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Thread started 09 Dec 2012 (Sunday) 15:01
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DIY Triggers - Pin wiring

 
Trugga
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Dec 09, 2012 15:01 |  #1

30-35 years ago, I was "into" electronics and my Father photography. We combined our skills (ok, his cash and my soldering iron) and came up with the following:

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Sound Operated Trigger

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IR Beam Trigger

If I recall correctly, on the sound operated trigger, a 2.5mm jack pluck was fitted to the unit, with the other end fitting to the PC socked of a flash gun.

Back then (late 70's) Dad was using a Praktica film camera - I recall him opening up the shutter and the sound of a baloon busting from a dart, would trigger the flash. The shutter was then closed.

The IR Beam comprises the two units; a transmitter and receiver, with an invisible IR beam between them. The units have a 1/4" thread in the base which allowed them to be mounted on a short steel spike, pushed into the back yard lawn. I cant recall if (again a 2.5mm jack lead) it triggered a flash gun or the camera (he might of gotten the Canon A1 by now). I fondly recall him setting the beam up to capture a fox visiting the garden - but he only managed to capture the neighbours cat :(

The transmitter has a variable potentiometer fitted and the receiver has a 3-way rotary switch.

The above were recently retrieved from my parents attic and I'd like to see if they can be put to use. I'll need to replace both battery leads and one of the battery holders.

Q's
Would the above be able to trigger the camera (a 7D) direct - which of the 3 pin connections would I use (thats assuning the trigger is a short rather than a voltage) ?

What might the 3-way rotary switch be fore on the IR receiver ?

Hopefully, my Dad will be able to find the copies of the magazines that we made the units from. In the mean time, I would appreciate some pointers on the above (as I gave up electronics for engineering a long time ago).

Regards
Lawrence



  
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DavidR
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Dec 09, 2012 15:59 |  #2

All of the triggers that I have used, the trigger fires the strobe while the camera's shutter is left open in a dark room. The flash duration is what freezes the movement, not the shutter.


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Trugga
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Dec 09, 2012 16:04 as a reply to  @ DavidR's post |  #3

Thats' what I'd of though (as I recall from the sound operated unit).

Not sure on the IR trigger though. Cant imagine the shutter was left open for any length of time with that - waiting for an animal to appear.

Lawrence




  
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Whortleberry
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Dec 09, 2012 17:25 |  #4

Is this what you need? Pop that on the end of an N3 connection-equipped lead from camera and away you go.


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Trugga
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Dec 10, 2012 07:47 as a reply to  @ Whortleberry's post |  #5

I think that migh just do the job :D

I was looking at it the other way round - ie what are the pin-outs at the camera end?

I do have a spare N3 curly lead, and a 2.5mm stereo jack, so I think I'm nearly there.

Oh, also found this at lunch time - might be useful for otheres:

http://www.doc-diy.net/photo/remote_p​inout/ (external link)

Lawrence




  
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DavidR
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Dec 10, 2012 07:53 as a reply to  @ Trugga's post |  #6

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HTTP response: NOT FOUND | MIME changed to 'image/png'

M10 - ZM21 - ZM35

  
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gromeo
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Dec 10, 2012 08:02 |  #7

This may give you some info http://www.tminusprodu​ctions.com/home/custom​triggers.html (external link), this is the device I use for remote setup for the shuttle and the the rocket launches.


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Trugga
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Dec 10, 2012 14:44 as a reply to  @ gromeo's post |  #8

As Professor Farnsworth (Futurama) might say "Good news everybody"...

The sound operated trigger works :D

In my collection of recently purchased accessoris is a wireless/wired remote and the wireless Youngnu flash transiever that come with a lead - the lead is exactly what is needed to connect to the camera:

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So, I put a battery in the sound trigger (the white box above) and it works. OK, so I don't have focus control, but will most likely set up manually anyway.

Just need to wait for ebay to send be a new battery holder and lead for the green boxes (was corroded beyond repair) and I can have another play.

Just need to think of some things to shoot now ;)

The other good bews is that my Dad has found the magazines with the articles (and condtruction details in them) and hopes to drop them off to me later in the week.

Thank your all for your replies above - as it happens, this project was easier than I anticipated.

Cheers
Lawrence



  
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DIY Triggers - Pin wiring
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