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:
    6,728
    Likes Received:
    1,074
    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:
    21,556
    Likes Received:
    1,665
    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. support2
    Replies:
    1
    Views:
    326
    ramussons
    Jul 6, 2016
  2. andye

    Can I Connect Same Speakers To 3 Players?

    andye, Jul 19, 2016, in forum: General Electronics Chat
    Replies:
    5
    Views:
    167
  3. alex_gomez
    Replies:
    4
    Views:
    322
    Martaine2005
    Aug 24, 2016
  4. Murkeyside Exile

    Is it possible to limit voltage going to a telephone?

    Murkeyside Exile, Aug 19, 2016, in forum: General Electronics Chat
    Replies:
    3
    Views:
    255
    73's de Edd
    Aug 19, 2016
  5. Name...
    Replies:
    28
    Views:
    773
  6. jagrav
    Replies:
    19
    Views:
    367
  7. Nael
    Replies:
    9
    Views:
    317
    davenn
    Oct 12, 2016
  8. Amitp

    Need to reduce 5V 500ma to 3V 30ma

    Amitp, Oct 16, 2016, in forum: General Electronics Chat
    Replies:
    8
    Views:
    209
    Audioguru
    Oct 17, 2016
Loading...