Re: Interval mechanism
How accurately 4 hours does it have to be? If it doesn't have to be that accurate, I'd consider astable multivibrator oscilatting at say 9Hz, and use a asynchronous counter to scale it by 1/131072 and then trigger the shutter with the pulse edge. Another (more modern) way may be to use a PIC or similar cheap programmable chip. Either way, you want to find a cheap camera with electronic shutter and motor winder. If you don't understand what it is, I may suggest to find a competent electronics enthusiast or amateur radio operator in your neighborhood and offer something nice. -- Ryuji Suzuki "People seldom do what they believe in. They do what is convenient, then repent." (Bob Dylan, Brownsville Girl, 1986) From: "zeesme@gmail.com" <zeesme@gmail.com> Subject: Interval mechanism Date: Sat, 27 Sep 2008 17:14:37 -0400 > Sorry, I know this is a bit off topic but you guys are by far the best > source of misc camera information... plus the images will be printed in > salt! > > I'm building a floating a vessel with a 35mm built into it, I need to make > the camera automatically take a picture every 4 hours. There is a good > chance this camera will never come back to me so I'm trying to build it on a > budget, I figure theres plenty of cheap plastic automatic 35s out there > these days but making it fire that slowly is beyond me. Does an interval > mechanism like this exist? Any thoughts? > > Thanks so much, > > -Zev
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