Connect with us

12 V Power

Discussion in 'General Electronics Discussion' started by machineman, Oct 7, 2012.

  1. machineman

    machineman

    3
    0
    Oct 7, 2012
    I have a digital video recorder that currently uses a 110 V AC power supply that outputs 12 volts DC @ 3 amps. I would like to power this device from a 12 V car battery. Can this be done ? If so, how, and how long can I expect it to operate under the battery power?
     
  2. duke37

    duke37

    5,211
    718
    Jan 9, 2011
    If you have a battery with a capacity of 10Ahr and you draw 3A then the time is about 3 hours.
    If you are drawing 2A and have a 40Ahr battery, then the time is 20 hours.
     
  3. machineman

    machineman

    3
    0
    Oct 7, 2012
    Thank you very much. That is very helpful. I certainly appreciate it. Do I need to regulate the incoming power ?
     
  4. davenn

    davenn Moderator

    13,242
    1,742
    Sep 5, 2009
    that really depends on how much variation the DVR can tolerate from the 12V
    A fully charged battery could be as high as 13.5 - 14V
    Is the currently used plugpack supply regulated ?
    it should be marked regulated or unregulated


    Dave
     
  5. machineman

    machineman

    3
    0
    Oct 7, 2012
    Dave,
    I will check that. Thank you.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-