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Thread: Battery

  1. #1

    Default Battery

    Anyone else think 9v batteries (maybe even car batteries) should come with a center tap? If they woulda put a center tap on a 9v, i wouldn't need to use one of four op amps on a virtual ground and big tech wouldnt have needed to design single supply chips. My metal detector would only take one battery. Someone in the battery business missed a market there.

  2. #2
    Super Moderator 5B4AJB's Avatar
    Join Date
    Mar 2008
    Meneou, Cyprus


    There's a great Wiki article which explains why in the second section.
    Surely a couple of humble 18650's would make a good replacement for a centre-tapped version?

  3. #3


    I didn't know that, thanks!

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