Help Building a Timed Camera Trigger
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Help Building a Timed Camera Trigger
I want to use a timed trigger on a 8+ megapixel still cam rather than a video camera. The project seems simple enough and I'm hoping a 555 IC will help me accomplish this. I would appreciate some input. I'm hoping to make the circuit small & light - so this is what I'm thinking of using - a 555 IC to create the pulse, an 8 pin opto-coupler for the relay (because that's what I have), and a trim pot to vary the current being fed to the IC so that I can vary the intervals of the pulse. I was thinking of using the circuit from this page http://www.thefintels.com/aer/cameratimer.htm and modifying it to suit my needs. (eg an 8 megapixel wallet cam). I'll need the circuit to pulse the opto-coupler about every 1.5 - 30 seconds for this project. Also since I need a light weight circuit I'm wondering what the minimum power source would be. Is there a way that I could build something using a CR2032 battery or similar? Seems easy enough, until I visit digi-key and they start asking which resistance is needed for the IC. At which point, I'm stumped.
(sorry for the repost from the digital camera forum)
(sorry for the repost from the digital camera forum)