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  1. sstrik

    How to determine size of small electric generator

    I am designing a small timing circuit and need a power source of around 4 volts and producing around 15 to 20 mA for around 5 to 10 seconds. I am thinking of using a simple generator (iron core, copper coil) and need to get an idea of how large this needs to be. Can anyone help me with some...

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