Do I need to limit amps?

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

  1. mega128

    mega128

    Joined:
    Oct 31, 2013
    Messages:
    2
    Likes Received:
    0
    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
    #1
    1. Advertisements

  2. mega128

    Harald Kapp Moderator Moderator

    Joined:
    Nov 17, 2011
    Messages:
    6,198
    Likes Received:
    902
    Location:
    Germany-Europe-Earth-Sol System-Milky Way-Laniakea
    Exactly. It is the correct voltage that counts.
     
    Harald Kapp, Oct 31, 2013
    #2
    1. Advertisements

  3. mega128

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Joined:
    Jan 21, 2010
    Messages:
    20,404
    Likes Received:
    1,420
    Location:
    Mid way between Beijing and the Ronne Ice Shelf
    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
    #3
  4. mega128

    mega128

    Joined:
    Oct 31, 2013
    Messages:
    2
    Likes Received:
    0
    Thanks Harald and Steve for clearing my doubt... Happy Halloween!
     
    mega128, Oct 31, 2013
    #4
    1. Advertisements

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. bonzo
    Replies:
    3
    Views:
    974
    Rich Grise
    Apr 24, 2004
  2. Brad Kartchner

    How do I limit my RF reception range?

    Brad Kartchner, Aug 31, 2006, in forum: Electronic Design
    Replies:
    30
    Views:
    831
    jasen
    Sep 9, 2006
  3. w_tom
    Replies:
    0
    Views:
    1,528
    w_tom
    Jan 7, 2005
  4. Drew Cutter
    Replies:
    6
    Views:
    513
    Steve Spence
    Sep 14, 2005
  5. Don McKenzie

    Godzilla lives underneath Japan.

    Don McKenzie, Mar 14, 2011, in forum: Hobby Electronics
    Replies:
    26
    Views:
    1,211
    jones
    Mar 27, 2011
Loading...