Re: How to drive DC cctv lens iris?
- From: JosephKK <joseph_barrett@xxxxxxxxxxxxx>
- Date: Tue, 16 Oct 2007 00:57:56 -0700
mpm mpmillard@xxxxxxx posted to sci.electronics.design:
On Oct 13, 7:25?pm, abc123456de...@xxxxxxxxx wrote:
Can anyone point me to any information about driving the DC
controlled iris of a cctv lens? These things have two coils, a
driver and a damper. Voltage/current for both is normally supplied
by the camera (standard 4 pin connector), and I guess there must be
a standard but I can't find any information/specification about how
to drive the two coils.
Flashback (??)
I hit the enter key and then I remembered something...
I think the auto-iris is wide open, and you just apply a voltage to
close it down.
I could be wrong about that, but something tells me that's what we
did...?
It was a long time ago, so check it before burning anything up.
-mpm
That is the general default, however you can order it with autoclose
instead.
.
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