PowerR

Discussion in 'General Electronics Chat' started by jismagic, May 4, 2014.

  1. jismagic

    Thread Starter Member

    Sep 7, 2013
    77
    0
    I want to make a power resistor network.

    But i have two variables - resistor values,wattage.

    I need to create any resistor values 0.1 to 20ohms and wattage ranging from 10W to 600W.

    I was thinking of two options - 1. resistor network with all resistors with max wattage??

    2. create a pool of resistors and then pick and use values/wattage when required.

    Can you guys think of something better?

    thanks
    jis
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,083
    3,021
    For what purpose? The design of your network, and any advice we might offer, depends on what you hope to accomplish with it. Maybe a variable dummy load?
     
  3. jismagic

    Thread Starter Member

    Sep 7, 2013
    77
    0
    They will be used to simulate various loads like bulbs motors etc
     
  4. KeepItSimpleStupid

    Well-Known Member

    Mar 4, 2014
    1,135
    200
  5. jismagic

    Thread Starter Member

    Sep 7, 2013
    77
    0
    It will be only a DC output and current rating can cary from 1A to 20A
     
  6. samuel.whiskers

    Member

    Mar 17, 2014
    95
    2
    How about a kettle water heating element - I've seen them used as high power dummy loads....
     
  7. Sparky49

    Active Member

    Jul 16, 2011
    834
    417
    I've seen just a long length of enamelled copper wire being used to simulate a low R load. The middle is submerged in a bucket of water, of course, any part not submerged runs the risk of getting hot very quickly.
     
  8. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    The is a commonly recurrent question.

    Have you done a forum search?

    There are many factors to consider and your solutions depends upon what compromises you are prepared to make and what your personal resources allow.

    How would you make a reliable connection to 0.1 ohms Where the connection resistance may be 0.3 ohms?

    Some solutions form the past

    http://forum.allaboutcircuits.com/showthread.php?t=95152&page=3

    http://forum.allaboutcircuits.com/showthread.php?t=12372&highlight=load

    see post 7 on this second one.
     
Loading...