Do I need to limit amps?

Discussion in 'General Electronics Chat' started by mega128, Oct 31, 2013.

  1. mega128

    mega128

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    Oct 31, 2013
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    Hi,

    I have a very basic question. Can I connect a circuit rated at 3V 10mA to a power supply of 3V 10A. Will the circuit survive, I assume the circuit will consume whatever it is rated for (10mA) and there is not danger.

    I do not have a specific circuit, I am asking just a generic question. For example if a device runs off coin cell battery CR2032, is it save to connect it to regulated 3V 3-10A power supply?

    Thanks all
     
    mega128, Oct 31, 2013
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  2. mega128

    Harald Kapp Moderator - sometimes not so moderate Moderator

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    Exactly. It is the correct voltage that counts.
     
    Harald Kapp, Oct 31, 2013
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  3. mega128

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    The relay coil will draw only the current it requires.

    If you mis-wire something with a tiny battery, nothing much happens. Don't do it with a 10A supply or the results will be destructive.

    edit: What's up Harald? You keep beating me to the punch!
     
    (*steve*), Oct 31, 2013
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  4. mega128

    mega128

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    Thanks Harald and Steve for clearing my doubt... Happy Halloween!
     
    mega128, Oct 31, 2013
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