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Old August 15th, 2011, 11:53 AM   #1
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Run/Stop Cables from Wireless Follow Focus to nanoFlash

Question for the Convergent Design people,

Some background first. A few of us have been attempting to figure out a way to get a run/stop (start/stop) cable going to trigger a Sony F3 from a wireless device; either a Preston or a Bartech. Someone brought up the idea of developing a start/stop cable that could be used with either a Bartech or Preston that would trigger the nanoflash and simply not use the internal recorder on the Sony F3.

Has Convergent Design had a request yet to fashion start/stop cables for the aforementioned devices?

Some links that may be useful during the discussion on the matter...

http://bartechengineering.com/

fSTOP Wireless BarTech Digital Receiver (BDR) - PLC Electronic Solutions Ltd. Store

Preston Cinema Systems

-Andrew
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Old August 15th, 2011, 04:11 PM   #2
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Re: Run/Stop Cables from Wireless Follow Focus to nanoFlash

Dear Andrew,

The nanoFlash has a special Trigger Mode, "Record Level", which greatly simplifies the interface to a wrieless remote controller.

In this mode, as long as the contacts are closed, such as when a relay is used, or when a switch is closed, the nanoFlash will record.

I do not have the schematics for the controllers, but I believe that they can offer a solution.
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Old August 15th, 2011, 06:06 PM   #3
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Re: Run/Stop Cables from Wireless Follow Focus to nanoFlash

Thank you for the reply Dan.

I have attached a screencapture of the pin assignments on the HIROSE connector. Pin # 4 is the Record Start/Stop line. This would be combined with the ground?
Attached Thumbnails
Run/Stop Cables from Wireless Follow Focus to nanoFlash-remote_hirose_pin-diagram.png  
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Old August 15th, 2011, 06:15 PM   #4
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Re: Run/Stop Cables from Wireless Follow Focus to nanoFlash

Dear Andrew,

Yes, Pin 4 to Ground, either Pin 7 or Pin 8 will activate our Start/Stop circuit.

If you are in Trigger|Remote or Trigger Remote and Record, then

1. Press Once to Record
2. Press and Hold for 1 second or so, then Release to Stop Recording.


If you are in Trigger|Remote Level

1. Maintain Contact, Pin 4 to Pin 7 or 8 to Record
2. Open the circuit to stop recording.
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Old August 16th, 2011, 08:23 PM   #5
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Re: Run/Stop Cables from Wireless Follow Focus to nanoFlash

FYI Andrew, I believe both the Preston and Bartech can trigger momentary and continuous closure as different film cameras require one or the other, so this should not be a problem. A call to either should return info on which pins from their units will deliver which type of trigger.
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