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:
    2,027
  2. kaname08

    a POWER METER for a 2x22 WATT AUDIO AMPLIFIER

    Posted by kaname08 in forum: The Projects Forum
    Replies:
    4
    Views:
    2,464
  3. Dyslexicbloke

    Variable meter shunt concept - could this work?

    Posted by Dyslexicbloke in forum: General Electronics Chat
    Replies:
    15
    Views:
    2,866
  4. needs

    2/3 watt meter problem

    Posted by needs in forum: Homework Help
    Replies:
    2
    Views:
    2,169
  5. sanwa

    Troubleshooting Watt Meter

    Posted by sanwa in forum: The Projects Forum
    Replies:
    6
    Views:
    7,071
You May Also Like:

  1. New STM32 Kit Integrates Cloud Connectivity and Sensors for IoT Device Development

  2. Could These Wearables Save Lives?

  3. IMAX VR Centre Shows Off VR Hardware, Brings Virtual Reality to the Public


Load More Articles