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daverj
Vintage Video Wiggler


Joined: 19 Jun 2009
Last Visit: 19 Jun 2013

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PostPosted: Wed Feb 01, 2012 6:37 pm    Post subject: Reply with quote Add User to Ignore List
smrl wrote:
Yeah, I had considered using an oscillator as well! It averages across frames, but then outputs a single frame, followed by black for the remainder of the exposure. So I need a way to store the frame in a framebuffer. I can use the WEN output which is on the DB9 connector on the back, (probably TTL level as well?) which might only trigger every new frame. The manual is ambiguous and doesn't go into much detail about these WEN signals. Lot of work just to get a freeze frame but voltage-control over the rate would definitely be something worth trying


Not familiar with the WEN signal, but it sounds like a good guess that it would be a TTL level or something at least compatible with that. You could look at it on a scope to be sure.
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smrl
Common Wiggler


Joined: 01 Feb 2011
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Location: Milwaukee WI
PostPosted: Wed Feb 01, 2012 6:53 pm    Post subject: Reply with quote Add User to Ignore List
Good chance it will work, I think WEN stands for "write enable", as in, the frame is returning, grab it now.

http://pro.sony.com/bbsccms/assets/files/mkt/indauto/Brochures/is-1108 -a.pdf

There's a timing diagram with the WEN signal on these cameras.
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daverj
Vintage Video Wiggler


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PostPosted: Thu Feb 02, 2012 3:06 am    Post subject: Reply with quote Add User to Ignore List
Yup. It looks like you can either use it as a write enable gate, or use the rising edge of it to trigger a single frame capture.
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