good conductor and this foil
will work in a pinch these ends are
being rolled to a point and these other
ends fold it over to make them a little
thicker now the flat ends can be held in
place under the terminal clips of the
drill and since we made these wires so
long let’s use the extra length to make
sure they are well separated because
they’ll short out if they touch a little
tape will hold those temporarily until
we can add some yarn to fasten them in
place the red and black wires are
stripped down about an inch and for this
phone we don’t need these wires at all
so one cut and they’re gone now the red
and black wires are attached to the
aluminum leads respecting the polarity
of the drill in this case rhetta’s are
positive and the black is are negative
the wires are secured with some more
yarn and all we need now is some
leverage for our crank handle my wife
salad fork will work and now that we’ve
got our handle I’m thinking this is
ready for a test
I’ll start cranking to see what happens
and look at that the phone lit right up
it’s showing the little plug symbol so
we know this is charging and if I stop
the symbol goes away it looks like it’s
working great so I’m going to take this
inside and clamp it down to a table for
better leverage the crank handle gets
inserted and the system is powered up
the charging symbol is flashing which
means I need to crank just a little bit
faster for stable power and there it is
I’m cranking this at about 100 rpm to
develop the 5 volts this phone needs to
charge if I crank slower the phone won’t
power up and if I crank too fast I risk
damaging it just for the challenge I’m
going to see how long it takes to
recharge this battery from a completely
discharged condition it seems to be
taking quite a while when I think about
it it takes quite a while even when it’s
plugged in with a charger I’m coming up
on three hours and I just saw the
charging symbol flash off that means
this battery isn’t accepting any more
charge it’s done I can disconnect the
charger cable and this phone is fully
ready to go if this electrical generator
will charge a phone I’m wondering if it
will recharge a battery I’ve added metal
magnets to the ends of a rechargeable
double-a battery so that my alligator
clips will attach easily by attaching
the same wire to both ends
we’ve shorted it out and the charge is
being drained as quickly as possible and
I can feel the battery getting hot
this battery is completely dead now so
to revive it I’m adding these lead wires
in parallel with the system and
connecting them to their respective
terminals it takes about 15 minutes of
cranking and it’s harder to turn the
handle this time because I’m pushing a
larger electrical current into the
battery alright it’s done and a quick
test on the meter shows that the battery
is fully charged
well that was educational I tried
shorting the system out on my meter you
got about 6 volts at 7 amps that’s over
40 watts of power I also tried hooking
up an incandescent flashlight bulb and
got it to fully illuminate a white LED
was also tested and it was so bright it
actually hurt my eyes to watch well
there’s a makeshift electrical generator
that you can make in a pinch that will
charge batteries illuminate lights and
generate around 40 watts on human power
and it’s free that’s it for now if you
liked this project perhaps you’ll like
some of my others check them out at the
king of random calm
[Music]
in this project we’re making a 40 watt
hand crank generator from these common
household items
[Music]
for this project let’s see if we can
make an emergency cell phone charger out
of a cordless drill I have a USB charger
that charges this phone from a USB port
we don’t really need the USB head so
let’s go ahead and cut that off then use
some wire strippers to remove this outer
layer the shielding can be pulled back
revealing the four wires inside I’ve
done this to both ends of the cable and
strip the plastic from the ends of the
wires most phone batteries need around 5
volts to charge now we can confirm that
by plugging the USB head into the port
and attaching some alligator clips to
the red and black wires using a
multimeter you can see just over 5 volts
of direct current with the phone in
series the circuit is completed when
these wires touch and the phone senses
power and lights up this little black
plug symbol shows that it’s charging and
it only appears when the phone gets
around 5 volts ok let’s build our
makeshift
phone charger I have a cordless drill I
think I can convert into an electrical
generator by running it backwards I’ll
remove the bit take the battery out and
looking up into the handle you can see
the two terminals where the battery
would connect for testing I’ll attach
alligator clips to both of them and then
connect the leads to my multimeter when
I pull the trigger and twist the
rotating end of the drill I’m generating
around 5 volts and that’s what we need
to make this into an emergency cell
phone charger let’s round up a piece of
scrap 2×4
a wooden fork a ball of yarn a mixing
beater a roll of tape and some aluminum
foil the first thing we’ll need to do is
secure the trigger in the on position it
won’t work unless this button is fully
pressed so let’s use plenty of yarn to
secure that then fasten the drill to the
2×4 with as many wraps as it takes to
hold it tight the mixing beater gets
inserted into the drill chuck and when
it’s fastened in tight we can double
check there’s no slack when it rotates
we’ll need the torque setting to be at
its highest and confirm the drill is set
to reverse now it’s time to rig the
electrical system let’s rip this sheet
of aluminum foil in two strips then fold
into makeshift wires you can use copper
wire if you have it but aluminum is
still a good conductor and this foil
will work in a pinch these ends are
being rolled to a point and these other
ends fold it over to make them a little
thicker now the flat ends can be held in
place under the terminal clips of the
drill and since we made these wires so
long let’s use the extra length to make
sure they are well separated because
they’ll short out if they touch a little
tape will hold those temporarily until
we can add some yarn to fasten them in
place the red and black wires are
stripped down about an inch and for this
phone we don’t need these wires at all
so one cut and they’re gone now the red
and black wires are attached to the
aluminum leads respecting the polarity
of the drill in this case rhetta’s are
positive and the black is are negative
the wires are secured with some more
yarn and all we need now is some
leverage for our crank handle my wife
salad fork will work and now that we’ve
got our handle I’m thinking this is
ready for a test
I’ll start cranking to see what happens
and look at that the phone lit right up
it’s showing the little plug symbol so
we know this is charging and if I stop
the symbol goes away it looks like it’s
working great so I’m going to take this
inside and clamp it down to a table for
better leverage the crank handle gets
inserted and the system is powered up
the charging symbol is flashing which
means I need to crank just a little bit
faster for stable power and there it is
I’m cranking this at about 100 rpm to
develop the 5 volts this phone needs to
charge if I crank slower the phone won’t
power up and if I crank too fast I risk
damaging it just for the challenge I’m
going to see how long it takes to
recharge this battery from a completely
discharged condition it seems to be
taking quite a while when I think about
it it takes quite a while even when it’s
plugged in with a charger I’m coming up
on three hours and I just saw the
charging symbol flash off that means
this battery isn’t accepting any more
charge it’s done I can disconnect the
charger cable and this phone is fully
ready to go if this electrical generator
will charge a phone I’m wondering if it
will recharge a battery I’ve added metal
magnets to the ends of a rechargeable
double-a battery so that my alligator
clips will attach easily by attaching
the same wire to both ends
we’ve shorted it out and the charge is
being drained as quickly as possible and
I can feel the battery getting hot
this battery is completely dead now so
to revive it I’m adding these lead wires
in parallel with the system and
connecting them to their respective
terminals it takes about 15 minutes of
cranking and it’s harder to turn the
handle this time because I’m pushing a
larger electrical current into the
battery alright it’s done and a quick
test on the meter shows that the battery
is fully charged
well that was educational I tried
shorting the system out on my meter you
got about 6 volts at 7 amps that’s over
40 watts of power I also tried hooking
up an incandescent flashlight bulb and
got it to fully illuminate a white LED
was also tested and it was so bright it
actually hurt my eyes to watch well
there’s a makeshift electrical generator
that you can make in a pinch that will
charge batteries illuminate lights and
generate around 40 watts on human power
and it’s free that’s it for now if you
liked this project perhaps you’ll like
some of my others check them out at the
king of random calm
[Music]
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