Watt meter concept?

Reply to Thread

Discussion in 'General Electronics Chat' started by twister, Apr 26, 2009.

Reply to Thread
  1. Apr 26, 2009 #1
    twister

    Thread Starter Member

    Mar 31, 2009
    15
    0
    Well, for measuring DC watt, basically we use a shunt resistor. Current go through this shunt resistor and develop a tiny voltage drop and amplified by the op-amp. But, how the amplified voltage value is used to measure the power across the load? Thanks.
     
    #1 Reply
  2. Apr 26, 2009 #2
    thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    8
    We multiply the value representing current by the applied circuit voltage.:)
     
    #2 Reply
  3. Apr 26, 2009 #3
    twister

    Thread Starter Member

    Mar 31, 2009
    15
    0
    am i correct:
    value representing current = current across shunt.
    applied circuit voltage = voltage across the load?
     
    #3 Reply
  4. Apr 26, 2009 #4
    b.shahvir

    Active Member

    Jan 6, 2009
    444
    0
    Actually, value representing current = current thru shunt (load current), current thru meter proportional to voltage drop across shunt but calliberated to record load current!


    You are correct!
     
    #4 Reply
Loading...
Related Forum Posts:
  1. Lightfire

    watt-hour meter specs? EH?

    Posted by Lightfire in forum: The Projects Forum
    Replies:
    7
    Views:
    2,009
  2. kaname08

    a POWER METER for a 2x22 WATT AUDIO AMPLIFIER

    Posted by kaname08 in forum: The Projects Forum
    Replies:
    4
    Views:
    2,439
  3. Dyslexicbloke

    Variable meter shunt concept - could this work?

    Posted by Dyslexicbloke in forum: General Electronics Chat
    Replies:
    15
    Views:
    2,806
  4. needs

    2/3 watt meter problem

    Posted by needs in forum: Homework Help
    Replies:
    2
    Views:
    2,146
  5. sanwa

    Troubleshooting Watt Meter

    Posted by sanwa in forum: The Projects Forum
    Replies:
    6
    Views:
    7,020
You May Also Like:

  1. What You Need to Know about Google's Project Fi

  2. An Intro to Power Systems and Reactive Power

  3. AC/DC: Battery Power Conversion for AC Speakers (Part 1)


Load More Articles