Here it is.
Foxy
>All-right then. I will try to describe my selfmade 3V device.
>Disclaimer: I realize that my knowledge of the english language may
>cause some confusion here, because I am not familiar with the names of
>all electronic parts... So be careful and don't blame me if any
>disasters result from that. ;-)
>
>1. The camera part.
>
>Ingredients:
> 1 OM battery compartment cover
> 1 RCA jack chassis mount (1 hole mount with nut at rear)
>
>Drill a centered hole of the same diameter as the RCA chassis mount in
>the battery cover and assemble the two ingredients together. If
>necessary the central soldering pin of the RCA chassis mount can be
>shortened by bending or cutting it. It should touch the little
>connector spring in the battery compartment when closing it with the
>converted cover.
>Now you have the camera part ready. You can apply 3 volts immediately
>to the jack through any RCA plug. Centre pin is negative, shield is
>positive (connected to camera body through cover).
>
>I made this set to test the current drain in my OM bodies. Later I
>found out that it can serve as a means to apply voltage to the camera
>in adverse (cold) temperature conditions as well. For this you will
>need:
>
>2. The battery part.
>
>Ingredients:
> 1 battery or set of cells of any kind giving at least 4
> volts (max 12 volts).
> 1 low drop voltage regulator, 3.0 volt type (as used in
>
> computers)
> 1 cord with male RCA plug on one end
> 1 case to build everything in to.
>
>Connect the voltage regulator (pin connections depending on type, see
>instructions coming with device) with the battery and the cord in such
>a manner, that the central lead of the RCA-plug is negative and the
>shield is positive.
>I use one of my 6 volt battery packs for this purpose. It has two
>cables coming out of it now, the original one for 6 volts and the new
>one for 3 volts (fotunately with different plugs!). The little voltage
>regulator has found a place in the plastic top part that also contains
>the on-off switch. The 6 volt lead-gel battery in the pack is easily
>recharged when the camera has emptied it in a century or two...
>
>If the voltage connector is hard to find, you could use a poor man's
>solution by only connecting two 1.5 volt alkaline cells (e.g. AA
>cells) together with the cord. Special 2-cell cases do exist. In this
>case you will have to check the voltage regularly, particularly when
>the kids 'borrow' your cells and put their empty ones in instead...
>
>One drawback: this device cannot be used together with winder or motor
>drive. But I remember (from long ago) that another list member
>described how he (or she?) converted a winder and glued a connecting
>device on top of it, to fit exactly into the battery compartment. He
>had to sacrifice the 250 frame back cogwheel connection for this...
>He also used a voltage regulator, if I remember well. In cold weather
>the external (and kept warm) batteries used for powering the winder
>also provided the camera with energy. Maybe one of the other list
>members has better archives than I have and can give more details on
>this one...
>
>Frank van Lindert
>Utrecht - NL.
>
>
>
>
>On Mon, 9 Mar 1998 13:55:36 -0800, "Dr. Matthew J. Cordery"
><cordery1@xxxxxxxx> wrote:
>
>>
>>Hey, thanks for the info Frank. I think we'd all be interested in hearing
>>about this! I also dashed off a note to Olympus just to see what the deal
>>was with battery packs (just to double check).
>>Matthew
>>
>>>On Mon, 9 Mar 1998 17:36:10 -0000, "David Brown" <keswick@xxxxxxxxxxx>
>>>wrote:
>>>
>>>>Olympus make a 3V Battery holder 1 which connects to the battery
>>>>compartment and allows the batteries to be kept warm inside clothing. I
>>>>don't have one I'm afraid.
>>>>
>>>>David
>>>
>>>Matthew, and David.
>>>
>>>Before you start a desparate search I might add that the part you are
>>>referring to (I haven't got one either) has a plug that only fits into
>>>the OM-2 or 2N. For all other OM-bodies you will have to assemble
>>>something yourself, like I did.
>>>You will need some electronic skill, though, or a handy-man who can
>>>hold a soldering iron... if wanted, I can provide a recipe.
>>>
>>>Frank van Lindert
>>>Utrecht - NL.
>>>
>>>>----------
>>>>> From: Dr. Matthew J. Cordery <cordery1@xxxxxxxx>
>>>>> To: olympus@xxxxxxxxxxxxxxx
>>>>> Subject: [OM] External battery pack
>>>>> Date: 09 March 1998 17:08
>>>>>
>>>>>
>>>>> I'm looking to find an external battery pack for use in cold weather
>>>>> situations (I'm not using a winder/motor drive). What piece of OM
>>>>equipment
>>>>> am I looking for and does anyone have one they might like to part
with?
>>>>>
>>>>> Matthew
>>>>>
>>>>>
>>>>>
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>>
>>
>>--------------------------------------------------------------
>>Dr. Matthew J. Cordery cordery1@xxxxxxxx
>>Environmental Computer Applications Div. (510) 423-6858
>>Lawrence Livermore National Laboratory
>>L206
>>P.O. Box 808
>>Livermore, CA 94550
>>
>>A bad day in the mountains is better than a good day at work.
>>--------------------------------------------------------------
>>
>>
>>
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