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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 04 Sep 2006 (Monday) 15:29
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DIY high-speed flash sync trigger

 
fivefish
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Location: State of Confusion
     
Sep 04, 2006 15:29 |  #1

I'm building a high-speed flash trigger activated by sound... here are some pics.

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For my version 1, I am using an electret microphone powered by 9V battery.This will be fed to an external amplifier, and the output of the amp will be connected to an SCR. The SCR will control the firing of the camera or flash.

On a future version 2, I'll build a small amplifier and put it in the same box.

On my version 1 box, I can use other types of sensor like a PZM mic, or photocell. For now, I'm using an external monitor as my amplifier.

I've tested the operation successfully (on a breadboard), but haven't taken any high-speed shots yet.

Save money! Check out my DIY projects (external link)!
Canon EOS 30D, Canon Digital Rebel
Canon 10-22mm EFS, 70-200mm f4L, 24-105 f4L IS
Canon 50mm f1.8 EF, Canon 75-300mm EF lens
Sigma 150mm Macro, Canon 380EX Flash
DIY High-Speed Sound-activated Flash Trigger and Nikon SB-26 Flash

  
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fivefish
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Sep 04, 2006 15:33 |  #2

UPDATE::

I hooked up a Nikon SB-26 flash to my DIY project. I'm using the flash's external PC jack to hook it up. (Since I don't have a PC jack, I jury-rigged one using alligator clips and jumper wires.)

I set the mic's sensitivity... adjust the flash to 1/64th power... adjusted the mic volume and headphone volume so it's very sensitive....

When the mic picked up the sound of me pressing the shutter, it flashed. (actually, it flashed first when my chair squeaked.)

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In real world use, you would be in a darkened room, with the camera set to BULB setting on a tripod.... when the sound is picked up (say a drop of water, balloon pop, gun shots, etc), the flash will fire automatically.

If anybody is interested, I'll post the circuit/plans. No PCB required. I just used point-to-point wiring since the circuit is so simple.

It should cost $10 or even less if you already have the case, wires, jack etc...

Save money! Check out my DIY projects (external link)!
Canon EOS 30D, Canon Digital Rebel
Canon 10-22mm EFS, 70-200mm f4L, 24-105 f4L IS
Canon 50mm f1.8 EF, Canon 75-300mm EF lens
Sigma 150mm Macro, Canon 380EX Flash
DIY High-Speed Sound-activated Flash Trigger and Nikon SB-26 Flash

  
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fivefish
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Location: State of Confusion
     
Sep 04, 2006 17:40 |  #3

DIY mic for the sound-activated flash trigger.

Using an Electret mic capsule, an empty ballpoint pen, and some tape...

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This device is pretty sensitive and directional.

Save money! Check out my DIY projects (external link)!
Canon EOS 30D, Canon Digital Rebel
Canon 10-22mm EFS, 70-200mm f4L, 24-105 f4L IS
Canon 50mm f1.8 EF, Canon 75-300mm EF lens
Sigma 150mm Macro, Canon 380EX Flash
DIY High-Speed Sound-activated Flash Trigger and Nikon SB-26 Flash

  
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picturecrazy
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Sep 04, 2006 18:06 as a reply to  @ fivefish's post |  #4

Wow, that is nice! Let's see some of the shots you've captured with it.
I am a geek so I love projects like this.


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fivefish
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Sep 04, 2006 22:46 |  #5

okay... I did a quick setup to test the project in actual use. After 22 test shots, I got a few nice ones.

First... here's my setup.

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The microphone is situated at the edge of the bowl so I don't have to turn the sensitivity too high. Otherwise, I'm picking up the sound of footsteps, TV, washing machine, etc...

And the sample shots...

I call this "The Alien"
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This was a nice one but the drops weren't centered. It's hard to control a drinking straw, and remote release at BULB setting at the same time.
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Centered-shot, but not too exciting.
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Nice one, a little better.
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A water drop just hitting the water in it's first millisecond.
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Notice the cavitation at the bottom of the bowl...
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A very nice drop, you can see the wall clearly and the rebound... but the shot is not perfectly centered.
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Save money! Check out my DIY projects (external link)!
Canon EOS 30D, Canon Digital Rebel
Canon 10-22mm EFS, 70-200mm f4L, 24-105 f4L IS
Canon 50mm f1.8 EF, Canon 75-300mm EF lens
Sigma 150mm Macro, Canon 380EX Flash
DIY High-Speed Sound-activated Flash Trigger and Nikon SB-26 Flash

  
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Titus213
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Sep 05, 2006 01:54 |  #6

Exactly where I was trying to go. Thanks for the post, neat pictures.


Dave
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Visit NorwoodPhotos.comexternal link

  
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A01
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Location: Sydney
     
Sep 05, 2006 03:43 |  #7

Great post there fivefish! Shots like this have interested me for a while but ive never seen how they are done :)


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JamOne
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Sep 06, 2006 03:42 |  #8

post it up :) thats amazing! would love to try this!


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TeeJay
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Sep 06, 2006 03:49 |  #9

Love the "L" stripe - could do with being a tad narrower though.


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sm1rf
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Sep 06, 2006 03:55 |  #10

great results what lens are you using?


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fivefish
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Senior Member
545 posts
Joined Jul 2006
Location: State of Confusion
     
Sep 06, 2006 07:37 |  #11

Sigma 150 Macro for the water droplets.


Save money! Check out my DIY projects (external link)!
Canon EOS 30D, Canon Digital Rebel
Canon 10-22mm EFS, 70-200mm f4L, 24-105 f4L IS
Canon 50mm f1.8 EF, Canon 75-300mm EF lens
Sigma 150mm Macro, Canon 380EX Flash
DIY High-Speed Sound-activated Flash Trigger and Nikon SB-26 Flash

  
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fruitfly57
Hatchling
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Sep 17, 2006 18:46 |  #12

i'd really like to see the plans for this!




  
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jwkramer
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Oct 26, 2006 09:11 |  #13

check out this site:
http://www.hiviz.com/i​ndex.html (external link)

they sell kits for $18.


-Jim
Please Visit My Website! (external link)
I'm no Einstein, but I do own 3 of them...

  
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jwkramer
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Oct 26, 2006 09:12 |  #14

this is the kit:
http://www.hiviz.com/k​its/sk2-du.htm (external link)


-Jim
Please Visit My Website! (external link)
I'm no Einstein, but I do own 3 of them...

  
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StealthLude
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Jan 02, 2007 03:07 |  #15

Awsome, just awsome.


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DIY high-speed flash sync trigger
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