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    USB to SD interface

    Can anyone tell me what might be involved in building an interface device to enable a USB flash drive to be used in an SD slot? I have been searching for information on this but can only find USB devices for reading SD cards. I want to do it the other way around because my DVR has an SD slot but...
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    standard batteries in a rechargeable circuit

    I'm sure this is very basic for users of this site, but I would like to mention it anyway. Recently I was trying to get an old notebook computer going again for a friend and one of the problems was a very expired cmos battery pack that can no longer be replaced. For some reason I still don't...
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