High Speed Photography
High Speed Photography
High Speed Photography
High Speed Photography
High Speed Photography
With this device youíll be able to:
take pictures from anything you can sense or detect:
- movement
- sound
- Ö
You donít need to modify your camera or flash for this.
Itís compatible with the old High Voltage flashes and the new TTL ones.

Why I did this project?
A friend of me who's really passionate about photography showed me some high speed photography examples. And how expensive the equipment you need is.
I said there must be a DIY solution for that and I started tinkering.
We've done some experiments and you can see the results in the pictures below.
for more pictures from Sanne
see here http://www.flickr.com/people/sannegovaert/

After following this instructable you'll be able to make such pictures too!!

What I would do with the zing
If I win the zing laser cutter then my lab is complete, and will I be able to go crazy.
I'll make: robots, enclosures, front panels, puzzles, build kits, moose heads, etch some cool things
I've been waiting a long time to make this instructable so I could join the zing contest and here I'm

Step 1: Laser Trigger (Light barrier) Sensor

High Speed Photography
High Speed Photography
High Speed Photography
High Speed Photography
The laser trigger exists of 2 pieces:
-the sensor (this step)
-Laser itself (next step)

See the included pictures for the circuits
You'll need:
  • a phototransistor / photodiode
  • just a resistor like 10k

    Step 2: Laser driver

    High Speed Photography
    High Speed Photography
    High Speed Photography
    High Speed Photography
    Calculate the resistor you need with the following formula
    R = 1.25V / Laser Current in A

    You'll need:
  • A led laser diode (ebay)
  • LM317
  • 1 x Resistor or you can skip the driver and just use a resistor placed in series with the laser diode

    Step 3: Build the circuits (Arduino)

    High Speed Photography
    High Speed Photography
    High Speed Photography
    High Speed Photography
    High Speed Photography
    You can connect everything to an arduino
    Or you can make a pcb (see next step) to do the job so you have your arduino free for other projects

    connect your lcd to the arduino see the circuit

    connect the output of the sensor circuit to the analog pin 0

    connect your digital pin 12 to the flash trigger circuit

    connect 4 buttons with a pull down resistor to:
    - pin6 (delay+)
    - pin7 (delay-)
    - pin8 (sens+)
    - pin9 (sens-)


    You can also make a pcb for this i've included the EAGLE files I've used

    High Speed Photography
    Eagle Files phototrigger.zip82 KB

    Step 4: Put everything in a nice enclosure

    High Speed Photography
    High Speed Photography
    High Speed Photography
    High Speed Photography

    Step 5: Upload The Code

    High Speed Photography
    Upload the code to your Arduino
    High Speed Photography
    HighSpeedFlashTrigger.pde2 KB

    Step 6: The set-up

    High Speed Photography
    High Speed Photography
    Use a pipette or a bottle with a hole in the top to make droplets.
    Make sure they cross the laser beam.

    X = the distance between your pipette and the laser beam
    Y = the distance between the laser beam and the surface (in this case a saucer of milk)

    the external flash is connected to the arduino with a pc link cable (ebay)


    Step 7: Some calculations

    High Speed Photography
    Now we want to know how long it takes from when the droplet start falling till it hit the surface.
    U can use this formula (see picture)
    (y*2)/(sqrt(2*x*A)+sqrt(2*A*(x+y)))*1000

    X = the distance between your pipette and the laser beam
    Y = the distance between the laser beam and the surface (in this case a saucer of milk)

    A = Gravitational acceleration
    to find yours just use wolframalpha
    search for: "Gravitational acceleration your country"
    (replace your country)
    http://www.wolframalpha.com/input/?i=Gravitational+acceleration+belgium

    You don't have to make the calculations, because I've made an excel sheet to calculate the time.
    High Speed Photography
    Calculations flash trigger.xls6 KB

    Step 8: Results

    High Speed Photography
    High Speed Photography
    High Speed Photography
    High Speed Photography
    High Speed Photography
    After some experimenting
    this is what we got :D

    Post your results in the comments ;)
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