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Thread: Shutter trigger - suggestions for batteries

  1. #1

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    Shutter trigger - suggestions for batteries

    I am building a wired trigger for shutters. My working prototype is powered by 4 AA Eneloop batteries. I get around 500 actuations per charge, which is quite good, I think. The only issue is that the case then becomes quite bulky. My friend, who is designing the electronics, suggests using a 3.7V lithium battery like this: http://www.batterybob.com/products/1...ery-pda-279li/ He tested this battery, and the results were quite good.

    But these batteries require charging within the device, which leads to all sorts of regulatory issues. I'd prefer to use a standard camera or video camera battery like this Watson battery. But I've not been able to locate a holder for these batteries.
    Can I use this adapter plate to hold the batteries within the device?

    Any other suggestions?

    Thanks,
    Kumar

  2. #2

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    Re: Shutter trigger - suggestions for batteries

    I don't know what your power requirement is but if I were doing this I'd try to base it on a small LED flashlight like a small Surefire with 2 CR123a batteries and a momentary switch, and run my wire right out of the front of that to the shutter. Grip, switch, battery compartment, all in one small package.
    Thanks, but I'd rather just watch:
    Large format: http://flickr.com/michaeldarnton
    Mostly 35mm: http://flickr.com/mdarnton
    You want digital, color, etc?: http://www.flickr.com/photos/stradofear

  3. #3

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    Re: Shutter trigger - suggestions for batteries

    The current drawn is ~1A. Can these batteries deliver that?

  4. #4

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    Re: Shutter trigger - suggestions for batteries

    No idea.
    Thanks, but I'd rather just watch:
    Large format: http://flickr.com/michaeldarnton
    Mostly 35mm: http://flickr.com/mdarnton
    You want digital, color, etc?: http://www.flickr.com/photos/stradofear

  5. #5

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    Re: Shutter trigger - suggestions for batteries


  6. #6

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    Re: Shutter trigger - suggestions for batteries

    Thank you.

  7. #7

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    Re: Shutter trigger - suggestions for batteries

    As it happens, I'm doing a lot of work with AA cells at the moment; they definitely don't do what the label says they do!

    I would recommend *not* using rechargeable in-device cells; your electronic friend will know that the charging is problematical. You might though consider using a Lithium Manganese Dioxide AA cell, which will give you the six volts you need in only two AA-sized cells, so half the size of your current pack. http://uk.farnell.com/varta/61171013...-aa/dp/8636192

    Neil

  8. #8

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    Re: Shutter trigger - suggestions for batteries

    Hi Neil,

    That is very helpful. I don't want to use in-device rechargeable cells, which is what my electronics friend suggested. Coping with the regulatory issues surrounding them would be impossible for me. I also want to use batteries that photographers would already have - like AA Eneloops and 3.7V / 7.2V / 7.4V Lithium. Then there's no need for them to buy special chargers, etc.

    Have you used these batteries much?

    Thanks,
    Kumar

    Edit: I can't find these batteries in any of the major stores in Japan. Panasonic too does not list them in their catalog.

  9. #9

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    Re: Shutter trigger - suggestions for batteries

    You know, if you use one of the battery types that photographers "already have"... they'd also have the charger.

  10. #10
    Randy Moe's Avatar
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    Re: Shutter trigger - suggestions for batteries

    I use 30 AA Eneloops in rotation in 4 SB 800. Several LED Torch. All normal remotes get AAA Eneloops. Only PCB Cyper Commander cannot use them. I stock a big pile of Duracell in all sizes. Of course for any digital camera we need at least 2 special batteries and AC adapter.

    Next I want PCB Vagabond...

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