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[OM] Re: Radio Triggers, Part IV

Subject: [OM] Re: Radio Triggers, Part IV
From: "Wayne Harridge" <wayneharridge@xxxxxxxxxxxxxxx>
Date: Sat, 24 Mar 2007 10:18:58 +1100
> 
> The oboy remotes don't actually put out any voltage to speak 
> of. They maintain an "open" state (high resistance) and 
> "short" out the connection when fired.  However, the short is 
> very short and appears to not even be a true short but a 
> reduction in resistance.
> 
> This works fine with flash gear that uses the sudden presence 
> of voltage (or current flow, depending on type of flash) to 
> fire the flash circuitry.  The winder is, I believe a 
> "current flow" mechanism that uses the shorted out condition. 
>  Since the remotes don't shot to zero resistance or reduce 
> the resistance low enough, I suspect that is what is causing 
> the winder to stall out.
> 

The "Polaroid Spectra Wireless Remote" is what you need for a winder/MD, it
sounds like it has a small relay inside, so a true contact closure.  From
memory the contact stays closed while the remote button is pressed so you
can fire off a sequence remotely.

...Wayne




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