hey it's me Destin it is late the kids
are in bed so it's time to work on the
next project so this time around we're
going to start trying to take photos of
stuff being hit by bullets I think that
moment that they're hit by bullets is
called high-speed photography not like
high-speed video like you've seen on TV
but it's really within the reach of most
people they just don't realize it
it doesn't take a lot of insanely
special equipment just it's all timing
so what we're going to do is I've got a
flash unit here this is a a real nice
flash that my mom gave me for Christmas
she gives the best presents ever but all
we're going to do is we're going to
create a circuit or actually just put
one together that's already created for
us to flash this at the exact time we
want to it's really not that not that
hard what I've got is a breadboard
circuit that I bought just off the
internet I bought this one from high
viscom HIV eyes EECOM and I have what's
called the the multi trigger it can
trigger things either on sound which I'm
going to use for my rifle shot or you
can do photo gates things like that so
several different inputs and then it'll
put a delay on it you can you know put
twenty milliseconds let's say or two
milliseconds whatever delay you need you
can put on after the rifle shot so that
the flash will go off right when the
bullet hits the target it's pretty cool
but it's not that hard so what I'm going
to do is I'm going to show you how long
it takes to put together this circuit
I've got a let's go engineer buddy - put
it together for me already but it's not
got a lot of mechanical integrity right
now so I'm going to take his circuit
back apart and put it back together so
that's a little tighter but you know
sorry sterling you did a great job I
promise this is what time it is now and
what's it whatever so we will see how
long it takes me to take this part put a
bit together
[Music]
okay I'm done it is now this o'clock
whatever time that is one comment off
and get on my videos as man seems like
you sure have a lot of free time I don't
I just don't sleep so what we built so
we have a circuit on a breadboard and
connected to the circuit is at piezo
transducer which is sensitive to sound
so the way this particular circuit works
is I'll turn my flash on here and any
sharp sound will initiate a flash just
like that so you can adjust the
sensitivity and the reset time and
things like that you can even put a
delay from the point of the sharp sound
until you want the flash to fire you can
input a delay time via a couple of
potentiometers as a course and a fine
potentiometer that you can adjust down
and get whatever flash that you want
it's kind of fun how I do that connect
the flash to the circuit via what's
called a PC connector it's not personal
computer it's actually prompt or comp or
which is a couple of flash companies
from back in the 50s that standardized
the connection to synchronize flashes to
cameras over in the UK and Germany so
what do you do with this you can do
several things let's say that you wanted
to oh I'm going to take a picture of a
bottle breaking which is really hard to
do if timing right so you can get said
bottle and you can turn all the lights
out open the shutter drop the bottle and
when the bottle hits the ground you get
a flash and that flash will expose the
shutter excuse me expose the chip on
your DSLR and you get a really cool
photo it's pretty neat another thing you
can do is you can vary the output on
your flash this particular flash that I
have has a built-in exposure
compensation so it'll quench the flash
there's a gentleman named Andrew that
taught me how to do this really really
cool
this particular flash the minimum power
output it'll do is 121 128 of a full
output flash and I hooked it up to an
oscilloscope and that is
is about 160 microseconds duration which
is very very short so you can achieve
shutter speeds much faster than anything
your mechanical shutter on your your
camera can do which is awesome the world
was created with physical laws and we
are put here on this earth and we have
an opportunity to explore the world
explore creation within those physical
laws all the answers are already there
we just got to find them
so that's what I like doing so that's it
anyway have a good night
or whatever